similar to: Looking for a simpler model using :through associations

Hi, I have two model classes; Tune and Title and they are joined in a many to many relationship through a Variation class. Here''s some stub code of the models: class Tune < ActiveRecord::Base has_many :variations, :dependent => :destroy has_many :titles, :through => :variations ... class Title < ActiveRecord::Base has_many :variations, :dependent => :destroy

I tried to user delete_if on an association: class Group < ActiveRecord::Base has_many :memberships, :dependent => :destroy has_many :users, :through => :memberships ... end This is the controller method, trying to use delete_if. Although some elements are removed (s2 < s1), the save method does not update the association. def intersect_or_remove_group other_group =

hey, i have users who are in groups, and i have a search form, where i can search on group, user lastname, and user firstname. All this is also with pagination. these are my models class User < ActiveRecord::Base has_and_belongs_to_many :groups end class Group < ActiveRecord::Base has_and_belongs_to_many :users end in my controller i do this THIS works (but in need pagination) @users2

I?m following along a few tutorials on the web and trying to implement my own example, but I must be missing something because I can?t get has_many or belongs_to to work like I expected. now I have watched all the videos and made a cookbook several times with different interfaces. what I''m looking for is *not* a code snippet to solve something (because I already have that),

First, thanks to everyone who replied to my pluralization question from before! Today I''m confused by associations. I''ve set up a bunch of associations in my models to describe these relationships: - each user can have many bookmarks and tags - each bookmark can have many users and tags - each tag can have many bookmarks and users (Part of what is confusing is that I can

hey, i my database i have users and groups, each user can get in different groups my db structure: table groups: id, name, basegroup, firm_id table users: id, firstname, lastname, email table groups_users: group_id, user_id my relation is a many to many: class Group < ActiveRecord::Base has_and_belongs_to_many :users end class User < ActiveRecord::Base has_and_belongs_to_many

I''ve got a User model and a Book model. A user is required to submit books each month to be reviewed by other users. I have the following relationships defined: # the join model book_review.rb belongs_to :user belongs_to :book end book.rb # each book is reviewed by many users. This allows us to get the BookReview # objects associated with this book has_many :book_reviews,

Is there some sort of good pattern for dealing with computed values with Rails/ActiveRecord? A simple example: 3 tables, classes, students, and student_class_records (habtm style relation but contains a good deal of additional state so is modeled explicitly) Something like select the 10 classes with the most students. Easy enough in SQL. So I''m using a lot of find_by_sql and

I have users who belong to a group. I also have a room that belongs to a group. I want to use a has_many through association to link the room and the users as such: class Room < ActiveRecord::Base belongs_to :group has_many :users, :through => :group end The SQL generated for the search is incorrect: SELECT users.* FROM users INNER JOIN group ON users.group_id = groups.id WHERE

Today I face with incorrect behavior in ActiveRecord. It take place when I try to use :include parameter for .find method. Where are two typical cases: 1. You have record with self-referential joins CREATE TABLE keywords (id, group_id); class Keyword < ActiveRecord::Base belongs_to :group, :class_name => "Keyword", :foreign_key =>

My application has two models I''d like to have multiple join tables between, Users and Groups. Users have the ability to subscribe to a Group, while a Group would like to know its membership. Additionally, a User can administer several Groups and a Group should know about its several Administators (Users). I have the following declarations: class Administrator <

libvirt-3.0.0 When attemping to create a virtual machine I receive the error "error : Failed to switch root mount into slave mode: Permission denied”. I’m attempting to run qemu/libvirt/virt-manager in an Arch Linux lxc container on a Ubuntu 16.04 host. The host uses zfs for its containers. The arch container is set up as a priveleged container. I do already have kvm/qemu/libvirt working

My app has an association that''s got me scratching my head. I have Users, and Images. A User has many Images. (Yes, another picture sharing app, but it''s for a small niche, and it doesn''t end in -r!) I would like to express a "Favorite" relationship between both Users to Users, and Users to Images. This seems like the opposite of the standard

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

Hello, After listening to DHH''s 2006 RailsConf keynote, I decided to take a leap on my current application and do a little more re-organizing to make it more CRUD-based. As such, I ended up changing some things around to get this (simplified): User has_many :enrollments, :conditions => ''status > 0'' User has_many :schools, :through => :enrollments User has_many

Hi, I''ve been breaking my head over this thing with no success. Here is my table layout - class User < AR has_many :memberships has_many :groups, :through => :memberships ... class Group < AR has_many :memberships has_many :users, :through => :memberships ... class Membership < AR belongs_to :user, :class_name => "User", :foreign_key =>

I have 3 models that define members, groups and the subscriptions: Member, Group, and GroupMember. class Member < ActiveRecord::Base > has_many :group_subscriptions, class_name: "GroupMember" > has_many :groups, through: :group_subscriptions > attr_accessible :email, :password > end > class Group < ActiveRecord::Base > has_many :member_subscriptions,

This is really bugging me. How can I get a second association to work between 2 tables. I have two models, User and Article. A user has many articles, and an article belongs to one user. Then I have the "current article", which is a the article that the user is currently viewing/editing. I want to track/save this value, so they can come back to the same article if they log out

I am just getting started with Rails, don''t know any Ruby, and don''t quite even get object oriented programming yet. I have tweaked my schema to The Rails Way and have generated a bit of scaffolding. I am trying to create a new Part, which references a PartName and a PartNumber. I can create a PartNumber on the fly, but the PartName has to exist. I have an inelegant solution

I am just getting started with Rails, don''t know any Ruby, and don''t quite even get object oriented programming yet. I have tweaked my schema to The Rails Way and have generated a bit of scaffolding. I am trying to create a new Part, which references a PartName and a PartNumber. I can create a PartNumber on the fly, but the PartName has to exist. I have an inelegant solution