polymorphic-associations

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In SQLAlchemy, can you filter a polymorphically associated model by the type of its associated record?

I\'m using a polymorphic association in SQLAlchemy as described in this example.It can also be found in the examples directory in the SQLAlchemy source code.[详细]

2023-02-11 08:53 分类：问答
Rails: How do I check a polymorphic association?

I have the follow model setup: class Favorite < ActiveRecord::Base belongs_to :favoritable, :polymorphic => true[详细]

2023-02-10 17:02 分类：问答
Can "touch" be used on a belongs_to polymorphic relationship in Rails?

I expected the following to work: class Attachment < ActiveRecord::Base belongs_to :attachable, :polymorphic => tr开发者_JAVA百科ue, :touch => true[详细]

2023-02-09 22:00 分类：问答
Can I map an EF entity to two tables with a polymorphic foreign key?

I would like to make a new, mapped entity that looks like this: public class PathedItem { public long Id { get; set; }// from the Items table[详细]

2023-02-06 22:13 分类：问答
How to call "owner" of this polymorphic model in Rails3

class Chair < ActiveRecord::Base has_many :buildings, :as => :faculty end class Department < ActiveRecord::Base[详细]

2023-02-05 23:45 分类：问答
How to create mysql table with many hasMany association in CakePHP?

I\'m defining a completely new database. I have now faced a problem which I would describe as \"usual\" but still could not find good[详细]

2023-02-05 14:39 分类：问答
Doctrine PHP: Polymorphic Associations

I am using Doctrine PHP ORM 2.0. What I would like to implement, is the following class hierarchy. (Please note that the following code fragment will fail to execute, as it is neither syntactically c[详细]

2023-02-05 08:26 分类：问答
How to Correctly Model this Polymorphic Association?

Given the following Entities: Container User Client Institution The Container entity has an association to one or more parties through the property AssignedToParties.[详细]

2023-02-03 21:47 分类：问答
Rails: Many-to-many Polymorphic Associations: Getting specific Type of Records

I have the following classes: class Region < ActiveRecord::Base has_many :geographical_relations, :as => :contained[详细]

2023-01-31 03:49 分类：问答
Rails: PolyMorphic or STI or something else for User management?

I\'ve been banging my head against a wall trying to wrap my head around this, so any guidance would be much appreciated...[详细]

2023-01-30 15:55 分类：问答