我正在尝试使用复合键映射ManyToOne关系。
我希望能够从RecoverySetup访问OnesolPeNames域对象，就像recoverySetup.onesolPeNames.peNameU
我已将以下代码添加到我的RecoverySetup映射中。
oneSolution {
column name: 'division'
column name: 'peid'
};
表A
class RecoverySetup implements Serializable {
static constraints = {
}
static mapping = {
table "recovery_setup"
id composite: ["division", "peid", "orgkey"]
columns{
division column: 'division'
peid column: 'peid'
orgkey column: 'org_key'
oneSolution {
column name: 'division'
column name: 'peid'
};
}
}
String division
String peid
String orgkey
OnesolPeNames oneSolution
}
表B
class OnesolPeNames implements Serializable {
static constraints = {
}
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]
String division
String peid
String peNameU
}
我得到以下异常
Caused by MappingException: Repeated column in mapping for entity: org.hri.pisr.domain.RecoverySetup column: division (should be mapped with insert="false" update="false")
我也发现了这个帖子One-to-Many With Composite Keys and Different Column Names in Grails
最佳答案
由GUL Foreign key (FK_ must have same number of columns as the referenced primary key解决
RecoverySetup类实现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]
...
}
关于hibernate - Gorm使用复合键进行多对一映射，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31147029/