associations

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Migration a has_and_belongs_to_many join table don't create the table

I\'m develop a web app with Rails 3.0.9 and Postgres 9.4 I\'m trying to create a join table for a has_and_belongs_to_many association, but when execute \"rake db:migrate\" the only one not executed mi[详细]

2023-04-11 03:36 分类：问答
foreign key not populating in the table on create - rails 3

I have two models, \'product\' with \'belongs_to\' and \'category\' with \'has_many\'. Product has a foreign key \'category_id\'. And in the form product/_form I\'m trying to include category field wi[详细]

2023-04-10 22:50 分类：问答
join table and has_many relationships not working

I have two items, users and posts, and a join table linking them together.The two items have a has_many relationship with each other (:through the join table).I created the join table after creating t[详细]

2023-04-10 07:42 分类：问答
rails - habtm association not saving to database

Product controller: def update params[:product][:category_ids] ||= [] @product = Product.find(params[:id])[详细]

2023-04-10 01:47 分类：问答
Rails help with devise

Hey I was trying to make an association in devise so a user can just have a link to his association (like he can just click new post and he can make it) but i cant make it in devise like regular rails[详细]

2023-04-09 14:51 分类：问答
Rails nested models

hey I asked a question here Rails association help , this person directed me to learn nested attributes here , http://railscasts.com/episodes/196-nested-model-form-part-1 , and here http://ra开发者_如[详细]

2023-04-09 08:31 分类：问答
model association for a e-store app

I\'m developing an e-store app using ruby on rails and I\'m a bit confused about the model associations. It would help me if someone could give开发者_开发技巧 me an idea about the tables and their ass[详细]

2023-04-08 10:17 分类：问答
Patterns and Practices for Enforcing Object Association Cardinality

I\'ve been thinking about object-oriented principals / practices / paradigms such as SOLID, Law of Demeter, and DDD a lot lately and a theme that continues to surface is enforcing object cardinality.[详细]

2023-04-08 05:19 分类：问答
How can I get rid of this nasty query in my Rails view template?

Yuck. It\'s bringing me down. In my controller: @assessor = Assessor.find(params[:id]) @assessor.answers.build if @assessor.answers.empty?[详细]

2023-04-08 03:38 分类：问答
How should I use scope in Rails 3?

I have two models: First: class CountryList < ActiveRecord::Base has_one :country, :dependent => :nullify[详细]

2023-04-06 06:42 分类：问答