Angularjs + Spring jpa repository Many-to-one field is not saving

问题

I am using Angularjs, Spring jpa repository, hibernate. The problem is "Unable to save the id of the Customer in the order table." table names: Order, CustomerGlobal reference col name for Customer in Order table is customerGlobal_id. Order belongs to a Customer. Order table has a customerGlobal_id field.

In the Entity (Order), I have defined

@ManyToOne(optional = false) @JsonIgnore
CustomerGlobal customerGlobal;

Order belongs to one Customer. If I specify a JoinColumn, hibernate is generating the column in the database. So, I think there is no issue there. I have added Getter and Setter for the customerGlobal field.

I am using JPA repository, the interface is defined as follows:

public interface OrderRepo extends JpaRepository<Order, Long>, JpaSpecificationExecutor<Order> {
...
}

I am assuming that this would work fine too.

Here is the relevant part of the html:

 <select ng-options="convertToInt(customer.id) as customer.name for customer in c" class="form-control " name="customerGlobal" ng-model="req.customerGlobal" required></select>

This is part of a form which gets saved from the associated controller. The values for c are obtained by get request on load.

[{"id":1,"name":"XYZ","contactPerson":"ABC","mobile":"1111111111","email":"abc@adef.com",}]

This seems to be working fine. I get a dropdown list of the customers in the table.

When I save the form, customerGlobal_id and other field values are sent via POST but the customerGlobal_id does not get saved to the database.

This does not seem to be a very specific problem. This is a basic many-to-one relationship that is not getting saved. I am not completely familiar with Angularjs. So please help me out with this. Thanks in advance.

回答1:

In order to save a relationship with spring rest, you shouldn't use the id of the entity, but the reference url of the entity. So let's say that you have a Car entity that has an association with a Make entity, and you want to set the make of the car. Here is what you should do:

Step 1. get the Make entity:

-get a specific `Make`: localhost:8080/makes/1

-get a a list of `Make`: localhost:8080/makes

and select the one you want:

{
  "name" : "Toyota",
  "country" : "Japan",
  "_links" : {
    "self" : {
      "href" : "http://localhost:8080/makes/1"
    }
}

Step 2. Now insert / update a Car like this:

POST/PUT http://localhost:8080/cars/123

{
  "model" : "Corolla",
  "year" : "2006",
  "hp" : 95,
  "make" : "http://localhost:8080/makes/1"
}

and NOT like this:

{
  "model" : "Corolla",
  "year" : "2006",
  "hp" : 95,
  "make" : 1
}

Spring Data Rest understands the reference url of the entity.

来源：https://stackoverflow.com/questions/33603168/angularjs-spring-jpa-repository-many-to-one-field-is-not-saving

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angularjs

jpa