Grails

CLONE -Many-To-Many Mapping with Subclasses does not work

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Critical Critical
  • Resolution: Unresolved
  • Affects Version/s: 1.0.3
  • Fix Version/s: 1.3-RC1
  • Component/s: Persistence
  • Labels:
    None
  • Environment:
    Mac OS X Leopard, Grails 1.0.3
  • Testcase included:
    yes

Description

Using a many to many relationship with bi-directional navigation fails, if one of the related classes gets subtyped (i.e. subclassed).

For an overview see:

http://siprell.blogspot.com/2008/07/gorm-inheritance-relationships.html

Otherwise I have attached my sources to the Issue. To reproduce run a grails clean and then a grails test-app.

Activity

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Corin Moss added a comment -

I've cloned this issue highlight the aspect of this bug reported below.

The previous fix (3273) works for most cases, but I've discovered a fringe case: it requires that the class with belongsTo defined has only one belongsTo definition - ie, the following will still produce the error:

class Pentagon extends Shape{

}

class Shape { 
  static hasMany = [attributes:ShapeAttribute] 
}

class TwoDimensionalThing {

}

class ShapeAttribute{ 
  String name 
  String value 
  static hasMany = [shapes: Shape] 
  static belongsTo = [shape:Shape, twoDimensionalThing:TwoDimensionalThing] 
}

i.e. Grails will fail to start with the message:

Error loading plugin manager: No owner defined between domain classes [class Shape] and [class ShapeAttribute] in a many-to-many relationship. Example: static belongsTo = Shape

whereas if the belongsTo is only:

static belongsTo = Shape

It seems to work as expected.

Show
Corin Moss added a comment - I've cloned this issue highlight the aspect of this bug reported below. The previous fix (3273) works for most cases, but I've discovered a fringe case: it requires that the class with belongsTo defined has only one belongsTo definition - ie, the following will still produce the error: class Pentagon extends Shape{ } class Shape { static hasMany = [attributes:ShapeAttribute] } class TwoDimensionalThing { } class ShapeAttribute{ String name String value static hasMany = [shapes: Shape] static belongsTo = [shape:Shape, twoDimensionalThing:TwoDimensionalThing] } i.e. Grails will fail to start with the message: Error loading plugin manager: No owner defined between domain classes [class Shape] and [class ShapeAttribute] in a many-to-many relationship. Example: static belongsTo = Shape whereas if the belongsTo is only: static belongsTo = Shape It seems to work as expected.

People

  • Assignee:
    Unassigned
    Reporter:
    Corin Moss
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Dates

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    Updated:
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