instance method `foreign_key`

Ruby on Rails 4.0.13

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

foreign_key(class_name, separate_class_name_and_id_with_underscore = true)

Creates a foreign key name from a class name. separate_class_name_and_id_with_underscore sets whether the method should put ‘_’ between the name and ‘id’.

'Message'.foreign_key        # => "message_id"
'Message'.foreign_key(false) # => "messageid"
'Admin::Post'.foreign_key    # => "post_id"

Parameters

class_name req
separate_class_name_and_id_with_underscore opt = true

Source

# File activesupport/lib/active_support/inflector/methods.rb, line 198
    def foreign_key(class_name, separate_class_name_and_id_with_underscore = true)
      underscore(demodulize(class_name)) + (separate_class_name_and_id_with_underscore ? "_id" : "id")
    end

Defined in activesupport/lib/active_support/inflector/methods.rb line 198 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::Inflector

Signature

Parameters