I have my mysql query selected fields (item_code, item_name, item quantity, item_selltype, item_selldetail) but some of these fields are variants.
Dim sqlConn As String = ("SELECT item_code, item_name, item_quantity, item_selltype, item_selldetail FROM qa_items")
Dim objDataAdapter As New MySqlDataAdapter(sqlConn, objConn)
I suppose that the query returns:
item_code, item_name, item_quantity, item_selltype, item_selldetail
01 Ball 5 unit 10.52
02 Keyoard 10 unit 50.00
03 Gasoline 5 gallon 70.45
DataGridView control looks so:
Code, Name, Inv, Unit Price, Box Price, Pound Price, Gallon Price
then I need this result in datagridview:
Code, Name, Inv, Unit Price, Box Price, Pound Price, Gallon Price
01 Ball 5 10.52 0 0 0
02 Keyboard 10 50.00 0 0 0
03 Gasoline 5 0 0 0 70.45
I searched in many ways some code that can do this but I can not succeed, help..
I think you need a translator object. Get your data from the database, and use it to populate a List<> of something like this:
class Item
{
public int Code { get; private set; }
public string Name { get; private set; }
public int Inv { get; private set; }
[DisplayName("Unit Price")]
public double UnitPrice { get; private set; }
[DisplayName("Box Price")]
public double BoxPrice { get; private set; }
[DisplayName("Pound Price")]
public double PoundPrice { get; private set; }
[DisplayName("Gallon Price")]
public double GallonPrice { get; private set; }
public Item(int item_code, string item_name, int item_quantity, string item_selltype, double item_selldetail)
{
Code = item_code;
Name = item_name;
Inv = item_quantity;
UnitPrice = 0;
BoxPrice = 0;
PoundPrice = 0;
GallonPrice = 0;
switch (item_selltype)
{
case "unit": UnitPrice = item_selldetail; break;
case "box": BoxPrice = item_selldetail; break;
case "pound": PoundPrice = item_selldetail; break;
case "gallon": GallonPrice = item_selldetail; break;
default: throw new InvalidExpressionException();
}
}
}
Then set the DataSource of the grid to that List<Item>.
Related
I have the following problem with Hamcrest:
I have a List of Employee
List<Employee> employees = hamcrest.getEmployees();
where:
public class Employee {
private String name;
private int age;
private double salary;
public Employee(String name, int age, double salary) {
super();
this.name = name;
this.age = age;
this.salary = salary;
}
and:
public List<Employee> getEmployees() {
Employee e1 = new Employee("Adam", 39, 18000);
Employee e2 = new Employee("Jola", 26, 8000);
Employee e3 = new Employee("Kamil", 64, 7700);
Employee e4 = new Employee("Mateusz", 27, 37000);
Employee e5 = new Employee("Joanna", 31, 12700);
Employee e6 = null;
return Arrays.asList(e1, e2, e3, e4, e5, e6);
}
I'd like to check if there is an object with name = Mateusz in my list.
I've tried in such a way, but something get wrong:
#Test
public void testListOfObjectsContains() {
List<Employee> employees = hamcrest.getEmployees();
assertThat(employees, Matchers.anyOf(Matchers.containsInAnyOrder(Matchers.hasProperty("name", is("Mateusz")), Matchers.hasProperty("age", is(27)))));
}
How can I check this using Hamcrest?
I've spent over 2 hours to find the solution in Internet but unfortunately without success.
Thank you very much in advance!
You need the matcher hasItem
assertThat(
x,
hasItem(allOf(
Matchers.<Employee>hasProperty("name", is("Mateusz")),
Matchers.<Employee>hasProperty("age", is(27))
))
);
You can also use hasItems, contains or containsInAnyOrder :
assertThat(
x,
hasItems( // or contains or containsInAnyOrder
Matchers.<Employee>hasProperty("name", is("Mateusz")),
Matchers.<Employee>hasProperty("age", is(27))
)
);
After going through several threads similar to my problem with unsuccessful result, I am posting this. I get the error as in the heading. Below is my model file Product
Product.java
package com.ms.Products;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "product")
public class Product {
#Id
#Column(name = "ProductId")
private String ProductId = null;
#Column(name = "ProductName")
private String ProductName = null;
#Column(name = "ProductCategory")
private String ProductCategory = null;
#Column(name = "Price")
private double Price = 0;
#Column(name = "Quantity")
private int Quantity = 0;
public Product() {
}
public Product(String productId, String productName, String prodcutCategory, double princeInEuros,
int quantityAvailable) {
this.ProductId = productId;
this.ProductName = productName;
this.ProductCategory = prodcutCategory;
this.Price = princeInEuros;
this.Quantity = quantityAvailable;
}
public String getProductId() {
return ProductId;
}
public void setProductId(String productId) {
this.ProductId = productId;
}
public String getProductName() {
return ProductName;
}
public void setProductName(String productName) {
this.ProductName = productName;
}
public String getProdcutCategory() {
return ProductCategory;
}
public void setProdcutCategory(String prodcutCategory) {
this.ProductCategory = prodcutCategory;
}
public double getPrinceInEuros() {
return Price;
}
public void setPrinceInEuros(double princeInEuros) {
this.Price = princeInEuros;
}
public int getQuantityAvailable() {
return Quantity;
}
public void setQuantityAvailable(int quantityAvailable) {
this.Quantity = quantityAvailable;
}
}
Database schema
mysql> SHOW TABLES;
+--------------------+
| Tables_in_products |
+--------------------+
| category |
| product |
| users |
+--------------------
+
My product table
mysql> select * from product;
+-----------+-------------+-----------------+-------+----------+
| ProductId | ProductName | ProductCategory | Price | Quantity |
+-----------+-------------+-----------------+-------+----------+
| 1 | Cheese | L | 1.65 | 25 |
| 2 | Milk | L | 0.5 | 55 |
+-----------+-------------+-----------------+-------+----------+
2 rows in set (0.00 sec)
my application.properties
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
spring.datasource.url=jdbc:mysql://localhost/Products
spring.datasource.username=root
spring.datasource.password=sj
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
Please any help me with an idea on what am i missing here or what i need to do here?
I get this error while trying to add or view. M controller code
PRoductController.java
#Autowired
private ProductService productService;
#RequestMapping("/allProducts")
public List<Product> getAllProducts(){
return productService.getAllProducts();
}
#RequestMapping("/addProduct")
public String addProduct(Product productFromView) {
Product product = new Product();
product.setProductId("3");
product.setProductName("Salt");
product.setProdcutCategory("L");
product.setPrinceInEuros(0.65);
product.setQuantityAvailable(20);
productService.addProduct(product);
return "Product Added";
}
ProductService.java
public List<Product> getAllProducts(){
List<Product> products = new ArrayList<Product>();
productDao.findAll().forEach(products::add);
return products;
}
public void addProduct(Product product) {
productDao.save(product);
}
I have the following table:
| Math | English | Chemistry
John J. | A | F | B
Mike M. | A | F | B
Eve E. | A | F | B
So I have a variable number of columns (can be set up at run time) and a variable number of students.
My SQL DB can look like:
Table 1
studentID
studentName
studentAddress
Table 2:
disciplineID
disciplineName
disciplineTeacher
Table 3:
studentID
disciplineID
grade
How should my model look like? Can I do something like:
public class Catalog
{
public int ID { get; set; }
public virtual IEnumerable<Discipline> Disciplines { get; set; }
public virtual IEnumerable<Student> Students { get; set; }
public virtual IEnumerable<Grades> StudentGrades { get; set; }
}
internal class Discipline
{
public int ID { get; set; }
public string Name { get; set; }
}
internal class Student
{
public int ID { get; set; }
public string Name { get; set; }
}
internal class Grades
{
public int StudentId { get; set; }
public int DisciplineId { get; set; }
public char Grade { get; set; }
}
Is this the normal way to do this multi-column/run-time definition?
How can I ensure the disciplines are always in the same order in the view?
How can I ensure that in the view, when I render the table row, for each student the correct Grade is displayed for the correct Discipline?
Thanks!
Is this the normal way to do this multi-column/run-time definition?
It's not the only way, but (to me) doesn't seem anything wrong with passing all the separate data to the view and let the view sort it out.
You could convert to an ILookup by student - this would reduce the code in the view.
How can I ensure the disciplines are always in the same order in the view?
You've not included what you've tried so far.
Essentially: Loop through each student, then loop through each discipline and find the corresponding grade for each - if there isn't one, display a "-"
Something like: you should use #Html.DisplayFor etc
<tbody>
#foreach(var student in Model.Students)
{
<tr>
<td>#student.Name</td>
#foreach(var discipline in Model.Disiplines)
{
var grade = Model.Grades.Where(
x => x.StudentId == student.StudentId
&& x.DisciplineId == discipline.DisciplineId)
.FirstOrDefault();
<td>
#(grade==null ? "-" : grade.Grade)
</td>
}
</tr>
}
I have been exploring the Datanucleus framework and was trying some of the examples provided in the documentation. I got stuck in the M-N relation example using Sets. When I try to remove an object from the Set it is removed from the Set, but once I persist the container objects, the entry in the join table is not removed. This results in my container objects still holding the removed object.
I have a unit test that exposes the issue:
#Test
public void testMNRelation() {
final Product product = new Product();
product.setName("Product 1");
product.setPrice(100);
final Product product2 = new Product();
product2.setName("Product 2");
product2.setPrice(130);
final Supplier supplier = new Supplier();
supplier.setName("Supplier 1");
Set<Supplier> suppliers = product.getSuppliers();
suppliers.add(supplier);
Set<Product> products = supplier.getProducts();
products.add(product2);
final PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("MyStore");
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(product);
pm.makePersistent(product2);
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
pm = pmf.getPersistenceManager();
tx = pm.currentTransaction();
try {
tx.begin();
System.out.println();
System.out.println("Fetch from store (before removal)");
Supplier s = pm.getObjectById(Supplier.class, supplier.getId());
System.out.println("supplier name: " + s.getName());
System.out.println("# products: " + s.getProducts().size());
Product p = pm.getObjectById(Product.class, product.getId());
System.out.println("product name: " + p.getName());
System.out.println("# suppliers: " + p.getSuppliers().size());
Product p2 = pm.getObjectById(Product.class, product2.getId());
System.out.println("product name: " + p2.getName());
System.out.println("# suppliers: " + p2.getSuppliers().size());
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
Set<Product> updatedProducts = supplier.getProducts();
updatedProducts.remove(product);
Set<Supplier> updatedSuppliers = product.getSuppliers();
updatedSuppliers.remove(supplier);
System.out.println();
System.out.println("Before persist (after removal)");
System.out.println("supplier name: " + supplier.getName());
System.out.println("# products: " + supplier.getProducts().size());
System.out.println("product name: " + product.getName());
System.out.println("# suppliers: " + product.getSuppliers().size());
System.out.println("product name: " + product2.getName());
System.out.println("# suppliers: " + product2.getSuppliers().size());
pm = pmf.getPersistenceManager();
tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(supplier);
pm.makePersistent(product);
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
System.out.println();
System.out.println("After persist");
System.out.println("supplier name: " + supplier.getName());
System.out.println("# products: " + supplier.getProducts().size());
System.out.println("product name: " + product.getName());
System.out.println("# suppliers: " + product.getSuppliers().size());
System.out.println("product name: " + product2.getName());
System.out.println("# suppliers: " + product2.getSuppliers().size());
pm = pmf.getPersistenceManager();
tx = pm.currentTransaction();
try {
tx.begin();
System.out.println();
System.out.println("Fetch from store");
Supplier s = pm.getObjectById(Supplier.class, supplier.getId());
System.out.println("supplier name: " + s.getName());
System.out.println("# products: " + s.getProducts().size());
Product p = pm.getObjectById(Product.class, product.getId());
System.out.println("product name: " + p.getName());
System.out.println("# suppliers: " + p.getSuppliers().size());
Product p2 = pm.getObjectById(Product.class, product2.getId());
System.out.println("product name: " + p2.getName());
System.out.println("# suppliers: " + p2.getSuppliers().size());
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
}
And the 2 types used in the example from http://www.datanucleus.org/products/datanucleus/jdo/orm/many_to_many.html
#PersistenceCapable(detachable="true")
public class Supplier {
#PrimaryKey
#Persistent(valueStrategy=IdGeneratorStrategy.INCREMENT)
private long id;
#Persistent
private String name;
#Persistent(mappedBy="suppliers")
private Set<Product> products = new HashSet<Product>();
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Product> getProducts() {
return products;
}
public void setProducts(Set<Product> products) {
this.products = products;
}
#Override
public boolean equals(Object o) {
if(this.getId() == 0) {
return false;
}
if(o instanceof Supplier) {
Supplier other = (Supplier) o;
return this.getId() == other.getId();
}
return false;
}
#Override
public int hashCode() {
return Long.toString(this.getId()).hashCode();
}
}
And
#PersistenceCapable(detachable="true")
public class Product {
#PrimaryKey
#Persistent(valueStrategy=IdGeneratorStrategy.INCREMENT)
private long id;
#Persistent
private String name;
#Persistent
private double price;
#Persistent(table="PRODUCTS_SUPPLIERS")
#Join(column="PRODUCT_ID")
#Element(column="SUPPLIER_ID")
private Set<Supplier> suppliers = new HashSet<Supplier>();
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public Set<Supplier> getSuppliers() {
return suppliers;
}
public void setSuppliers(Set<Supplier> suppliers) {
this.suppliers = suppliers;
}
#Override
public boolean equals(Object o) {
if(getId() == 0) {
return false;
}
if(o instanceof Product) {
Product other = (Product) o;
return this.getId() == other.getId();
}
return false;
}
#Override
public int hashCode() {
return Long.toString(this.getId()).hashCode();
}
}
Now, in the console I get
Fetch from store (before removal)
supplier name: Supplier 1
# products: 2
product name: Product 1
# suppliers: 1
product name: Product 2
# suppliers: 1
Before persist (after removal)
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 0
product name: Product 2
# suppliers: 1
After persist
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 1
product name: Product 2
# suppliers: 1
Fetch from store
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 1
product name: Product 2
# suppliers: 1
I would expect something like
Fetch from store (before removal)
supplier name: Supplier 1
# products: 2
product name: Product 1
# suppliers: 1
product name: Product 2
# suppliers: 1
Before persist (after removal)
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 0
product name: Product 2
# suppliers: 1
After persist
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 0
product name: Product 2
# suppliers: 1
Fetch from store
supplier name: Supplier 1
# products: 1
product name: Product 1
# suppliers: 0
product name: Product 2
# suppliers: 1
My persistence.xml includes:
<property name="datanucleus.DetachAllOnCommit" value="true" />
<property name="datanucleus.attachSameDatastore" value="true" />
<property name="datanucleus.CopyOnAttach" value="false" />
<property name="datanucleus.cache.collections.lazy" value="true" />
<property name="datanucleus.manageRelationships" value="true" />
<property name="datanucleus.manageRelationshipsChecks" value="true" />
Any idea on how to solve this?
I've got a solution to the issue. The issue seems to relate to my persistence settings. I changed the settings to
<property name="datanucleus.DetachAllOnCommit" value="true" />
<property name="datanucleus.attachSameDatastore" value="true" />
<property name="datanucleus.CopyOnAttach" value="true" />
<property name="datanucleus.cache.collections.lazy" value="true" />
<property name="datanucleus.manageRelationships" value="false" />
<property name="datanucleus.manageRelationshipsChecks" value="false" />
<property name="datanucleus.persistenceByReachabilityAtCommit" value="false" />
as I now handle both sides of the relation in my implementation.
Furthermore I implemented a Factory to simplify my test
public class Factory {
private static final PersistenceManagerFactory pmf = get();
private static PersistenceManagerFactory get() {
return JDOHelper.getPersistenceManagerFactory("MyStore");
}
public static Product buildProduct(String name, double price) {
Product product = new Product();
product.setName(name);
product.setPrice(price);
save(product);
return product;
}
public static Supplier buildSupplier(String name) {
Supplier supplier = new Supplier();
supplier.setName(name);
save(supplier);
return supplier;
}
public static void addRelation(final Supplier supplier, final Product product) {
product.getSuppliers().add(supplier);
supplier.getProducts().add(product);
save(product, supplier);
}
public static void removeRelation(Supplier supplier, Product product) {
product.getSuppliers().remove(supplier);
supplier.getProducts().remove(product);
save(product, supplier);
}
public static Product loadProduct(long id) {
return (Product) load(Product.class, id);
}
public static Supplier loadSupplier(long id) {
return (Supplier) load(Supplier.class, id);
}
private static void save(final Object... objects) {
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistentAll(objects);
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
}
private static Object load(Class<?> clazz, long id) {
final Object[] result = new Object[1];
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
result[0] = pm.getObjectById(clazz, id);
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
pm.close();
if (result[0] == null) {
throw new NoSuchElementException(clazz.getSimpleName() + " with id=" + id + " cannot be found");
}
return result[0];
}
}
So the test is simply expressed as
#Test
public void testFactoryApproach() {
Product p1 = Factory.buildProduct("product1", 50);
Product p2 = Factory.buildProduct("product2", 70);
Supplier s1 = Factory.buildSupplier("Supplier1");
System.out.println("Initial:");
System.out.println(p1);
System.out.println(p2);
System.out.println(s1);
System.out.println();
Factory.addRelation(s1, p1);
Factory.addRelation(s1, p2);
System.out.println("Relations after add:");
System.out.println(p1);
System.out.println(p2);
System.out.println(s1);
System.out.println();
Factory.removeRelation(s1, p1);
System.out.println("Relations after remove:");
System.out.println(p1);
System.out.println(p2);
System.out.println(s1);
System.out.println();
System.out.println("Relations after load:");
System.out.println(Factory.loadProduct(p1.getId()));
System.out.println(Factory.loadProduct(p2.getId()));
System.out.println(Factory.loadSupplier(s1.getId()));
}
Which result in the following output
Initial:
Product:11 (product1) - # suppliers = 0 []
Product:12 (product2) - # suppliers = 0 []
Supplier:11 (Supplier1) - # products = 0 []
Relations after add:
Product:11 (product1) - # suppliers = 1 [11:Supplier1]
Product:12 (product2) - # suppliers = 1 [11:Supplier1]
Supplier:11 (Supplier1) - # products = 2 [11:product1, 12:product2]
Relations after remove:
Product:11 (product1) - # suppliers = 0 []
Product:12 (product2) - # suppliers = 1 [11:Supplier1]
Supplier:11 (Supplier1) - # products = 1 [12:product2]
Relations after load:
Product:11 (product1) - # suppliers = 0 []
Product:12 (product2) - # suppliers = 1 [11:Supplier1]
Supplier:11 (Supplier1) - # products = 1 [12:product2]
We are using mySQL with WCF Restful service, we want to fetch our database content PACKAGEID wise...as mentioned below:
PackageId=2
{
StartRange = 1;
EndRange = 100;
IsDiscountAndChargeInPer = 1;
Discount =10;
ServiceCharge = 20;![enter image description here][1]
},
{
StartRange =101;
EndRange = 500;
IsDiscountAndChargeInPer = 1;
Discount =10;
ServiceCharge = 20;
}
PackageId=3
{
StartRange = 1;
EndRange = 100;
IsDiscountAndChargeInPer = 1;
Discount =10;
ServiceCharge = 20;
}
We have created a Result class to return result from out wcf service...for above service we have result class defined as below
[DataContract]
public class PackagePointRangeConfigurationResult : ResultBase
{
[DataMember]
public List<PackagePointRangeResult> Result;
}
public class PackagePointRangeResult
{
public int PackageId { get; set; }
public List<PointPlanInfo> Result { get; set; }
}
For fetching record we use following linq query:
var result = (from planinfo in db.mst_pointplan_info
join entityType in db.mst_entity_type
on planinfo.entityId equals entityType.id
where planinfo.entityId == entityId
&& planinfo.is_deleted != true
&& planinfo.system_id == systemId
&& entityType.enity_enum_id == entityId
group planinfo by planinfo.package_id into gplan
select new PackagePointRangeConfigurationResult
{
Result = (from planinfo in gplan
select new PackagePointRangeResult
{
PackageId = planinfo.package_id,
PointPlanInfo = (from pointPlanInfo in gplan
select new PointPlanInfo
{
StartRange = planinfo.start_range,
EndRange = planinfo.end_range,
IsDiscountAndChargeInPer = planinfo.is_discount_and_charge_in_per,
Discount = planinfo.discount,
ServiceCharge = planinfo.servicecharge,
AtonMerchantShare =planinfo.aton_merchant_share,
CommunityShare = planinfo.community_share
}).ToList()
}).ToList()
}).FirstOrDefault();
But it gives me below error:
LINQ to Entities does not recognize the method 'System.Collections.Generic.List1[PointPlanInfo] ToList[PointPlanInfo](System.Collections.Generic.IEnumerable1[PointPlanInfo])' method, and this method cannot be translated into a store expression.