Displaying 20 results from an estimated 6000 matches similar to: "Polymorphic has_many association through a belongs_to"
2011 Jan 11
0
[PATCH] Polymorphic belongs_to association with :conditions issues
Hey all,
Could use a few eyes on a couple of very simple patches at https://rails.lighthouseapp.com/projects/8994/tickets/6262 if any has some time.
The issue (from the ticket description):
If you define a polymorphic belongs_to association and it has conditions on it, those conditions cause a NameError when you try to access the target object, of the style saying "hey, there''s no
2006 Aug 16
1
Naming rights_roles join model using has_many :through and polymorphic associations
Hi.
I have a couple of best practices questions regarding polymorphic
associations, naming join tables and user permissions.
Currently I have implemented the user authentication model from the
rails recipes book. Basically it goes something like this:
MODEL CLASSES:
class User < ActiveRecord::Base
has_and_belongs_to_many :roles
end
class Role < ActiveRecord::Base
2006 Mar 19
2
Multiple polymorphic belongs_to declarations
I have the following models:
class Card < ActiveRecord::Base
belongs_to :deck
belongs_to :front, :polymorphic => true
belongs_to :back, :polymorphic => true
end
class TextContent < ActiveRecord::Base
has_one :card, :as => :front
has_one :card, :as => :back
end
The conflicting has_one declarations don''t work. What I need is
2010 Apr 10
1
accepts_nested_attributes + polymorphic association
im having an issue where my my polymorphic associations arent being
deleted when using accepts nested attributes
there are other accepts_nested_attributes being used and they are
deleting fine, just the polymorphic association
before i go down the path of intense thrashing at this...is this a known
issue or problem?
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2006 Apr 17
0
polymorphic association with single model as target
Hi,
I''m new to rails/ruby and not a sw programmer in the first place.
I''d like to use polymorphic associations to create tags/marks into
several dictionary tables (i.e japanese to english and japanese to
french) that share the same model. In that model I introduced a :target
field to select the database in a find query, i.e:
def self.find(*args)
for i in args
if
2011 Jul 08
0
Looking for Help/Advice on StackOverflow Question - Polymorphic Association with STI
I am having trouble with an many to many polymorphic association with
STI involved. The problem is described clearly in the following
StackOverflow question, so I will leave this thread short:
http://stackoverflow.com/questions/6582074/activerecord-has-many-through-polymorphic-associations-with-sti
I am posting here hoping to get advice/direction/a solution for this,
as I''ve so far been
2010 Mar 01
0
undefined method for Polymorphic association using Searchlogic
I am unable to call a polymorphic scope using the searchlogic plugin
as it keeps on returning ''undefined method''. I am certain it is only a
problem within my project as I created a test project and I was able
to call a polymorphic scope using the searchlogic plugin.
I am hoping someone can provide a suggestion on how to debug this
issue.
My project consists of several gems, and
2007 Dec 20
0
polymorphic has_many :through Vs Inheritance
Hi everyone.
Ive part of a project that I need to refactor, and im having some
difficultly deciding which path to take. Perhaps someone can help, I
think its primarily a design question.
A Spec consists of many Nests and many Parts. Nests contain Parts.
Here''s what I have, which works well currently:
---------------------------------------------------
class Spec <<
2006 May 05
2
Dumb polymorphic association question
Hi,
Why is it that polymorphic associations only work with the :has_many
and :belongs_to relationships? Why can''t it be a :has_one?
Matt
2010 Oct 07
1
Question on polymorphic association
I have 3 models . Doctor, Patient and User
with following associations
class Doctor < ActiveRecord::Base
has_many :patients, :dependent => :destroy
has_one :user, :as => :userable
accepts_nested_attributes_for :user
end
class Patient < ActiveRecord::Base
belongs_to :doctor
has_one :user, :as => :userable
accepts_nested_attributes_for :user
end
class User <
2006 Apr 21
3
polymorphic,has_many through can not work?
Josh Susser tells in his blog that the opposite direction of polymorphic
will get into trouble together with has_many through.
This is the url:
http://blog.hasmanythrough.com/articles/2006/04/03/polymorphic-through
I do that according to Josh Susser''s procedure:
class Tagging < ActiveRecord::Base
belongs_to :tag
belongs_to :taggable, :polymorphic => true
belongs_to
2006 Mar 26
0
Eager loading and polymorphic association
Hi all,
Is it possible to do "eager loading" with polymorphic associations ?
Ex : I have a Page model that acts as taggable. When I do
Page.find(:all), I would like to retrieve all tags associated with a
page.
Thanks,
Thomas.
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2012 Sep 08
3
Polymorphic has_and_belongs_to_many association
Hi,
I''m currently having the situation where I have to implement a polymorphic
has_and_belongs_to_many by introducing an in between model that handles all
the "has_many :as" and "belongs_to :polymorphic" association
implementations... and is not doing anything else. Thing I don''t like it
here is, I am unnecessarily loading AR instances only to execute SQL
2011 May 03
2
Database performance for polymorphic associations under high load
Hey guys,
I''ve been thinking lately about polymorphic associations, and I
wonder: is there a noticeable or tangible performance "hit" from doing
polymorphic associations when you''ve got your database under really
high query load?
So for example, maybe I have a "message" model, a "user" model and an
"administrator" model, without any
2009 Nov 01
1
please help - complicated polymorphic association
I am trying to build a shared-appointment system, where users can
subscribe to appointments and be updated whenever changes are made to
them. I have three objects in this system, appointments, users, and
subscribers. Subscribers are a polymorphic object like so:
class Subscriber < ActiveRecord::Base
belongs_to :user
belongs_to :subscribable, :polymorphic => true
end
The tricky part is
2006 Jul 26
3
Polymorphic Association with Single Table Inheritance?
Hello,
is it possible to setup a model/table schema like this:
Groupable --> Membership <-- Group
^ ^
| |
User UserGroup
I tried the following but failed:
Groupable (table with ''type'' column)
has_many :memberships, :as => :groupable
has_many :groups, :through => :memberships
2006 May 21
3
has_many :through with a polymorphic join
Hi,
Four tables: users, user_counties, uk_counties and us_counties.
Each user has many counties, and each county has many users, so I
decided to make user_counties a polymorph, so it can have counties
from different countries (each country requires a completely different
set of tables with a completely different set of properties, that''s
why there''s one table for uk_counties and
2008 Jun 12
1
unidirectional belongs_to polymorphic
The setup:
class Location::Base < ActiveRecord::Base
set_table_name :locations
...
end
class Location::Address < Location::Base
...
end
class Location::Airport < Location::Base
...
end
class Person < ActiveRecord::Base
belongs_to :location, :polymorphic => true, :class_name =>
"Location::Base"
...
end
I want a unidirectional belongs_to relationship. That
2012 Jan 18
2
Polymorphic and standard association issue
Hello all,
I''m having a strange issue with a model that belongs_to two other
models. The one association is polymorphic and the other is normal.
================================
class Role < ActiveRecord::Base
belongs_to :user
belongs_to :permission, :polymorphic => true
end
class User < ActiveRecord::Base
has_many :roles
has_many :programs, :through => :roles
end
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