belongs-to | 易学教程

How to disable belongs_to :touch option in Rspec tests for Rails models?

阅读更多关于 How to disable belongs_to :touch option in Rspec tests for Rails models?

问题 Having a large model stack and using doll caching techniques extensively, one ends up with lots of parent models been "touched" after a model update. While testing, this seems to be a time waster unless you try to test that feature specifically. Is there a way to prevent models to touch their belongs_to associations for the test environment or at a test level? UPDATE 1: My first attempt to the case would be to # /config/initializers/extensions.rb # class ActiveRecord::Base def self.without

belongs_to belongs_to association only no has_many or has_one

阅读更多关于 belongs_to belongs_to association only no has_many or has_one

Can you have a belongs_to belongs_to relationship in Rails? Search results gave me two results. The fact that I can't find very much info on the subject, seems to indicate that it shouldn't be done or is bad practice. I asked yesterday about a has_many relationship, but thought because I couldn't find information on this, I would generate a question so it is easier for people to search for this in the future. I'm paraphrasing another users answer (I hope this is ok). A Shoe can have many Socks, but only one active Sock. Other Socks are inactive. All Socks are also unique with unique patterns.

CakePHP hasOne/belongsTo model relationship

阅读更多关于 CakePHP hasOne/belongsTo model relationship

问题 I have a few models I'm trying to relate. One model is Item , one is Slide , and another is Asset . Items have multiple slides beneath them. Assets are basically files that have been uploaded (images, mp3s, etc) and slides are where assets are displayed. Each slide has one asset, but a given asset might belong to multiple slides. A slide has an asset_id field defined. I currently have the models defined as: Slide class Slide extends AppModel { var $name = 'Slide'; var $order = array("Slide

can Belongs_to work without has_many or has_one

阅读更多关于 can Belongs_to work without has_many or has_one

I am studying Belongs_to association, I have used following models, in that every order belongs to the customer, so I have used belongs_to in order model it giving error while creating order undefined method `orders' for # when I use has_many :orders in customer model it works fine, why it does not work with only belongs_to Its work with has_many :orders in customer model but not with has_one : order in customer controller it giving same above error. thanks in advance. Model :- order.rb class Order < ActiveRecord::Base belongs_to :customer attr_accessible :order_date, :customer_id end Model :-

Rails multiple belongs_to assignment

阅读更多关于 Rails multiple belongs_to assignment

问题 Given User: class User < ActiveRecord::Base has_many :discussions has_many :posts end Discussions: class Discussion < ActiveRecord::Base belongs_to :user has_many :posts end Posts: class Post < ActiveRecord::Base belongs_to :user belongs_to :discussion end I am currently initializing Posts in the controller via @post = current_user.posts.build(params[:post]) My question is, how do I set/save/edit the @post model such that the relationship between the post and the discussion is also set? 回答1:

Grails: mapping column names of a field and a belongsTo of the same type

阅读更多关于 Grails: mapping column names of a field and a belongsTo of the same type

I'm trying to map the column names of this class: class Amount{ String total //Total amount of something String type //Type of amount, Dollars, %, Times something Bonification bonificationRate //the amount can be "x times another bonification" static belongsTo = [parentBonification: Bonification] static mapping = { table "AMOUNTS" total column: "AMOU_TTOTAL" type column: "AMOU_TTYPE" parentBonification column: "BONI_CID" bonificationRate column: "BONI_TRATE_CID" } } class Bonification { //among other things: Amount amount } The thing is none of the field with the Bonification class are created

ruby on rails - how to make relationship works in route, controller, view ? has_many, belongs_to

阅读更多关于 ruby on rails - how to make relationship works in route, controller, view ? has_many, belongs_to

I am struggling to get my relationship in rails to work. I have a User,Gallery,Comment model class Gallery has_many :comments belongs_to :user end class User has_many :comments has_many :galleries end class Comment belongs_to :gallery belongs_to :user end now what should i do in the routes, controller and views to link this all up ? please help me ? its quite confusing finding out the answers. If can, I dont want it to be nested like in the railscast, but i want for each model, eg gallery i can input user, eg comment i can find and input the galleryid and userid. Im totally lost in oblivion

Rails-y way to query a model with a belongs_to association

阅读更多关于 Rails-y way to query a model with a belongs_to association

问题 I have two models: class Wine belongs_to :region end class Region has_many :wines end I am attempting to use the #where method with a hash built from transforming certain elements from the params hash into a query hash, for example { :region => '2452' } def index ... @wines = Wine.where(hash) ... end But all I get is a column doesn't exist error when the query is executed: ActiveRecord::StatementInvalid: PGError: ERROR: column wines.region does not exist LINE 1: SELECT "wines".* FROM "wines"

Create association between two instancied objects

阅读更多关于 Create association between two instancied objects

I have two models: (Albums and Product) 1) Inside Models Inside album.rb: class Album < ActiveRecord::Base attr_accessible :name has_many :products end Inside product.rb: class Product < ActiveRecord::Base attr_accessible :img, :name, :price, :quantity belongs_to :album end 2) Using " rails console ", how can I set the associations (so I can use "<%= Product.first.album.name %>")? e.g. a = Album.create( :name => "My Album" ) p = Product.create( :name => "Shampoo X" ) # what's next? how can i set the album and the product together? You can do like this: a = Album.create( name: "My Album" ) p =

Form_For New Related Model

阅读更多关于 Form_For New Related Model

问题 So in my app I have a Person model which has_many Descriptions. I now need a form on each person's show page for to add a new description for that person. So far I have the following form. However it isn't passing the person's ID to the Description Create action. Form <%= form_for @person.descriptions.new do |f| %> <fieldset class="input"> <%= f.label :name %> <%= f.text_field :name %> </fieldset> <fieldset class="input"> <%= f.label :description %> <%= f.text_area :description %> </fieldset>