[英]Issue with multiple hasMany relationships to the same domain class when using composite id
我收到此异常: org.hibernate.MappingException: collection foreign key mapping has wrong number of columns: Room.cellsOrig type: component[locationX,locationY]
class Room implements Serializable {
Integer locationX;
Integer locationY;
List cellsOrig = []
List cells = []
static hasMany = [cellsOrig: Cell, cells: Cell]
static mapping = { id composite['locationX', 'locationY']
cells joinTable:'room_cells'
cellsOrig joinTable:'room_cells_orig'
}
static constrants = { locationX(nullable: false) locationY(nullable: false)
cells(nullable: false) cellsOrig(nullable: false)
}
}
我认为我做错了joinTable,但是如果没有joinTables,对Room实例的cell或cellOrig属性的任何访问都会导致org.hibernate.HibernateException: null index column for collection: Room.cells
。
关于如何以可处理复合ID的方式执行joinTable的任何建议?
如果要从该类中创建一对多。 在一个类添加的Cells类中,它属于负责该房间的Room ....
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