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Versions: 38
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Contents
# frozen_string_literal: true
module ActiveSupport
# = Actionable Errors
#
# Actionable errors lets you define actions to resolve an error.
#
# To make an error actionable, include the +ActiveSupport::ActionableError+
# module and invoke the +action+ class macro to define the action. An action
# needs a name and a block to execute.
module ActionableError
extend Concern
class NonActionable < StandardError; end
included do
class_attribute :_actions, default: {}
end
def self.actions(error) # :nodoc:
case error
when ActionableError, -> it { Class === it && it < ActionableError }
error._actions
else
{}
end
end
def self.dispatch(error, name) # :nodoc:
actions(error).fetch(name).call
rescue KeyError
raise NonActionable, "Cannot find action \"#{name}\""
end
module ClassMethods
# Defines an action that can resolve the error.
#
# class PendingMigrationError < MigrationError
# include ActiveSupport::ActionableError
#
# action "Run pending migrations" do
# ActiveRecord::Tasks::DatabaseTasks.migrate
# end
# end
def action(name, &block)
_actions[name] = block
end
end
end
end
Version data entries
38 entries across 38 versions & 6 rubygems