外键（FK_ 必须与引用的主键具有相同的列数

Question

我正在使用旧数据库，其中 Table A 由 3 个复合键组成，Table B 由 2 个复合键组成，它们与 [=] 中的两个复合键相同37=]一个

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 来自哪里？

莫非我的组合键既是PK的一部分，又起到了FK的作用，即"Derived Identities"？

Answer 1

我遇到了类似的问题，我以这种方式解决了映射 table：

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]
    ...
}

外键（FK_ 必须与引用的主键具有相同的列数

Foreign key (FK_ must have same number of columns as the referenced primary key

hibernate

grails

grails-orm