Spring MVC return ajax response using Jackson
- by anshumn
I have a scenario where I am filling a dropdown box in JSP through AJAX response from the server. In the controller, I am retuning a Collection of Product objects and have annotated the return type with @ResponseBody.
Controller -
@RequestMapping(value="/getServicesForMarket", method = RequestMethod.GET)
public @ResponseBody Collection<Product> getServices(@RequestParam(value="marketId", required=true) int marketId) {
Collection<Product> products = marketService.getProducts(marketId);
return products;
}
And Product is
@Entity
@Table(name = "PRODUCT")
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private Market market;
private Service service;
private int price;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "MARKET_ID")
public Market getMarket() {
return market;
}
public void setMarket(Market market) {
this.market = market;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "SERVICE_ID")
public Service getService() {
return service;
}
public void setService(Service service) {
this.service = service;
}
@Column(name = "PRICE")
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
}
Service is
@Entity
@Table(name="SERVICE")
public class Service implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String name;
private String description;
@Id
@GeneratedValue
@Column(name="ID")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@Column(name="NAME")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Column(name="DESCRIPTION")
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
In the JSP, I need to get the data from the service field of Product also. So I in my JQuery callback function, I have written like product.service.description to get the data.
It seems that by default Jackson is not mapping the associated service object (or any other custom object). Also I am not getting any exception. In the JSP, I do not get the data. It is working fine when I return Collection of some object which does not contain any other custom objects as its fields.
Am I missing any settings for this to work?
Thanks!
