Displaying 20 results from an estimated 10000 matches similar to: "STI question"
2006 Jan 10
0
bug? : STI and :include => fk and class_name MUST be specified
I suspect this is a bug. Or a limitation.
Problem:
----------------
When you include a STI class in a ''find'' :
@results = Result.find :all, :include => :event
, you are forced to specify the fk and the class name :
belongs_to :event , :class_name => "Event", :foreign_key =>
"event_id"
.
Full code:
-----------
class Event <
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 Apr 03
2
Problems with STI in has_many/belongs_to in Rails 1.1
I have a problem that surfaced in my attempt to upgrade my application
to Rails 1.1.
We have a STI model on the "belongs_to" side of a has_many/belongs_to
relationship. All my unit tests for this model pass, and the
relationships all seem to work fine.
But in my functional tests, I''m getting errors. I''ve traced it back
into the call to the has_many
2006 Mar 19
1
some strange behavior for has_many with STI
Hi all,
I''m having some trouble with a has_many association on a table using
the single table inheritance model that I''m hoping someone can help me
with. The schema for the table is:
CREATE TABLE `comments` (
`id` int(11) NOT NULL auto_increment,
`user_id` int(11) default NULL,
`type` varchar(20) NOT NULL default '''',
`type_id` int(11) NOT NULL default
2012 Jan 29
0
ActiveAdmin: Nested attributes not working for STI
HI All,
I am having Model "Customer" using STI for sender and receiver, and i am
unable to save the both sender and receiver by nested attribute. Below are
my model and active admin resource codes, correct me if i am wrong nested
attribute on concept.
CUSTOMER MODEL:
class Customer < ActiveRecord::Base
belongs_to :sender, :class_name => "Customer"
has_many
2010 Oct 12
2
STI and :through, not working?
Artist.first.medias returns all medias. Media is an STI. Media can be
video or painting.
How do I return all paintings of an artist? Only paintings, not
videos?
In my Artist model, I tried putting:
has_many :paintings, :through => :medias
In console, I do:
Artist.first.paintings.all
And I get:
ActiveRecord::HasManyThroughSourceAssociationNotFoundError: Could
not find the source
2006 Mar 31
3
Complex Through Statement
Quick Overview:
I have an ''Employee'', some ''Merchants'' and some ''Products''. A
''Merchant'' has many ''Products''. An ''Employee'' has multiple ''Merchants'',
depending on their relationship. For example, the Employee may be the
enrollment contact for one merchant and the
2006 Feb 09
2
Crazy @55 Inheritance
I have one table, called "people".
Within this table, there are type "users", "managers".... etc. So, basic
STI.
Now, I want a "user" to have one manager, but a "manager" to have many
"users".
Since I don''t want to use HABTM... how do I set this relationship up seeing
that :has_one, :belongs_to and :has_many don''t
2006 Mar 15
1
Through method problems with custom foreign_keys
A person has a many company_branches and
A company_branch has many people.
This join is represented using a "contacts" table.
I am using a legacy schema so i am forced into using non-standard rails
primary keys. I am using the new through relationship in rails 1.1.
p=Person.find(1)
b=p.company_branches # gives this error:
ActiveRecord::StatementInvalid: OCIError: ORA-00904:
2006 Mar 29
3
Self-referential many-many joins with :through
I thought I had this nailed but.. now I''m seeing spots..
I''ve included my models below, feel free to ignore them. I''m really
just after an example that works. I couldnt find one on the wiki...
which is fair enough considering Ricks patch:
http://dev.rubyonrails.org/changeset/4022 that fixed them only went
through 5 days ago..
Cheers
-henster
2007 Mar 29
21
a better "should have valid associations"
This is pretty much the same as last time around, if you recall.
Thanks to Wilson for converting to the new form. I''ve added a few
lines. Basically, it iterates over your model associations and does
two things.
- First, just try to call the association. Usually fixes speeling
erors or other such silliness.
- Second, try to find a record with an :include on the association.
This
2006 Feb 14
6
Multiple associations to the same class
Hi,
I cannot seem to create associations like this:
class Project < ActiveRecord::Base
belongs_to :manager, :class_name => ''User'', :foreign_key => ''manager''
belongs_to :liaison, :class_name => ''User'', :foreign_key => ''liaison''
end
p = Project.new
p.manager
=> 1
trying to retrieve associated objects
2006 Sep 27
5
Question about has_one
I have a question about regarding the use of ''has_one'' in this scenario:
Schema:
User
----
id
first_name
last_name
UserMessage
----
user_id
message_id
Message
----
id
Assuming business rules dictate that a Message can have at most ONE User
(let''s assume a message can be created without a user associated to it),
these are my questions:
1) How would I use has_one
2006 Jan 09
3
Include with two references of one model of the same table
Hey guys,
I just came across this oddity, not sure what to make of it yet, but
I think it might be incorrect behavior. When doing a @inst.find(:all,
:include => ["hometeam", "awayteam"] ...) hometeam and awayteam are two
references from a belongs_to that is of the same model and of the same
table. I will get a pgerror stating that "matches", which is
2006 Oct 22
3
Keeping DRY - I like a simple life!
Hi,
I''m new to Ruby and Rails and I would be very grateful for some advice.
I''ve got the following code.
class Foo < ActiveRecord::Base
include Versionable # Some methods to handle my versioned objects
has_many :versions, :class_name => "FooVersion", :foreign_key =>
"parent_id"
belongs_to :curr, :class_name => "FooVersion",
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
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 May 28
7
Self-referential has_many :through relationship
Hi,
I have a self-referential has_many :through relationship setup to
track relationships between users. Basically relationships are
modeled as a join table with an extra column ''relation''.
create table relationships (
user_id integer unsigned not null,
friend_id integer unsigned not null,
relation char(1) not null,
)
--- relations ---
f = friend
r = request to
2006 Nov 02
4
Still Having Problems With :through When Going To Same Table... Help... please :-(
I am having a problem with doing a :through that goes back to the same table.
The following are my two classes:
>>>>>
class User < ActiveRecord::Base
has_many :spanks
has_many :spanked, :through => :spanks, :source => :spanked_user
has_many :was_spanked_by, :through => :spanks, :source => :user
end
class Spank < ActiveRecord::Base
belongs_to :spanker,
2006 Aug 02
2
Self-Referential has_many :through
Hello all.
I am trying to create a self-referential has_many :through. I used the
following site as a guide
http://blog.hasmanythrough.com/articles/2006/04/21/self-referential-through
but it still doesn''t appear to be working. I have two models. Person and
Relationship. A person has many contacts (Which is another person)
through relationships
class Person < ActiveRecord::Base