Insertable = False, use of updatable = False

Turn from:insertable = false, updatable = False use

When using JPA to configure an entity, if there are two attributes (one is a generic attribute and one is a many-to-one property), the error will be indicated when mapping to the same column in the database.

At this point, add insertable = False, updatable = False, in the @joincolumn annotation of the many-to-one to resolve.

For example:

/*** User Class*/@Entity @Table (name= "Tbl_sys_user")   Public classsysuser{@Id @GeneratedValue (Generator= "System-uuid") @GenericGenerator (name= "System-uuid", strategy = "UUID") @Column (name= "user_id", unique =true, length = 40) @CsvColumn (imported=false)      PrivateString ID;//User ID@Column (Name= "User_code", nullable =false, length = 40)      PrivateString Usercode;//User Account@CsvColumn (desc= "User name", required=true) @Column (name= "user_name", length = 60)      PrivateString UserName;//User name@Column (Name= "dept_id", length = 40)      PrivateString DeptID;//Department ID (is_org=0)@ManyToOne @JoinColumn (name= "dept_id", insertable =false, updatable =false, nullable=true)      Privatesysorg Dept;//Department Object  }  

As we can see, DeptID and Dept all map to the dept_id field inside the database, but with insertable = false, updatable = False, Dept will not be saved to the database when the data is saved.

Insertable = False, use of updatable = False