I\'m trying to read UML Class diagrams used to document design patterns. I understand aggregation and composition - and aggregation uses the open diamond and composition uses the filled diamond.
I\'m building a social network, and I\'m stucked in the friendship relation. These are my data: Table friendship:
I want to process nested JSON data sent from rails in Sencha. In rails, my model associations are: class User < ActiveRecord::Base
I think this is a stupid mistake… When i create a record, my \"resources\" and \"page_settings\" tables getting populated.
How can I get some model\'s objects and its associated model\'s objects conditionally through an intermediary model object? This will then be used to generate JSON (via to_json).
I have a model (Trip) that I want to have be related to others of its kind (other trips). The join model is used that stores the two trip_id values and a strength value (representing the strength of
In \'ROOT_RAILS/models/users/account.rb\' I have has_one :pro开发者_如何学Cfile, :primary_key => \"app_profile_id\",
class User < ActiveRecord::Base has_many :books has_many :book_users has_many :books, :through => :book_users
Here is my scenario: I have three models Subscriber, Subscription, Plan, with has_many :through relationship
Scenario: Example: A seller decides to sell a BMW. Before selling a particular model of the BMW (say a 7-series 760 Li) a CarSketch needs to be created by the seller. This CarSketch belongs to the BMW
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