class RuboCop::Cop::Rails::AttributeDefaultBlockValue

This cop looks for `attribute` class methods that specify a `:default` option which value is an array, string literal or method call without a block. It will accept all other values, such as string, symbol, integer and float literals as well as constants.

@example

# bad
class User < ApplicationRecord
  attribute :confirmed_at, :datetime, default: Time.zone.now
end

# good
class User < ApplicationRecord
  attribute :confirmed_at, :datetime, default: -> { Time.zone.now }
end

# bad
class User < ApplicationRecord
  attribute :roles, :string, array: true, default: []
end

# good
class User < ApplicationRecord
  attribute :roles, :string, array: true, default: -> { [] }
end

# bad
class User < ApplicationRecord
  attribute :configuration, default: {}
end

# good
class User < ApplicationRecord
  attribute :configuration, default: -> { {} }
end

# good
class User < ApplicationRecord
  attribute :role, :string, default: :customer
end

# good
class User < ApplicationRecord
  attribute :activated, :boolean, default: false
end

# good
class User < ApplicationRecord
  attribute :login_count, :integer, default: 0
end

# good
class User < ApplicationRecord
  FOO = 123
  attribute :custom_attribute, :integer, default: FOO
end

Constants

MSG
RESTRICT_ON_SEND
TYPE_OFFENDERS

Public Instance Methods

on_send(node) click to toggle source
# File lib/rubocop/cop/rails/attribute_default_block_value.rb, line 75
def on_send(node)
  default_attribute(node) do |attribute|
    value = attribute.children.last
    return unless TYPE_OFFENDERS.any?(value.type)

    add_offense(value) do |corrector|
      expression = default_attribute(node).children.last

      corrector.replace(value, "-> { #{expression.source} }")
    end
  end
end