ruby on rails - How do I use the parser gem to extract this code snippet I want? -

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i stumbled across this parser gem.

what want extract specific method long file.

one example has_many method rails:

 def has_many(name, scope = nil, options = {}, &extension)     reflection = builder::hasmany.build(self, name, scope, options, &extension)     reflection.add_reflection self, name, reflection   end

the issue is, need able extract version of same method (from earlier time), more verbose , complex. version looks this:

def has_many(association_id, options = {})     validate_options([ :foreign_key, :class_name, :exclusively_dependent, :dependent, :conditions, :order, :finder_sql ], options.keys)     association_name, association_class_name, association_class_primary_key_name =           associate_identification(association_id, options[:class_name], options[:foreign_key])      require_association_class(association_class_name)      if options[:dependent] , options[:exclusively_dependent]       raise argumenterror, ':dependent , :exclusively_dependent mutually exclusive options.  may specify 1 or other.' # ' ruby-mode     elsif options[:dependent]       module_eval "before_destroy '#{association_name}.each { |o| o.destroy }'"     elsif options[:exclusively_dependent]       module_eval "before_destroy { |record| #{association_class_name}.delete_all(%(#{association_class_primary_key_name} = '\#{record.id}')) }"     end      define_method(association_name) |*params|       force_reload = params.first unless params.empty?       association = instance_variable_get("@#{association_name}")       if association.nil?         association = hasmanyassociation.new(self,           association_name, association_class_name,           association_class_primary_key_name, options)         instance_variable_set("@#{association_name}", association)       end       association.reload if force_reload       association     end      # deprecated api     deprecated_collection_count_method(association_name)     deprecated_add_association_relation(association_name)     deprecated_remove_association_relation(association_name)     deprecated_has_collection_method(association_name)     deprecated_find_in_collection_method(association_name)     deprecated_find_all_in_collection_method(association_name)     deprecated_create_method(association_name)     deprecated_build_method(association_name)   end

so how extract both of methods, using gem?

the readme gem not friendly complete parsing-noobs.


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