Spring MVC + Hibernate Cannot get item property - spring

Question

I,m stuck. I have a problem with output of data. I try to make some kind of order-product project. My Entities are following:
#Entity
#Table(name = "sales")
public class Sale implements Serializable {
public Sale() {
}
#Id
#Column
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column(insertable = false, updatable = false)
private Timestamp date;
#OneToMany(fetch = FetchType.EAGER, mappedBy = "sale")
private List<OrderItem> items = new ArrayList<OrderItem>();
#Column
private double cost;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Timestamp getDate() {
return date;
}
public void setDate(Timestamp date) {
this.date = date;
}
public List<OrderItem> getItems() {
return items;
}
public void setItems(List<OrderItem> items) {
this.items = items;
}
public double getCost() {
return cost;
}
public void setCost(double cost) {
for(OrderItem item : items)
cost += item.getProduct().getPrice() * item.getQuantity();
this.cost = cost;
}
}
#Entity
#Table(name = "products")
public class Product implements Serializable {
public Product() {
}
#Id
#Column
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column
private String name;
#Column
private double price;
#OneToMany(fetch = FetchType.EAGER, mappedBy = "product")
private Set<OrderItem> items = new HashSet<OrderItem>();
public int getId() {
return id;
}
public void setId(int 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<OrderItem> getItems() {
return items;
}
public void setItems(Set<OrderItem> items) {
this.items = items;
}
public boolean isNew() {
return this.id == 0;
}
}
#Entity
#Table(name = "order_items")
public class OrderItem implements Serializable {
#Id
#GeneratedValue
#Column(name = "id")
private Long id;
#Column
private int quantity;
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "product_id")
private Product product;
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "sale_id")
private Sale sale;
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public Product getProduct() {
return product;
}
public void setProduct(Product product) {
this.product = product;
}
}
SQL tables create like this:
CREATE TABLE products (
id SERIAL PRIMARY KEY NOT NULL,
name CHARACTER(50) NOT NULL,
price REAL NOT NULL
)
WITH ( OIDS = FALSE );
CREATE TABLE sales (
id SERIAL PRIMARY KEY NOT NULL,
cost REAL NOT NULL,
date TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
)
WITH ( OIDS = FALSE );
CREATE TABLE order_items (
id SERIAL NOT NULL,
sale_id INTEGER NOT NULL,
product_id INTEGER,
quantity INTEGER NOT NULL,
primary key (sale_id, id)
)
WITH ( OIDS = FALSE );
ALTER TABLE order_items
ADD CONSTRAINT order_itemsFK0 FOREIGN KEY (product_id) REFERENCES products(id);
ALTER TABLE order_items
ADD CONSTRAINT order_itemsFK1 FOREIGN KEY (sale_id) REFERENCES sales(id);
My sale form:
<form:hidden path="id" />
<spring:bind path="items">
<div class="form-group ${status.error ? 'has-error' : ''}">
<label class="col-sm-2 control-label">Product</label>
<div class="col-sm-5">
<form:select path="items" class="form-control">
<form:options items="${productMap}" />
</form:select>
<form:errors path="items" class="control-label" />
</div>
<div class="col-sm-5"></div>
</div>
</spring:bind>
<spring:bind path="items">
<div class="form-group ${status.error ? 'has-error' : ''}">
<label class="col-sm-2 control-label">Quantity</label>
<div class="col-sm-10">
<form:radiobuttons path="items" items="${numberList}" element="label class='radio-inline'" />
<br />
<form:errors path="items" class="control-label" />
</div>
</div>
</spring:bind>
<spring:bind path="cost">
<div class="form-group ${status.error ? 'has-error' : ''}">
<label class="col-sm-2 control-label">Cost</label>
<div class="col-sm-10">
<form:input path="cost" type="text" class="form-control" id="cost"
placeholder="Cost" />
<form:errors path="cost" class="control-label" />
</div>
</div>
</spring:bind>
And i have problems on form where I try to add sale. Items is incorrect, doesn`t save. i write jsp code wrong but i have no idea how to get it right. Need help, please!

Answer 1

Do you have some log? make sure that your post is arriving to the server side.

Answer 2

Solved. I remade some stuff in the project, in jsp part. Add additive page and everything works good.