I am trying to set up a Many-to-Many association between 2 objects. I have gone through several tutorials and have been able to correctly set up the model. My problem is that I am having having trouble setting up the correct routes so I can view the full relationship... something like only displaying the products from a specific catego...
I have two models, links and tags, associated through a third, link_tags. The following code is in my Link model. Associations: class Link < ActiveRecord::Base has_many :tags, :through => :link_tags has_many :link_tags accepts_nested_attributes_for :tags, :allow_destroy => :false, :reject_if => proc { |attrs| attrs.all? { |k...
I have trouble with the self referential association, the models should give ma an array of models for the left_chunks and right_chunks methods, but I get everytime an empty array The source class Chunk < ActiveRecord::Base has_many :left_bindings, :foreign_key => "left_chunk_id", :class_name => "ChunkChunk", :dependent => :des...
I've got users who are members of groups through a membership join table, and one of the attributes of that join table is "administrator". I'm trying to do a check inside of a group's member view, looping through each member to see if they are an administrator. In the view I tried the following: for user in @group.users if user.admin...
I have a typical many-to-many relationship using has_many => :through, as detailed below. class member has_many member_roles has_many roles, :through => :member_roles end class role has_many member_roles has_man members, :through => :member_roles end class member_role belongs_to :member belongs_to :role # has following f...
I am thinking about ways to create a Role Based Access Control system in Rails. I have seen these great projects too (among others): RoleRequirement ActsAsPermissible RailsAuthorization BoxRoom (rails file management) My question is, is it really necessary to have a join table for everything? If I one of the tables in the relations...
I have Events, Documents, and Surveys which all need to be able to link to one another, I was planning on having a linking table with four columns as follows: link_elements{ element1_type CHAR(1) element1_id INTEGER element2_type CHAR(1) element2_id INTEGER } The problem is I can't figure out how to make the model in RoR so th...
I'm not sure if this is feasible or even preferable But I'd like to build a has_many relationship or a conditional named_scope type relationship to ease my pain into one simple relationship instead of two. Currently I have two models which basically contain the same information and belong to the same Model rooms thru the same key room_...
Is it possible to have multiple has_many :through relationships that pass through each other in Rails? I received the suggestion to do so as a solution for another question I posted, but have been unable to get it to work. Friends are a cyclic association through a join table. The goal is to create a has_many :through for friends_comm...
I have a class Bar that has a user-defined list of config keys and values, defined like this: class Bar < ActiveRecord::Base has_many :config_keys, :through => Foo has_many :config_values end So the available config keys come from the Foo class and the values for those come from the Bar class. I'm creating a form for this Bar...
Hi! This is my code: class Friend < ActiveRecord::Base belongs_to :user belongs_to :friend, :class_name => "User", :foreign_key => "friend_id" end class User < ActiveRecord::Base #... has_many :friends has_many :users, :through => :friends #... end When I now start adding users by... user.users << user2 user.save Only...
Rails 2.1.0 (Cannot upgrade for now due to several constraints) I am trying to achieve this. Any hints? A project has many users through join model A user has many projects through join model Admin class inherits User class. It also has some Admin specific stuff. Admin like inheritance for Supervisor and Operator Project has one Admin,...
A Post belongs_to a User, and a User has_many Posts. A Post also belongs_to a Topic, and a Topic has_many Posts. class User < ActiveRecord::Base has_many :posts end class Topic < ActiveRecord::Base has_many :posts end class Post < ActiveRecord::Base belongs_to :user belongs_to :topic end Well, that's pretty simple and very...
Let's say I have the following 4 tables (for examples' sake): Owners, Trucks, Boxes, Apples. An owner can have many trucks, a truck can have many boxes and a box can have many apples. Owners have an id. Trucks have an id and owner_id. Boxes have an id and truck_id. Apples have an id and box_id. Let's say I want to get all the apple...
Consider the following models: class Artist < ActiveRecord::Base has_many :artist_events has_many :events, :through => :artist_events end class Event < ActiveRecord::Base has_many :artist_events has_many :artists, :through => :artist_events, :order => 'artist_events.position' end class ArtistEvent < ActiveRecord::Base defaul...
Warning: I may have the wrong 'problem statement' but here it goes: A Campaign has many Contacts. A Campaign has many Emails. Therefore, a Contact has many Emails through a Campaign. And an Email can have many Contacts through a Campaign. Each Contact-Email pair has its own unique Status (status1, status2, etc). Each Status (for a ...
My situation is like this. Company has many users and users may belongs to many companies. And current implementation is something like below. class Company has_many :employments has_many :users, :through => :employments end class Employment belongs_to :company belongs_to :user end class User has_m...
I have two Models: Campaign and Contact. A Campaign has_many Contacts. A Contact has_many Campaigns. Currently, each Contact has a contact.date_entered attribute. A Campaign uses that date as the ate to count down to the different Events that belong_to the Campaign. However, there are situations where a Campaign for a specific Conta...
Hi folks. I've been beating my head against the wall on something that on the surface should be very simple. Lets say I have the following simplified models: user.rb has_many :memberships has_many :groups, :through => :memberships membership.rb belongs_to :group belongs_to :user STATUS_CODES = {:admin => 1, :member => 2, :invi...
Editing my question for conciseness and to update what I've done: How do I model having multiple Addresses for a Company and assign a single Address to a Contact, and be able to assign them when creating or editing a Contact? I want to use nested attributes to be able to add an address at the time of creating a new contact. That addre...