Question

使用Spring数据＆amp;启动1.3.0.BUILD-SNAPSHOT与MySQL我有一个父母＆amp;孩子的关系：

父：

@Entity
public class CustomerSearchResults {

   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   public Long customerSearchResultsId;

   @OneToMany(mappedBy = "customerSearchResults", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
   @Fetch(value = FetchMode.SUBSELECT)
   private List<CustomerResult> customerAAAAList;

   @OneToMany(mappedBy = "customerSearchResults", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
   @Fetch(value = FetchMode.SUBSELECT)
   private List<CustomerResult> customerBBBBList;

   @OneToMany(mappedBy = "customerSearchResults", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
   @Fetch(value = FetchMode.SUBSELECT)
   private List<CustomerResult> customerCCCCList;
    ....
 }

子：

@Entity
public class CustomerResult {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL, optional = false)
    @JoinColumn(name = "customerSearchResultsId", nullable = false)
    private CustomerSearchResults customerSearchResults;
       ....
}

父级可以有多个相同子类型的列表。我没有在这个或任何其他成功的@ManyToOne示例中定义任何外键。

我创建了这样的结果：

CustomerSearchResults customerSearchResults = new CustomerSearchResults();
customerSearchResults.setCustomerAAAAList(anArrayList);
customerSearchResults.setCustomerBBBBList(anArrayList);
customerSearchResults.setCustomerCCCCCList(anArrayList);
customerResultsRepository.save(customerSearchResults);

不会抛出任何错误，我将CustomerSearchResults插入到该表中，并将正确的CustomerResult记录插入到该表中。唯一的问题是CustomerResults.customerSearchResultsId为null，尽管它被声明为非null

以下是我通过liquibase创建表的方法：

 <createTable tableName="CustomerSearchResults">
     <column name="customerSearchResultsId" type="bigint" autoIncrement="true">
           <constraints primaryKey="true"/>
     </column>
    ...
  </createTable>

 <createTable tableName="CustomerResult">
     <column name="id" type="bigint" autoIncrement="true">
          <constraints primaryKey="true"/>
      </column>
      ...
      <column name="customerSearchResultsId" type="bigint"/>
  </createTable>

为什么不会像这样填充子字段中的ref id customerSearchResultsId？

Answer 1

annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0' 仅用于模式生成，它在插入数据时不做任何事情。您需要在关系的两端设置属性，因此您的＆＃39; anArrayList＆＃39;中的每个条目都是如此。必须设置刚刚创建的customerSearchResults。

spring data jpa @OneToMany子ID未更新

1 个答案: