New to both Ruby and Rails but I'm book educated by now (which apparently means nothing, haha). I've got two models, Event and User joined through a table EventUser class User < ActiveRecord::Base has_many :event_users has_many :events, :through => :event_users end class EventUser < ActiveRecord::Base belongs_to :event belongs...
I'm wondering what the easiest/most elegant way of selecting attributes from join models in has_many :through associations is. Lets say we have Items, Catalogs, and CatalogItems with the following Item class: class Item < ActiveRecord::Base has_many :catalog_items has_many :catalogs, :through => :catalog_items end Additio...
With a regular has_many, there's the option of :dependent => :destroy to delete the associations when the parent record is deleted. With has_many :through, there might be other parents associated to the child records, so :dependent => :destroy doesn't have any effect. How do you ensure child records are deleted after they are orphaned f...
Hello, I have a model, Feed, that has and belongs to many FilteredUsers. In this case I have implemented it through a has_many :through relationship. class Feed < ActiveRecord::Base has_many :denials, :dependent => :destroy has_many :filtered_users, :through => :denials I would like to create a record if it doesn't exist or find t...
I have an Entry model and a Category model, where an Entry can have many Categories (through EntryCategories): class Entry < ActiveRecord::Base belongs_to :journal has_many :entry_categories has_many :categories, :through => :entry_categories end class Category < ActiveRecord::Base has_many :entry_categories, :dependent => :de...
Hi there, Been trying to sort this for over a day now, and I am sure that it is something simple that I am missing. I have a project, which can have one main category and two optional categories. My relevant code for the project model: has_many :project_categories has_one :optional_category_1, :through => :project_cate...
Hi there, I have a basic has_many :through relationship that is bi-directional: calendars have many calendar_calendar_events calendars have many events through calendar_calendar_events events have many calendar_calendar_events events have many calendars through calendar_calendar_events I'm wanting to assign calendars to an event wit...
as an example, i have a model Group and model User they are connected with :has_many, :through => groups_users groups_users table has an attribute, called moderator, specifying whether a user is a moderator of the group question: how do i access all moderators of a given group? after reading about :with_scope, what comes to mind is ...
I have a model Group and model User They are connected both directions with "has_many :through => groups_users" groups_users table has an attribute, called moderator, specifying whether a user is a moderator of the group when i am trying to update join module attribute, i get a mistake way i am doing it now: @group_membership=@group...
Apparently dependent => destroy is ignored when also using the :through option. So I have this... class Comment < ActiveRecord::Base has_many :comment_users, :dependent => :destroy has_many :users, :through => :comment_users ... end ...but deleting a Comment does not result in the associated comment_user records getting deleted...
Hi all, I'm having problems adding to a Has Many Through association using user_ids. My communication model looks like this: class communication has_many :recipients has_many :users, :through => :recipients end In my create action for the communication controller I am trying to manually add user_ids to the communication object lik...
I've created three classes to represent Books, People, and BookLoans. While I am able to show the association of People to Books through BookLoans I've been seeding my database. I now need to save a checkout of a book. It was my intention to do this action through the book controller. Specifically, creating a loan action in the BooksCon...
Here I want to show the extra attribute CONFIRMED from the employments join table. What am I doing wrong? class Job < ActiveRecord::Base has_many :employments, :dependent => :destroy has_many :users, :through => :employments class User < ActiveRecord::Base has_many :employments has_many :jobs, :through => :employments class Empl...
Let's say I have a Course in which Students can enroll via a Membership (e.g. a has_and_belongs_to_many relationsip of Courses and Students). Some memberships are for students who are just observing the class (not for credit, etc.), so: class Course < ActiveRecord::Base has_many :memberships has_many :students, :through...
class Job < ActiveRecord::Base has_many :employments, :dependent => :destroy has_many :users, :through => :employments class User < ActiveRecord::Base has_many :employments has_many :jobs, :through => :employments class Employment < ActiveRecord::Base belongs_to :job belongs_to :user # Employment has an extra attribute of confirm...
In my app I have the classes User, Video, and Vote. Users and Videos can relate to each other in two different ways: as a one-to-many or as a many-to-many. The former is when a User submits a Video (one user can submit many videos). The latter is when a user votes on a video (users have many videos through votes, and vice versa). H...
I want to (as an example) create a has_many association to all posts by friends of a person, something like has_many :remote_posts to give me something like person > friends > person > posts. ..here is how I would go about it script/generate model post title:string person_id:integer script/generate model friendship person_id:integer f...
I hope someone has already experienced this. Please help me, how can i solve this problem: class Article < ActiveRecord::Base belongs_to :author belongs_to :publisher has_one :address, :through => :publisher end class Author < ActiveRecord::Base has_many :articles has_many :addresses, :through => :articles, :source => :addres...
I was previously using has_and_belongs_to_many, and have converted to has_many :through. Here's how it looks for a list of games that can have many users playing. With this, I can do game.users and user.games....: class Game < ActiveRecord::Base has_many :game_users, :dependent => :destroy has_many :users, :through => :game_users, :...
I am still fairly new to rails and activerecord, so please excuse any oversights. I have 3 models that I'm trying to tie together (and a 4th to actually do the tying) to create a permission scheme using user-defined roles. class User < ActiveRecord::Base has_many :user_projects has_many :projects, :through => :user_projects has_m...