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Contents
module Trestle
class Resource
module AdapterMethods
extend ActiveSupport::Concern
# Adapter instance bound to the current resource's context.
def adapter
@adapter ||= adapter_class.new(self, @context)
end
module ClassMethods
# Declares a method that is handled by the admin's adapter class.
def adapter_method(name)
delegate name, to: :adapter
singleton_class.class_eval do
delegate name, to: :adapter
end
end
# Defines an admin-specific adapter method.
#
# The given block is wrapped rather than passed to #define_method directly, so that
# adapter methods can be defined with incomplete block parameters. Unfortunately
# this means we lose the ability to call super from within a custom adapter method.
def define_adapter_method(name, &block)
return unless block_given?
adapter_methods.module_eval do
define_method(name) do |*args|
instance_exec(*args, &block)
end
end
end
# Returns the adapter class for this admin.
#
# Defaults to a subclass of `Trestle.config.default_adapter` with
# the admin-specific adapter methods module included.
def adapter_class
@adapter_class ||= Class.new(Trestle.config.default_adapter).include(adapter_methods)
end
# Sets an explicit adapter class for this admin.
# A subclass is created with the admin-specific adapter methods module included.
def adapter_class=(klass)
@adapter_class = Class.new(klass).include(adapter_methods)
end
# Module container for admin-specific adapter methods.
def adapter_methods
@adapter_methods ||= Module.new
end
# Unbound instance of adapter.
def adapter
@adapter ||= adapter_class.new(self)
end
end
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems