Displaying 20 results from an estimated 700 matches similar to: "polymorphic associations wrong when used with inherited class?"
2008 Oct 29
5
Polymorphic Associations with inheritance
I have two models, Article and Post, that has many Comments. However,
both Article and Post are inherited from a BaseContent class like so:
class Article < BaseContent
has_many :comments, :as => :commentable
end
class Post < BaseContent
has_many :comments, :as => :commentable
end
and here''s my Comment model:
class Comment < ActiveRecord::Base
belongs_to
2007 Sep 18
2
Making attachment_fu polymorphic
I am working on a small model mixin called attachment_kung to make
attachment_fu polymorphic, so you no longer need a different table and
Model class for every associated attachment (Productimage, Ad_doc,
etc). All you really need is one model and table to handel all your
attachments - in some cases, anyway. I have the code working, but have
run into one small hitch that I can''t seem to
2006 Feb 10
3
[Req] polymorphic associations howto
Hi people,
I''m looking into polymorphic associations as a way to cleanup some
messy parts of my code. I think they will allow me to do exectly what
I need, but since there''s little to none written on this subject, I''d be
delighted if someone could shed some light on this. Especially what
the different options and needed table structures need to be.
Thanks,
-
2007 Oct 09
5
Backticks wrapping SQL values in polymorphic associations...
Hopefully the subject line didn''t scare you. That said...
I have a simple polymorphic relationship (is that possible?):
class Part
has_many :attachments, :as => :attachable
end
class Attachment
belongs_to :attachable, :polymorphic => true
end
Calling Part.find(:first).attachments yields this SQL error:
ActiveRecord::StatementInvalid:
Mysql::Error: Unknown column
2006 Feb 27
11
Disabling anchor clicking in a draggable
Hey guys
I have an interesting problem - I have some draggable elements (sortable
actually), with links (<A>) inside them. I want the user to be able to
click on the link, however if the user drags the element I don''t want
the link to get fired. Can anyone think of a way to do this? It only
needs to work in Firefox.
Cheers
-Rob
2008 Sep 29
1
has_one :through with :source. How to alias association?
Hi to everyone,
I have the following models:
class Attachment < ActiveRecord::Base
has_attachment :content_type => [:image, ''application/pdf''],
:max_size => 3.megabytes,
:path_prefix => ''../private/attachments'',
:storage => :file_system,
:processor => :rmagick,
2006 Apr 22
9
one to many question
1. A category has parent categories.
2. A product is in many categories and a category has many products.
3. Products and category both have images in the same image table. ie. a
product and / or category could have multiple images.<=== my question is
related to this
So among other things I presume I have to do the following:
class Category < ActiveRecord:Base
#...
2006 Sep 22
2
possible to create polymorphic relationship with STI models?
I would like to associate a ‘product’ model with 3 models inherited from
‘image’: part, action and accessory.
I have it working with Has_many :through relating products to images
through attachments, I then have to determine the ‘type’ of the STI
extension. This means i have to go product.images. While this is ok, i
can see it getting tricky when i want to go products.images <<
2006 Jul 31
3
Polymorphic associations and single table inheritance
Running into an interesting problem that at first glance appears to be a
bug in the AR association code. However, it''s explicitly coded this way
so I''m not so sure.
I have some code like this:
class Address < ActiveRecord::Base
belongs_to :addressable, :polymorphic => true
end
class Person < ActiveRecord::Base
has_many :addresses, :as => :addressable,
2006 Feb 15
2
Polymorphic joins work one way, but not the other
I''ve been using polymorphic joins from edge rails based on about 5 lines
of advice Rick Olson gave me over IRC. There''s some sparse documentation
popping up but it seems to cover a somewhat different case.
Anyway - I pretty much got it to work - save for one detail. Here''s what
I have:
class Event < ActiveRecord::Base
belongs_to :attachable, :polymorphic =>
2011 Apr 05
1
Why does AR use base_class for polymorphic relationship "type"
I have a couple models that inherit from a base class that then
inherits from AR.
When they are used in a polymorphic relationship the "type" is always
the base class.
Just curious if anyone has a reason why it doesn''t use the *actual*
class rather then the base_class. I have patched AR to use the actual
class if !base_class.table_exists? but it adds another query each time
2006 Aug 16
0
Polymorphic Associations and grouping users and projects
Hi all,
In my app I would like to create user groups in my admin. Currently I
have the following models and associations that facilitate this.
class User < ActiveRecord::Base
has_many :memberships
has_many :groups, :through => :memberships
end
class Membership < ActiveRecord::Base
belongs_to :group
belongs_to :user
end
class Group < ActiveRecord::Base
has_many
2006 Jul 26
1
Polymorphic Associations: dynamic finders
Is there any sort of dynamic finder for polymorphic associations?
For example if I had:
class InviteNode < ActiveRecord::Base
belongs_to :inviteable, :polymorphic => true
end
I would like to be able to search by:
InviteNode.find_by_inviteable(some_object)
instead of having to do:
InviteNode.find_by_inviteable_id_and_inviteable_type(some_object.id,
some_object.class.name)
obviously I
2006 May 18
0
Sorting Polymorphic Associations
Recently, I converted a single table inheritance design over to
polymorphic associations as that made a lot more sense from a database
perspective. One of the features of the ui, a drag and dropable list of
items, needs to be completely reworked though.
Instead of having one table with a "sort" column, I have 1 polymorphic
table "items" acting as a pointer to 3 or 4 other
2006 Mar 31
2
Eager loading of polymorphic associations
Polymorphic associations work great until I try to do some eager
loading through :include. In my example, the interface name is
":imagehaver". Here''s my little eagerly loading find line:
Image.find(params[:id], :include => :imagehaver)
All it gives me is an ActiveRecord::EagerLoadPolymorphicError with no
further explanation. I haven''t been able to dig up anything
2007 Oct 27
0
STI vs Polymorphic Associations
I have a MasterEvent model. It has attributes that is required by
another model Event. The user selects the MasterEvent model and I
create the Event model by merging the attributes of the selected
MasterEvent with the attributes that were presented for the Event
model in the form.
I have association declarations in the MasterEvent and Event models.
If I use STI does the subclasses inherit the
2008 Jan 04
1
eager loading and polymorphic associations
There is a dedicated section about eager loading in the docs. A
coworker discovered eager loading does not work in polymorphic
associations the hard way :-) so I''ve written a patch that documents it:
http://dev.rubyonrails.org/ticket/10610
There are at least a couple of tickets that implement something that
would change that though:
http://dev.rubyonrails.org/ticket/9640
2008 Jun 13
1
Polymorphic :through associations
Could someone please help me with this association scheme? I am
familiar with habtm as well as the :through association but this one
has me stumped.
Here is an example DB.
Tags Table:
-------------------------
id
name
Taggables Table:
--------------------------
id
tag_id
taggble_type
taggable_id
For purposes of this example say that there are 2 other tables that
can be tagged and their model
2008 Apr 21
0
Lost Polymorphic Associations in development environment causes delegate :blah, :to => to fail
Hi All
I have been struggling with this issue for a long time now. And before
I began to describe the problem its important to know that this
problem happens only in Development environment.
I am using Rails 2.0.2, here are my associations
class User
has_many :comments
has_one :profile, :as => :profileable
delegate :email, :to => :profile
end
First call to comment.user.email works
2006 Sep 17
0
[RFC] Nested Restful Resources + Polymorphic Associations
hi,
how to handle the problem addressed in this thread:
http://rails.techno-weenie.net/question/2006/9/6/nested-restful-resources-polymorphic-associations
is there any consensus on this? any comments, suggestions?
thanks,
_c
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