I have VS2017, ASP.NET CORE, VS Code and SQL Server 2014 installed on my development environment.
I downloaded the sample code from the link: https://github.com/mmacneil/ASPNetCoreGraphQL and then opened it using VSCode.
I created a database with name NHLStats and updated the connectionstring to
"NHLStatsDb": "Data Source=.;Initial Catalog=NHLStats;Trusted_Connection=True;MultipleActiveResultSets=true"
Based on the instructions mentioned in the README.md document, I navigated to the root of the \NHLStats.Api folder and then executed the CLI dotnet run command.
On running the above command I see the below error:
Application startup exception: System.ArgumentNullException: Value cannot be null.
Parameter name: connectionString
at Microsoft.EntityFrameworkCore.Utilities.Check.NotEmpty(String value, String parameterName)
at Microsoft.EntityFrameworkCore.SqlServerDbContextOptionsExtensions.UseSqlServer(DbContextOptionsBuilder optionsBuilder, String connectionString, Action1 sqlServerOptionsAction)
at NHLStats.Api.Startup.<>c__DisplayClass4_0.<ConfigureServices>b__0(DbContextOptionsBuilder options) in C:\Temp\ASPNetCoreGraphQL-master\src\backend\NHLStats.Api\Startup.cs:line 31
at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.DbContextOptionsFactory[TContext](IServiceProvider applicationServiceProvider, Action2 optionsAction)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at NHLStats.Api.Startup.<>c__DisplayClass4_0.b__1(Type type) in C:\Users\sapatro\Learning\GraphQLDetails\ASPNetCoreGraphQL-master\src\backend\NHLStats.Api\Startup.cs:line 41
at GraphQL.FuncDependencyResolver.ResolveT
at NHLStats.Api.Models.NHLStatsSchema..ctor(IDependencyResolver resolver) in C:\Temp\ASPNetCoreGraphQL-master\src\backend\NHLStats.Api\Models\NHLStatsSchema.cs:line 11
at NHLStats.Api.Startup.ConfigureServices(IServiceCollection services) in C:\Temp\ASPNetCoreGraphQL-master\src\backend\NHLStats.Api\Startup.cs:line 41
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)
at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
Related
I am looking for solution to use connection string without user name and password specified with MariaDB server. I am running app and DB server on same machine so I decided to use unix_socket authentication.
Steps to reproduce
I have two connection strings where neither variant has a password property specified:
a)
string cnn_str = #"
Server=/run/mysqld/mysqld.sock;
Port=3306;
Database=mwsdb;
Protocol=unix;
AllowUserVariables=true;
UseAffectedRows=false;";
b) variant is the same as the first one, only extended with the uid property (inpired by exception)
// appends user name - user that runs the application
// in my case the user name is 'pi'
cnn_str += $"Uid={Environment.UserName};";
Code to connect to the database:
1) Only MySqlConnector
var connection = new MySqlConnection(cnn_str);
using (connection)
{
connection.Open();
}
2) The way how I configure db context service in Program.cs using Pomelo.EF and .UseMySql()
builder.Services.AddDbContext<MwsDbContext>(dbContextOptions => dbContextOptions
/* either 2.1) */ .UseMySql(cnn_str, ServerVersion.AutoDetect(cnn_str))
/* or 2.2) */ // .UseMySql(new MySqlConnection(cnn_str), ServerVersion.AutoDetect(cnn_str))
);
The issue
I used simple code (console app) to test conectivity to MariaDB and put results into table.
Code
Connection string
Result
1
a)
exception
1
b)
works
2.1
a)
exception
2.1
b)
works
2.2
a)
exception
2.2
b)
works
The exeption which is thrown is always the same and says:
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
An unhandled exception has occurred while executing the request.
MySqlConnector.MySqlException (0x80004005): Access denied for user ''#'localhost'
...full exception output below...
I can see some information:
Access is denied because of missing user name.
Exception is thrown by MySqlConnector.
Questions:
Am I able to compose a connection string without login credentials?
I would be glad if someone could explain to me what pros and potential cons has MySqlConnection instance over connection string when passing as argument to .UseMySql(cnn_str vs. MySqlConnection).
I appreciate any help or explanation thanks in advance.
Further technical details
HW: RaspberryPi 4 Model B
SW:
OS: Debian GNU/Linux 11 (bullseye).
Local OS account: pi
SQL: Mariadb 10.5.12 with enabled plugin unix_socket authentication.
AppServer: nginx/1.18.0
Application: .NET 6 WEB API and ConsoleApp (both tested) with packages:
<PackageReference Include="MySqlConnector" Version="2.1.8" />
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="6.0.1" />
Other details about my project setup:
Create system local user account
no home dir
no-login
no pw
sudo useradd -r pi
MariaDB
Socket file path:
root#rpi:~# ls /run/mysqld
mysqld.pid mysqld.sock
Mariadb config file /etc/mysql/my.cnf contains:
[client-server]
socket = /run/mysqld/mysqld.sock
SQL select to locate file path:
MariaDB [(none)]> show variables like 'socket';
+---------------+-------------------------+
| Variable_name | Value |
+---------------+-------------------------+
| socket | /run/mysqld/mysqld.sock |
+---------------+-------------------------+
1 row in set (0.002 sec)
SQL commands to create user and grant privileges to system user in MariaDB server database:
CREATE USER 'pi'#localhost IDENTIFIED VIA unix_socket;
GRANT ALL PRIVILEGES ON mwsdb.* TO 'pi'#localhost IDENTIFIED VIA unix_socket;
Exception
MySqlConnector.MySqlException (0x80004005): Access denied for user ''#'localhost'
at MySqlConnector.Core.ServerSession.ConnectAsync(ConnectionSettings cs, MySqlConnection connection, Int32 startTickCount, ILoadBalancer loadBalancer, IOBehavior ioBehavior, CancellationToken canc>
at MySqlConnector.Core.ConnectionPool.ConnectSessionAsync(MySqlConnection connection, String logMessage, Int32 startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in /_/src>
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, Int32 startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in /_/src/MySqlConnector/Core/Co>
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, Int32 startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in /_/src/MySqlConnector/Core/Co>
at MySqlConnector.MySqlConnection.CreateSessionAsync(ConnectionPool pool, Int32 startTickCount, Nullable`1 ioBehavior, CancellationToken cancellationToken) in /_/src/MySqlConnector/MySqlConnection>
at MySqlConnector.MySqlConnection.OpenAsync(Nullable`1 ioBehavior, CancellationToken cancellationToken) in /_/src/MySqlConnector/MySqlConnection.cs:line 406
at MySqlConnector.MySqlConnection.Open() in /_/src/MySqlConnector/MySqlConnection.cs:line 369
at Microsoft.EntityFrameworkCore.ServerVersion.AutoDetect(String connectionString)
at Program.<>c__DisplayClass0_0.<<Main>$>b__3(DbContextOptionsBuilder dbContextOptions) in /home/Prog>
at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass1_0`2.<AddDbContext>b__0(IServiceProvider p, DbContextOptionsBuilder b)
at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.CreateDbContextOptions[TContext](IServiceProvider applicationServiceProvider, Action`2 optionsAction)
at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass17_0`1.<AddCoreServices>b__0(IServiceProvider p)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEng>
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEng>
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
at Program.<Main>$(String[] args) in /home/Program.cs:line 72
Program.cs:line 72
Apply migrations.
l. 72: using MwsDbContext? context = app.Services.CreateScope().ServiceProvider.GetService<MwsDbContext>();
l. 73: context?.Database.Migrate();
Am I able to compose a connection string without login credentials?
No. MySqlConnector requires the UserID to be specified, even if using a Unix socket. This is covered in this issue.
The workaround is to set the username explicitly:
var builder = new MySqlConnectionStringBuilder("...connection string...");
builder.UserID = Environment.UserName;
using var connection = new MySqlConnection(builder.ConnectionString);
(Or just hard-code ;Username = pi in your connection string.)
explain to me what pros and potential cons has MySqlConnection instance over connection string when passing as argument to .UseMySql(cnn_str vs. MySqlConnection).
The two methods seem pretty equivalent: connection string vs connection.
One uses the provided connection string; the other reads the DbConnection.ConnectionString property and uses that connection string. The former would be slightly more efficient because it's not creating an extra MySqlConnection object just to pass the connection string in; this is likely negligible in practice.
I'm trying to run dotnet ef database update InitDatabase from CLI.
I use MySQL Server 8.0.23 with Connector/NET 8.0
My project is in .NET 5.0 and I have installed the following Nuget packages :
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="5.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.NetTopologySuite" Version="5.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.Configuration" Version="5.0.0" />
<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="5.0.0" />
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="5.0.0-alpha.1" />
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql.NetTopologySuite" Version="5.0.0-alpha.1" />
</ItemGroup>
I have no trouble to create my migration, but when i want to update my MySql database, I meet the following issue :
Build started...
Build succeeded.
Done. To undo this action, use 'ef migrations remove'
D:\TT\API\Pronostiques\TrashTalkPronostics.API.UI\TrashTalkPronostics.Core.Users.Infrastructures>dotnet ef database update InitDatabase
Build started...
Build succeeded.
System.IO.FileNotFoundException: Could not load file or assembly 'TrashTalkPronostics.Core.Pronos.Data.Migrations, Culture=neutral, PublicKeyToken=null'. Le fichier spécifié est introuvable.
File name: 'TrashTalkPronostics.Core.Pronos.Data.Migrations, Culture=neutral, PublicKeyToken=null'
at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, RuntimeAssembly assemblyContext, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, AssemblyLoadContext assemblyLoadContext)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext)
at System.Reflection.Assembly.Load(AssemblyName assemblyRef, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext)
at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsAssembly..ctor(ICurrentDbContext currentContext, IDbContextOptions options, IMigrationsIdGenerator idGenerator, IDiagnosticsLogger`1 logger)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.EntityFrameworkCore.Infrastructure.Internal.InfrastructureExtensions.GetService[TService](IInfrastructure`1 accessor)
at Microsoft.EntityFrameworkCore.Infrastructure.AccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
at Microsoft.EntityFrameworkCore.Design.DesignTimeServiceCollectionExtensions.<>c__DisplayClass1_0.<AddDbContextDesignTimeServices>b__7(IServiceProvider _)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.EnsureServices(IServiceProvider services)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String connectionString, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabaseImpl(String targetMigration, String connectionString, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
Could not load file or assembly 'TrashTalkPronostics.Core.Pronos.Data.Migrations, Culture=neutral, PublicKeyToken=null'. Le fichier spécifié est introuvable.
I was first using versions 3.2.4 for Pomelo packages, but the result was the same.
If someone has any clue to solve this problem, I would really appreciate help.
EDIT : I also tried to update the different EntityFrameworkCore nuget packages to version 5.0.5, with the same result
As I was stuck for three days on this issue, I finally found how to fix it. I should have thought about it earlier.
I just copied the dll that was missing on my projetc and everything it ok
We have several microservices built on top of aspnetcore and entity framework and using the MySQL EntityFramework connector from Devart. I've noticed that if the first query that any of our applications attempts fails due to the data store being inaccessible, then the failure seems to be cached, and when the DB is finally alive, the exception is still returned to the user code.
As part of the diagnosis of this problem I tried disabling the database when the application is running and in this situation the application appears to be able to recover once the DB is available again, so I suspect the problem is related to a connection that may be cached during model initialisation.
I've also tried disabling the service provider caching and this also lets the application recover but at the cost of having to initialise the service provider each time, so this can't be used in our application but lends weight to the idea that the error is related to some form of caching.
Has anyone else had/seen this problem before? What was your solution?
Here is a stack trace for context:
at . (String , String , String , String , Int32 , String , Int32 , SshOptions , SslOptions , ProxyOptions , MySqlHttpOptions , HttpOptions , Int32 )
at .(MySqlConnection , String , String , String , String , Int32 , Int32 , MySqlProtocol , Boolean , Boolean )
at ..ctor( , MySqlConnection )
at . ( , Object , DbConnectionBase )
at .( , , DbConnectionBase )
at .( , DbConnectionBase )
at .(DbConnectionBase )
at .(DbConnectionBase )
at .(DbConnectionBase )
at . (DbConnectionBase )
at Devart.Common.DbConnectionBase.Open()
at Devart.Data.MySql.MySqlConnection.()
at Devart.Data.MySql.MySqlConnection.Open()
at Devart.Common.Entity.c7.a(DbConnection A_0)
at Devart.Common.Entity.c7.b(DbConnection A_0)
at Devart.Data.MySql.Entity.ad.a(DbConnection A_0)
at Devart.Data.MySql.Entity.aa.b(RelationalOptionsExtension A_0)
at Devart.Common.Entity.c3.a()
at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Lazy`1.CreateValue()
at System.Lazy`1.get_Value()
at Devart.Common.Entity.c3.b()
at Devart.Data.MySql.Entity.w..ctor(TypeMappingSourceDependencies A_0, RelationalTypeMappingSourceDependencies A_1, c4 A_2)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkRelationalServicesBuilder.<>c.<TryAddCoreServices>b__3_0(IServiceProvider p)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder.<>c.<TryAddCoreServices>b__7_3(IServiceProvider p)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
at Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
at Microsoft.EntityFrameworkCore.DbContext.get_Model()
at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.get_EntityType()
at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.CheckState()
at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.get_EntityQueryable()
at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.System.Linq.IQueryable.get_Provider()
at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.Include[TEntity,TProperty](IQueryable`1 source, Expression`1 navigationPropertyPath)
(our code from here on)
[Edit]
This is a bug which the Devart team have now fixed, use a version of dotConnect for MySQL later than v8.19.1905
Please try turning off pooling ("Pooling=false;" in the connection string) or clear the pool explicitly with MySqlConnection.ClearAllPools(true).
For more information, refer to:
https://www.devart.com/dotconnect/mysql/docs/?Devart.Data.MySql~Devart.Data.MySql.MySqlConnection~ConnectionString.html
https://www.devart.com/dotconnect/mysql/docs/?Devart.Data.MySql~Devart.Data.MySql.MySqlConnection~ClearAllPools(Boolean).html
I've managed to work around this by supplying an open DB connection in the configuration options action, here's my workaround:
services.AddTransient<DbConnection, MySqlConnection>();
services.AddDbContext<BusinessContext>((sp, opt) =>
{
lock (this)
{
var sql = sp.GetRequiredService<DbConnection>();
sql.ConnectionString =
Configuration.GetConnectionString("connectionstring");
if (!_isConnected)
{
sql.Open(); // Ensure we can actually get a connection
_isConnected = true;
}
opt.UseMySql(sql);
}
});
This throws an exception if the first connection attempt occurs when the DB is unavailable, and prevents the devart component from attempting the model creation until the first connection succeeds. This isn't great, and I'd prefer not to have to do this, and it won't guarantee success
I'm getting this error when,
dotnet ef migrations add InitialMigration
Method 'Create' in type
'Pomelo.EntityFrameworkCore.MySql.Query.ExpressionVisitors.Internal.MySqlSqlTranslatingExpressionVisitorFactory'
from assembly 'Pomelo.EntityFrameworkCore.MySql, Version=3.2.3.0,
Culture=neutral, PublicKeyToken=2cc498582444921b' does not have an
implementation.
Entity Framework Core .NET Command-line Tools 5.0.0-rc.2.20475.6
Full error -
Build started...
Build succeeded.
System.TypeLoadException: Method 'Create' in type 'Pomelo.EntityFrameworkCore.MySql.Query.ExpressionVisitors.Internal.MySqlSqlTranslatingExpressionVisitorFactory' from assembly 'Pomelo.EntityFrameworkCore.MySql, Version=3.2.3.0, Culture=neutral, PublicKeyToken=2cc498582444921b' does not have an implementation.
at Microsoft.Extensions.DependencyInjection.MySqlServiceCollectionExtensions.AddEntityFrameworkMySql(IServiceCollection serviceCollection)
at Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal.MySqlOptionsExtension.ApplyServices(IServiceCollection services)
at Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.ApplyServices(IDbContextOptions options, ServiceCollection services)
at Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.<>c__DisplayClass4_0.<GetOrAdd>g__BuildServiceProvider|3()
at Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.<>c__DisplayClass4_0.<GetOrAdd>b__2(Int64 k)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.GetOrAdd(IDbContextOptions options, Boolean providerRequired)
at Microsoft.EntityFrameworkCore.DbContext..ctor(DbContextOptions options)
at Commander.Data.CommanderContext..ctor(DbContextOptions`1 opt) in D:\.NET\project02\data\CommanderContext.cs:line 8
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext
context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetServiceOrCreateInstance(IServiceProvider provider, Type type)
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c__DisplayClass13_3.<FindContextTypes>b__11()
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(Func`1 factory)
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType, String namespace)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType, String namespace)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
at
Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
Method 'Create' in type 'Pomelo.EntityFrameworkCore.MySql.Query.ExpressionVisitors.Internal.MySqlSqlTranslatingExpressionVisitorFactory' from assembly 'Pomelo.EntityFrameworkCore.MySql, Version=3.2.3.0, Culture=neutral, PublicKeyToken=2cc498582444921b' does not have an implementation.
Dependencies -
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.0-rc.2.20475.6" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.0-rc.2.20475.6">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.2.3" />
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql.Design" Version="1.1.2" />
</ItemGroup>
</Project>
appsetting.js
"ConnectionStrings":
{
"DefaultConnection": "server=localhost;port=3306;database=CommanderDB;uid=root;password=ishanah"
}
startup.cs -
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddDbContext<CommanderContext>(options =>
options.UseMySql(Configuration.GetConnectionString("DefaultConnection")));
services.AddScoped<ICommanderRepo, MockCommanderRepo> ();
}
Pomelo 3.2.3 is not compatible with EF Core 5 (see Compatibility). You currently need to use an alpha prerelease from nuget.org our from our nightly build feed to use EF Core 5.
For more information, take a look at EF Core 5 Preview support:
I already resolved this problem.
Just upgrade the same version for both EF core and Pomelo.EntityFrameworkCore.MySql : 5.x.
Just take a note that you should use Pomelo in version 5.0 alpha 1 ( not alpha 2) to make the start up file run correctly.
Firstly, this project successfully working now in Windows, and was successfully worked in Linux hosting before last update. After update new version I receive error:
Frontend[30348]: ---> System.IO.FileLoadException: Could not load file or assembly 'Pomelo.EntityFrameworkCore.MySql, Version=3.1.2.0, Culture=neutral, PublicKeyToken=2cc498582444921b'. The located assembly's manifest definition does not match the assembly reference. (0x80131040)
Frontend[30348]: File name: 'Pomelo.EntityFrameworkCore.MySql, Version=3.1.2.0, Culture=neutral, PublicKeyToken=2cc498582444921b'
Frontend[30348]: at Frontend1.Startup.<>c.<ConfigureServices>b__9_0(DbContextOptionsBuilder options)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass1_0`2.<AddDbContext>b__0(IServiceProvider p, DbContextOptionsBuilder b)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.CreateDbContextOptions[TContext](IServiceProvider applicationServiceProvider, Action`2 optionsAction)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass10_0`1.<AddCoreServices>b__0(IServiceProvider p)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
Frontend[30348]: at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
Frontend[30348]: at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
Frontend[30348]: --- End of inner exception stack trace ---
Frontend[30348]: at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
Frontend[30348]: at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
Frontend[30348]: at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
Frontend[30348]: at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
Frontend[30348]: at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
Frontend[30348]: at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
Frontend[30348]: Unhandled exception. System.Exception: Could not resolve a service of type 'Microsoft.EntityFrameworkCore.DbContextOptions`1[[NewDb.Models.ApplicationDbContext, NewDb, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' for the parameter 'identityDbContextOptions' of method 'Configure' on type 'Frontend1.Startup'.
what does it means?
I deploy my project to hosting as binary. All NET CORE library present in hosting. Also have redirection to another library version in project file (and result file Frontend.dll.config is present).
I have shared library with my DB definition, that definition shared about 10 project. In project with DB definition I have only POCO class. Library with DB definition is present in project folder. Also application.json with connection string is present in hosting.
In project I have this configuration. Now this config working perfectly in Windows and was working in Linux hosting with previous version too.
services.AddDbContext<ApplicationDbContext>(
(Microsoft.EntityFrameworkCore.DbContextOptionsBuilder options) =>
options.UseMySql(Configuration.GetConnectionString("DefaultConnection"),
(Microsoft.EntityFrameworkCore.Infrastructure.MySqlDbContextOptionsBuilder mySqlOption) =>
{
mySqlOption.CommandTimeout(10);
mySqlOption.EnableRetryOnFailure(10);
}),
ServiceLifetime.Transient, ServiceLifetime.Transient);
services.AddIdentity<ApplicationUser, IdentityRole>(options =>
{
options.Password.RequiredLength = 4;
options.Password.RequireUppercase = false;
options.Password.RequireLowercase = false;
options.Password.RequireUppercase = false;
options.Password.RequireNonAlphanumeric = false;
options.SignIn.RequireConfirmedEmail = true;
}).AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
I has uploaded library from C:\Users\khark.nuget\packages\pomelo.entityframeworkcore.mysql\3.1.2 (instead publish project's directory) and project is raising.