hibernate - 外键(FK_ 必须与引用的主键具有相同的列数

Question

我正在使用一个遗留数据库，其中表 A 由 3 个组合键组成，表 B 由 2 个组合键组成，它们与表 A 中的两个组合键相同

OnesolPeNames

class OnesolPeNames implements Serializable {

    static mapping = {
        table "ONESOL_pe_names"

        id composite: ["division", "peid"]

        columns{
            division column: 'division', length: 8, sqlType: "char"
            peid column: 'pe_id', length: 12, sqlType: "char"
            peNameU column: 'pe_name_u', length: 50, sqlType: "char"
        }
    }

    static hasMany = [ recoverySetups : RecoverySetup]

    ....

恢复设置

class RecoverySetup implements Serializable {

    static mapping = {
        table "recovery_setup"

        id composite: ["division", "peid", "orgkey"]

        columns {
            division column: 'division', length: 10, sqlType: "char"
            peid column: 'peid', length: 12, sqlType: "char"
            orgkey column: 'org_key', length: 8, sqlType: "char"

            oneSolName column: ['division', 'peid']


        }
    }

    static belongsTo = [oneSolName: OnesolPeNames]

    ....

我正在尝试像这样访问 OnesolPeNames。

recoverySetup.onesolPeNames.peNameU。

我收到以下错误

Caused by MappingException: Foreign key (FK_ib9w9pn893cwi1dkk84qs31bx:recovery_setup [division, peid,onesol_pe_names_division,onesol_pe_names_peid])) must have same number of columns as the referenced primary key (ONESOL_pe_names [division,pe_id])

我将 oneSolName 列设置为 ['division', 'peid'] , onesol_pe_names_division,onesol_pe_names_peid 在哪里来自(哪里？

难道我的复合键是 PK 的一部分，但也扮演着被称为“派生身份”的 FK 的角色？

Answer 1

我有一个类似的问题，我以这种方式解决了映射表:

class RecoverySetup implements Serializable {

    static mapping = {
        table "recovery_setup"
        id composite: ["division", "peid", "orgkey"]
        columns {
            orgkey column: 'org_key', length: 8, sqlType: "char"

            oneSolName {
                column name: 'division'
                column name: 'peid'
            }
        }
        oneSolName updateable: false, insertable: false
    }

    static belongsTo = [oneSolName: OnesolPeNames]
    ...
}