Displaying 20 results from an estimated 10000 matches similar to: "Lost associations"
2006 Jan 17
15
legacy database and finder_sql nightmare!
This is my first rails app with a legacy database and I''m having a
terrible time getting the models set up correctly. I have an order
table that has a primary field named order_number. I have a name table
with a primary of item_number. These two tables are liked by the
item_number and the order_number, but not as you might think. If the
order_number is 2500, then each entry in
2006 May 11
6
ActiveRecord associations
Can someone clarify this for me? Suppose I have two tables like:
class Company < ActiveRecord::Base
belongs_to :category
end
class Category < ActiveRecord::Base
has_many :companies
end
I understand that the belongs_to causes related companies to be read
from the db when I ask for a category. I suspect SQL something like
select * from categories, companies
where category.id
2006 Apr 20
4
Question about Associations
Hi all. Got a stupid-simple question about associations. I have two
models - school and course. There are a fixed number of schools (set
up in the migration). Each course is assigned a school and a school
will be associated with multiple courses...
How do I set up the associations? Do (can) I have School :has_one
:course and Course :has_many :schools?
Does the schools table then get a course_id
2006 May 24
5
where can i find a good tutorial for has_one and belongs_to?
thanks for helps!
--
Posted via http://www.ruby-forum.com/.
2006 Mar 31
2
A.R. Associations problem
Hello,
I''m learning A.R Associations by creating a simple forum that consists
of 3 tables: ahuthors, topics and posts. This is the schema:
class AddAuthorAndTopicAndPostTables < ActiveRecord::Migration
def self.up
create_table :authors do |t|
t.column :username, :string
t.column :email, :string
t.column :created_on, :datetime
end
create_table
2006 Jan 12
3
Introspecting Active Record Associations
Hi,
I''m looking into write scaffold generators that will, amoung other
things, scaffold active record associations (eg. generate select
boxes for belongs_to where you can choose a parent object) for quicker
prototyping. But...
My question is: Is there anyway of finding out what associations
exist from examining the lodel classes themselves or indeed any other
way of finding out this
2006 Feb 03
1
nested has_many associations
My question is whether the rails helper methods for handling associations can
be nested (see examples below). I suspect not as currently I''m
getting "unknown method" if I try and use two associations in one call.
The essence of the code is
class User << ActiveRecord::Base
has_many :items
class Items << ActiveRecord::Base
has_many :reservations
belongs_to
2006 May 04
2
Testing associations
I have a pretty simple model, articles and users.
class Article
belongs_to :user
end
class User
has_many :articles
end
In my unit tests I want to ensure that the associations work properly.
What''s the best way to do this? The obvious thing to do is a test in
each model.
# user_test.rb
def test_add_post
u = users(:first)
before_articles = u.articles.count
u.articles
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 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 Nov 26
5
associations help?
I have Users who can "own" Projects. There is only one owner. Users in
general can be authorized to view certain projects. Here is my initial stab
at this:
class User < ActiveRecord::Base
has_many :projects # ownership
has_many :project_viewers, :dependent => :destroy
has_many :projects, :through => :project_viewers, :uniq => true
...
end
class
2006 Feb 17
1
validate() with has_many association
I''m creating a simple portfolio site for a painter. I have a painting
and an image model with following relationship:
Painting
has_many :images
Image
belongs_to :painting
On the edit screen the user can edit the Painting data as well as upload
pictures for a thumbnails and full size image. The Image model extracts
filename, width, and height from the uploaded file, saves those
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,
-
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 Jan 08
8
I need untyped associations
I am in the process of trying to migrate to ROR from a home grown ORM,
but one stumbling block is ActiveRecord''s typed associations and object
ID assignment scheme. In the home grown system, I have a master table
which *all* objects are packed into and a master associative table which
holds *all* associations. This allows each object, regardless of type,
to have a unique ID and thus it
2006 Feb 09
2
Polymorphic Associations
If anybody on edge familiar with this could help, that would be "great" :)
I have different types of things I want to be "reviewable". So, instead of
having a slew of HABTM... this new Polymorphic Associations schtick seemed
like the best solution. I have everything setup as I thought it should be
(so I think)... but it doesn''t appear to be working correctly. Here
2006 Apr 04
1
Manipulating has_many :through associations
Hi,
I haven''t done any associations before, so please forgive my incorrect
use of terminology...
If I set up a has_many :through association, can I manipulate the
associated instances directly (like an Array), or do I need to
manipulate the join model?
For example, suppose I have two classes and the associated join model:
class foo
has_many :foo_bars
has_many :bars, :through
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 Apr 30
2
HABTM: Find sorted by number of associations
Hi,
I''ve been googling and searching the forums for some time
but can''t seem to find exactly what I''m looking for.
Suppose User HABTM Products (for example a favorites list). I would like to
construct a single query for finding Products ordered by the number of
Users that have flagged them as favorites.
Although I can construct the query using SQL a with a
2006 Jan 10
5
Select Tag and Associations
Hi there,
I''ve been working on this for awhile and have finally decided to ask
for a little guidance.I have a slight problem trying to save a
selection.
I have two models:
A "Posting" has_many "Categories", and a "Category" belongs_to one
"Posting". With that said, in the posting model I have "has_many
:categories" and within the