method

assign_attributes

v4.2.7 - Show latest stable - 1 note - Class: AttributeAssignment

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What's this?

assign_attributes(new_attributes) public

Allows you to set all the attributes by passing in a hash of attributes with keys matching the attribute names (which again matches the column names).

If the passed hash responds to permitted? method and the return value of this method is false an ActiveModel::ForbiddenAttributesError exception is raised.

cat = Cat.new(name: "Gorby", status: "yawning")
cat.attributes # =>  { "name" => "Gorby", "status" => "yawning", "created_at" => nil, "updated_at" => nil}
cat.assign_attributes(status: "sleeping")
cat.attributes # =>  { "name" => "Gorby", "status" => "sleeping", "created_at" => nil, "updated_at" => nil }

New attributes will be persisted in the database when the object is saved.

Aliased to attributes=.

Show source

# File activerecord/lib/active_record/attribute_assignment.rb, line 23
    def assign_attributes(new_attributes)
      if !new_attributes.respond_to?(:stringify_keys)
        raise ArgumentError, "When assigning attributes, you must pass a hash as an argument."
      end
      return if new_attributes.blank?

      attributes                  = new_attributes.stringify_keys
      multi_parameter_attributes  = []
      nested_parameter_attributes = []

      attributes = sanitize_for_mass_assignment(attributes)

      attributes.each do |k, v|
        if k.include?("(")
          multi_parameter_attributes << [ k, v ]
        elsif v.is_a?(Hash)
          nested_parameter_attributes << [ k, v ]
        else
          _assign_attribute(k, v)
        end
      end

      assign_nested_parameter_attributes(nested_parameter_attributes) unless nested_parameter_attributes.empty?
      assign_multiparameter_attributes(multi_parameter_attributes) unless multi_parameter_attributes.empty?
    end

September 5, 2012 - (v3.2.1 - v3.2.8)

1 thank

ActiveModel::MassAssignmentSecurity::Error

Note that in the example shown in the documentation, `user.assign_attributes({ :name => ‘Josh’, :is_admin => true })` would raise a `ActiveModel::MassAssignmentSecurity::Error` and would not actually update user.name, contrary to what the example seems to demonstrate.

assign_attributes

Related methods

ActiveModel::MassAssignmentSecurity::Error