CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3.1associations
zurik
zurik

Reputation: 513

deleting associatied models

I have the following model associations

Customer model

class Customer
   has_many :readings
   has_many :invoices
end

Reading Model

class Reading
  belongs_to :customer
 end

Invoice Model

class Invoice
   belongs_to :customer
   has_many :invoice_items
end

Invoice Items

class Invoiceitem
  belongs_to :invoice
end

Creating a destroy action in my customers_controller deletes the customer however, it leaves a lot of orphaned records making it had for me to call the show action on the invoices controller due to nil values.

How can I be able to delete a customer and all the associated records in the models?

Upvotes: 0

Views: 20

Answers (1)

Reuben Mallaby
Reuben Mallaby

Reputation: 5767

You can add :dependent => :destroy to the has_many

The API Documentation section Deleting from associations contains this example.

For example:

class Author
  has_many :posts, :dependent => :destroy
end
Author.find(1).destroy # => Will destroy all of the author's posts, too

Upvotes: 1

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