has-many

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delete Paperclip attachment unless it is the last one

I have a rails app with the follow code: class Rig < ActiveRecord::Base has_many :rig_pictures, :dependent => :destroy[详细]

2023-02-06 06:49 分类：问答
Dynamically typed associations with STI models

I have a parent model Account with multiple subclasses using STI. I want to associate another model Transaction using a belongs_to relationship to Account. The referenced account could be either an As[详细]

2023-02-06 00:37 分类：问答
Rails, finding object with multiple dates in has_many assocation

I\'m pretty new to Rails, and the problem I\'m bumping into is described as followes: First, there is a table with houses.[详细]

2023-02-04 19:22 分类：问答
Ruby on Rails Multiple has_many choice in form

I have two tables in my rails application Categories and Projects. The relationship between both 开发者_C百科is has_many both ways, meaning Project has_may Categories and Categories has_many Projects.[详细]

2023-02-04 17:22 分类：问答
Rails, using has_many through and fields_for

I have a little trouble getting this to work. class User < ActiveRecord::Base has_many :events, :through => :event_users[详细]

2023-02-04 10:30 分类：问答
rails - How do I set the id value of new record of model in has many/belongs to relationship?

I\'m trying to create a record开发者_StackOverflow中文版 that in in a has_many and belongs_to relationship[详细]

2023-01-31 18:12 分类：问答
Rails: Losing flash/errors from embedded form after redirect_to

This is a stupid example but I\'m trying to understand how thing get passed around behind the scenes in Rails. And there\'s probably a better, \"Rails\", way to approach this...if so please let me kno[详细]

2023-01-30 07:55 分类：问答
Rails3 scope with has_many association

I have two models, which are associated with has_many. class User < ActiveRecord::Base has_many :comments[详细]

2023-01-30 04:13 分类：问答
NHibernate Has Many Relationship with Grandchild Table Containing Multiple Many-to-One References

there are three existing tables defined like the following: create table business_units (id number(10,0) not null, ... , primary key (id))[详细]

2023-01-28 13:53 分类：问答
Ruby on Rails - has_many based on "kind"

I am new to Ruby on Rails, so I do not know so much about model association. But here is my problem: I have a project resource, which \"has_many :items\". Each item have a name and a kind (the kind s[详细]

2023-01-28 03:59 分类：问答