has-many-through

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How should I get my model's instances to belong to all users in my user model?

I have the following setup and I want to ensure that all brands in my brand model belong to all users in my user model. I would also like to ensure that once a brand has been created, and it belongs t[详细]

2023-04-01 14:48 分类：问答
How to populate fields in a has_many through join table

I have a question concerning active record association, referring to this part of the rails documentation:[详细]

2023-03-30 18:30 分类：问答
Rails Tagging: Find Tags by number of occurances

I have a fairly simple tagging model in my app. Photo has_many :taggings Photo has_many :tags, :through => :taggings[详细]

2023-03-30 10:35 分类：问答
Why is my has_many through associated record (sometimes) readonly?

I have three ActiveRecord models: Partner, MembershipChannel (which is an STI model, inheriting from Channel) and ChannelMembership (I was not responsible for naming these models…)[详细]

2023-03-29 11:23 分类：问答
how to emulate has_many :through with polymorphic classes

I understand why ActiveRecord can\'t support has_many :through on polymorphic classes.But I would like to emulate some of its functionality.Consider the following, where a join table associates two 开[详细]

2023-03-29 07:49 分类：问答
Rails has_many :through with conditions and building associations

I\'m having problems building an association that is a has_many :through with conditions.I have this model:[详细]

2023-03-28 10:00 分类：问答
RoR Search based on many to many association such as tags

I have built a RoR database with several different models.Each \"record\" has many taggings and also is put into a category by a \"cat_id.\" I have built all the models, but I need help with filtering[详细]

2023-03-28 02:17 分类：问答
Rails: Why "has_many ..., :through => ..." association results in "NameError: uninitialized constant ..."

To express that a group can have multiple users, and a user can belong to multiple groups, I开发者_开发百科 set the following associations:[详细]

2023-03-27 21:43 分类：问答
has_many through build

I have two models. User and Account as follows class Account < ActiveRecord::Base has_many :manages has_many :users, :through => :manages[详细]

2023-03-27 20:22 分类：问答
Nested forms in Rails using has_many :through

I am having trouble figuring out how to make a nested form using a has_many :through relationship. I used this Railscast and I took at look at this tutorial and lots of the questions on Stack Overflow[详细]

2023-03-27 04:32 分类：问答