method

has_attribute?

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: ActiveRecord::AttributeMethods

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What's this?

has_attribute?(attr_name) public

Returns true if the given attribute is in the attributes hash, otherwise false.

class Person < ActiveRecord::Base
  alias_attribute :new_name, :name
end

person = Person.new
person.has_attribute?(:name)     # => true
person.has_attribute?(:new_name) # => true
person.has_attribute?('age')     # => true
person.has_attribute?(:nothing)  # => false

Show source

# File activerecord/lib/active_record/attribute_methods.rb, line 313
    def has_attribute?(attr_name)
      attr_name = attr_name.to_s
      attr_name = self.class.attribute_aliases[attr_name] || attr_name
      @attributes.key?(attr_name)
    end

has_attribute?

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