grails - 自定义 Grails 域类中字符串列表的可连接列类型

Question

我有一个域类，其中包含一个字符串列表作为众多属性之一。有时，列表中的字符串超过 255 个字符。那么，我怎样才能在数据库中增加这个限制呢？或者更改 CLOB 或 TEXT 类型的列类型？

Answer 1

If I understood you correctly, you want to change the type o the column in the join table of your domain class. You can do this in the mapping of your hasMany, through the type option.

class Person {
  static hasMany = [nicknames: String]
  static mapping = { 
    hasMany joinTable: [
      name: 'bunch_o_nicknames', 
      key: 'person_id', 
      column: 'nickname', 
      type: "text"
    ]
  } 
}