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Contents
module Para
class ComponentsCleaner
# Hide class instanciation
def self.run; new.run; end
def run
components.each do |component|
unless component == Para.components.component_for(component.identifier)
component.destroy
end
end
Para::ComponentSection.find_each do |section|
unless Para.components.section_for(section.identifier)
section.destroy
end
end
end
private
def components
Para::Component::Base.all.to_a
rescue ActiveRecord::SubclassNotFound => e
# When a subclass is not found, define it and try loading all components.
#
# Since we're probably about to destroy this class, this sould not
# produce errors for the end user
#
if (match = e.message.match(/the subclass: '([\w:]+)'/))
define_temporary_component_subclass(match[1])
return components
end
raise e
end
def define_temporary_component_subclass(subclass_name)
subclass_path = subclass_name.split('::')
subclass_path.each_with_index.each_with_object([]) do |(const_name, index), path|
parent_name = path.join('::').presence
begin
[parent_name, const_name].compact.join('::').constantize
rescue NameError
# Last iterated constnat is the actual component subclass, others must
# be modules namespacing the component class
object = if index == (subclass_path.length - 1)
Class.new(Para::Component::Base)
else
Module.new
end
parent = parent_name ? parent_name.constantize : Object
# Define module or class in parent namespace
parent.const_set(const_name, object)
end
# Add const name to the path to allow namespaced constants to be
# defined in next loop iteration
path << const_name
end
end
end
end
Version data entries
42 entries across 42 versions & 1 rubygems