belongs-to

问题 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

问题 I have three models: User, Product, Offer and a problem with the relationship between these models. Scenario: User 1 posts a product User 2 can send User 1 an offer with an price e.g $ 10 User 1 can accept or reject the offer My questions are now: What is the right relationship between User, Product and Offer? How can I handle those "accept or reject" actions? Is there maybe a better solution? User model: class User < ActiveRecord::Base attr_accessible :name, :email, :password, :password

问题 I am having a hell of a time getting my association to work here. every time I run the view action on the Events controller, and use var_dump, I just get back the event info, and no company info, it's like its ignoring my association all together, and whats even more annoying is there is no error messages. the Events table has a field called Company_ID, and the Companies table has an ID field. (yes upper case Company_ID, and ID). class Event extends AppModel{ public $name = "Events"; //

问题 From the CakePHP manual: Let's say you had a belongsTo relationship between Posts and Authors. Let's say you wanted to find all the posts that contained a certain keyword ("magic") or were created in the past two weeks, but you want to restrict your search to posts written by Bob: array ( "Author.name" => "Bob", "OR" => array ( "Post.title LIKE" => "%magic%", "Post.created >" => date('Y-m-d', strtotime("-2 weeks")) ) ) However, its not working for me. I've got Scrapes belongsTo Vargroup, and

问题 I'm sur I do it wrong, but I can't see where. I've got this two models : Subscription.rb (child) class Subscription < ActiveRecord::Base attr_accessible :state, :subscriber_id, :subscriber_type, :last_payment belongs_to :subscriber, polymorphic: true validates :subscriber_id, presence: true validates :subscriber_type, presence: true end restorer.rb (Parent) class Restorer < User attr_accessible :firstname, :lastname, :restaurant_attributes, :subscription_attributes has_one :restaurant,

问题 Below is a posts model, and as you can see I have a belongsTo relationship on each post, so that the user details are also retrieved with the post. I would also like the exact same behaviour for the Posts.Children (see the hasMany definition below). QUESTION: How do I also apply the belongsTo relationship to the Posts.Children ( Posts.Child belongsTo User )?? <?php class Post extends AppModel { var $name = 'Post'; var $belongsTo = array( 'User' => array( 'className' => 'User', 'foreignKey' =>

问题 I use Cakephp framework, and I have problem with my association. How create belong to association in models in cake php. When I use belongto and hasMany in my model. Can I find sample model to view this example? 回答1: Simple belongsTo association: <?php class Profile extends AppModel { var $name = 'Profile'; var $belongsTo = array( 'User' => array( 'className' => 'User', 'foreignKey' => 'user_id' ) ); } ?> Simple hasMany association: <?php class User extends AppModel { var $name = 'User'; var

问题 I have a User entity that has a Current Location field (city and country). To hold this info I created an entity called Location which has_many Users. I'm not entirely sure if I should put in the User model "has_one" or "belongs_to", but for what I read if I wanted it to have the foreign key of the location I should put "belongs_to". I also want to be able to edit the user's Current Location when editing the User. so I am using nested attributes. But when I edit the user I end up adding a new

问题 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

问题 Banging my head with this one, I've asked something similar, but getting nowhere with it. So I have three tables Superheros, Powers, and Teams. A superhero can have many powers and many teams, a power can relate to many superheros, and a team consists of many superheros. I've decided to save these to a big relationship table (which I call Marvel) Here's what I have set up: class Superhero < ActiveRecord::Base attr_accessible :name, :power_ids, :team_ids, :attributes_marvels has_many :marvels,