CODEWITHSUNDEEP
ruby-on-rails
Muhammad Awais
Muhammad Awais

Reputation: 15

Ruby on Rails model Confusion

I came across the following code which is beyond my understating. I'm working hard to grasp it completely from previous 3 days but couldn't. 

class TestUser < ActiveRecord::Base
   self.table_name = 'garden'

   belongs_to :account
   accepts_nested_attributes_for :garden

The entire above code is not understandable for me.

Upvotes: 0

Views: 38

Answers (1)

Prakash Murthy
Prakash Murthy

Reputation: 13067

class TestUser < ActiveRecord::Base
   self.table_name = 'garden'
   authenticates_with_sorcery!

   belongs_to :account
   accepts_nested_attributes_for :garden

Breaking it down line by line:

class TestUser < ActiveRecord::Base

This is defining a class called TestUser which is inherited from ActiveRecord::Base. All models in rails connected to active record (i.e. having a database table) have the same signature. Inheriting from ActiveRecord::Base provide TestUser model with some magical abilities. Read more about it at http://guides.rubyonrails.org/active_record_basics.html

self.table_name = 'garden'

This line is saying that the table that TestUser model should connect to is garden. By default TestUser model is linked to test_users table. This line is changing that behavior.

Actually, it should be gardens as all table names should be plural; gardens table is for storing information about many garden objects.

Read about table_name at http://apidock.com/rails/ActiveRecord/ModelSchema/ClassMethods/table_name

authenticates_with_sorcery!

This line says the system uses sorcery gem for authentication. Learn more about it at http://railscasts.com/episodes/283-authentication-with-sorcery

belongs_to :account

This line is saying that the TestUser object has a belongs_to relationship with Account model. With this relationship in place, you can find a test_user's account with the test_user.account method. This is assuming test_user is an instance of TestUser model. i.e. test_user = TestUser.new. Read more about belongs_to association at http://guides.rubyonrails.org/association_basics.html#the-belongs-to-association

accepts_nested_attributes_for :garden

This line says that you can save attributes on Garden object when you are saving a TestUser object. Read more about accepts_nested_attributes_for at http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html

Finally a piece of advice to help you understand everything better in rails world: Go through a thorough rails tutorial to get a good understanding of rails concepts. The freely available Rails Tutorial book at https://www.railstutorial.org/book is highly recommended.

Upvotes: 1

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