I have existing app that uses MySQL Server. Some errors I was getting when trying to add a new feature led me to upgrading to 'MySql.Data.EntityFramework 8.0.11'.
error I am getting when on:
public CitiesContext() : base("name=CitiesContext"):
An error occurred creating the configuration section handler for entityFramework: Could not load file or assembly 'EntityFramework, Version=4.6.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Under my properties, my target framework is still version 4.6.1.
Is there a 'how to document' somewhere on how to upgrade the EntityFrame work? I know several of the other installed packages were installed while targeting v 4.6.1, so lots of other types of errors using (like hay this was compiled with v 4.6) when trying to compile with a web.congf using
I have installed
PM> Install-Package EntityFramework -Version 6.4.4
Package 'EntityFramework.6.4.4' already exists in project 'Lat34North'
Time Elapsed: 00:00:00.0186347
Please note. This is a hobby for me, not a profession. The app is written using asp.net mvs an first issued in 2018. Do I just need to change the target in the properties and upgrade all the other packages??
Thank you for any help.
I am having difficulties to scaffold an existing MySQL database using EF core.
I have added the required dependencies as mentioned in the oracle doc:
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkcore.Tools" Version="6.0.0">
and then, I ran this code in the package manager console:
Scaffold-Dbcontext "server=the.server.ip.address;user=user_name;database=db_name;password=db_password;port=3306" MySql.EntityFrameworkCore -o Data -v
It shows this error:
Unable to resolve service for type
'Microsoft.EntityFrameworkCore.Diagnostics.IDiagnosticsLogger`1[Microsoft.EntityFrameworkCore.DbLoggerCategory+Scaffolding]'
while attempting to activate
'MySql.EntityFrameworkCore.Scaffolding.Internal.MySQLDatabaseModelFactory'
Here are the relevant logs in the output window:
Finding design-time services referenced by assembly 'Test2'...
Finding design-time services referenced by assembly 'Test2'...
No referenced design-time services were found.
Finding design-time services for provider 'MySql.EntityFrameworkCore'...
Using design-time services from provider 'MySql.EntityFrameworkCore'.
Finding IDesignTimeServices implementations in assembly 'Test2'...
No design-time services were found.
I don't know how shall I implement the design time classes and nor did I find any useful links in the web.
Note that I can access and run query on the database using MySQL Workbench.
I got this error not while scaffolding but when trying to create my first migration. I didn't want to downgrade to 5.0 because it would've had to be permanent since I was going to run a lot of migrations.
I fixed it by changing my provider from MySql.Data.EntityFrameworkCore to Pomelo.EntityFrameworkCore.MySql
Remove the old provider from both my API and DAL projects:
dotnet remove package MySql.EntityFrameworkCore
Add Pomelo provider
dotnet add package Pomelo.EntityFrameworkCore.MySql
Update your startup to use Pomelos configuartion:
https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCore.MySql#2-services-configuration
Migrations are working:
dotnet ef migrations add InitialCreate
According this description
https://bugs.mysql.com/bug.php?id=106592
you can solve this error by adding below class to your code
public class MysqlEntityFrameworkDesignTimeServices : IDesignTimeServices
{
public void ConfigureDesignTimeServices(IServiceCollection serviceCollection)
{
serviceCollection.AddEntityFrameworkMySQL();
new EntityFrameworkRelationalDesignServicesBuilder(serviceCollection)
.TryAddCoreServices();
}
}
and after define you have to add it as service in startup file
like this
services.AddSingleton<IDesignTimeServices, MysqlEntityFrameworkDesignTimeServices>();
After these steps you can migrate your code :)
I came across the same issue trying to scaffold an existing MySQL database. It looks like the latest version of MySql.EntityFrameworkCore (6.0.0-preview3.1) still uses the EFCore 5.0 libraries and has not been updated to EFCore 6.0.
It also seems Microsoft.EntityFrameworkCore.Diagnostics was last implemented in EFCore 5 and removed in 6.
When I downgraded all the packages to the 5 version level, I was able to run the scaffold command without that error.
To make Scaffold-Dbcontext work, I had to downgrade both the packages to 5.0.0 version.
MySql.EntityFrameworkCore
Microsoft.EntityFrameworkCore.Tools
After successful scaffolding, I upgraded these packages back to the their latest versions.
I could find the Core 6.0 documentation for microsoft.entityframeworkcore.diagnostics in the official website, but it was still not working when I tried the Scaffold-DbContext command. Had to downgrade all the packages to the last 5.0 version before it worked. Here are the packagerefs in my project settings
"Microsoft.EntityFrameworkCore.Design" Version="5.0.13"
"Microsoft.EntityFrameworkCore.Tools" Version="5.0.13"
"MySql.Data" Version="8.0.28"
"MySql.EntityFrameworkCore" Version="5.0.10"
#https://stackoverflow.com/users/1322226/quinestor I faced same issue and as #https://stackoverflow.com/users/9914700/james-ruth mentioned I downgraded the versions of all EFCore and EFCore Design to 5.0.8 in Visual Studio.
Did not look around for command line commands :) But we can also do it from from dotnet cli, which I guess you probably would be aware of. We can remove - dotnet remove package <PACKAGE_NAME>, and install specific version - dotnet add package <PACKAGE_NAME> --version
You do not need to perminately downgrade your EF version to scaffold, you can edit the project file to use
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.8">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="MySql.EntityFrameworkCore" Version="5.0.8" />
</ItemGroup>
Then you can run
dotnet ef dbcontext scaffold "[DSN String]" MySql.EntityFrameworkCore -o [DBName]
Then change your project file back (or revert changes) to use the latest version of EF.
Dont forget to edit the "protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)" and remove the DSN it adds to the code.
The latest version of MySql.EntityFrameworkCore still uses the EFCore 5.0 libraries and has not been updated to EFCore 6.0.
It also appears that Microsoft.EntityFrameworkCore.Diagnostics was removed in 6.
I resolve this error by adding the class below to my code:
public class MysqlEntityFrameworkDesignTimeServices : IDesignTimeServices
{
public void ConfigureDesignTimeServices(IServiceCollection serviceCollection)
{
serviceCollection.AddEntityFrameworkMySQL();
new EntityFrameworkRelationalDesignServicesBuilder(serviceCollection)
.TryAddCoreServices();
}
}
Then you must add it as a service in the initialization file
services.AddSingleton<IDesignTimeServices, MysqlEntityFrameworkDesignTimeServices>();
Hope this helps!
I have a project in AS3 using package com.gearsandcogs.air.extensions.
When a try to compile a Native Android APK, shows this error:
"An implementation for native extension 'com.gearsandcogs.air.extensions.PackageManager' required by the application was not found for the target platform."
In the description XML:
<extensions>
<extensionID>com.gearsandcogs.air.extensions.PackageManager</extensionID>
</extensions>
If I comment the "extensionID", compiles the apk without errors.
Sugestions to solve this or other PackageManager alternative?
Harman SDK 33.1 with VSCode+ActionScript & MXML Extensions
Thanks!
Regards!
Our PackageManager ANE is available for AIR 33+
https://github.com/distriqt/ANE-PackageManager
If there's any functionality missing that you need just contact us through the repository and we'll work on getting it added for you.
Looking for help for some solutions on switching out the default data provider for the project from MS SQL to mySQL. Eventually with the intent of deploying the solution to Auruora on AWS.
After installing the nuget package I get something along the lines of :
System.TypeLoadException: Method 'Clone' in type 'MySql.Data.EntityFrameworkCore.Infraestructure.MySQLOptionsExtension' from assembly 'MySql.Data.EntityFrameworkCore, Version=6.10.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' does not have an implementation.
This lead me to believe that there is no .NET 2.0 Entity Framework Core extention that runs for MySQL. Do I have to rollback to a different version?
For EntityFrameworkCore, it's suggested to use Pomelo.EntityFrameworkCore.MySql.
You may refer to their Getting Started documentation.
A fellow member of the community has kindly summarised the essential steps here:
Put Pomelo.EntityFrameworkCore.MySql into the xxx.EntityFrameworkCore project's .csproj file (see step 2 in the Pomelo getting started guide)
In your xxxDbContextConfigurer class put builder.UseMySql(...) rather than builder.UseSqlServer(...)
Change the connection string found in the appsettings.json file in the xxx.Web.Host project
I am a total newbie to the Hudson administration, so my question is very 101:
I downloaded hudson-3.0.0.war, which is said to be just the Hudson Core without any plugins included, and deployed it on my Apache Tomcat 7.0 server.
So Hudson as a web app is up, I can browse it, manage plugins via UI and so on.
But when I try to create my very first job as Build a free-style software project, I get the following exception:
HTTP Status 500 - java.lang.NoClassDefFoundError: org/eclipse/hudson/utils/tasks/MetaProject
type Exception report
message java.lang.NoClassDefFoundError: org/eclipse/hudson/utils/tasks/MetaProject
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/eclipse/hudson/utils/tasks/MetaProject
I assume that a certain plugin is missing (although I would expect that even the base distribution included such a basic task, but never mind...).
I cannot figure out which plugin I have to install in order to enable the job creation between all available plugins.
I am really hoping to any assistance with this issue, which I shall appreciate very much.
It looks like you are missing a dependency. Add to the pom.xml the dependency:
<dependency>
<groupId>org.eclipse.hudson</groupId>
<artifactId>hudson-plugin-utils</artifactId>
<version>3.0.1</version>
</dependency>