Extract a list of available data model's entities on RoR projects

Extract Entities List RoR proyects

 # This method reads all models that the project hash.
  # @return [Array] The proyect models list. 
  def self.load_models

     models = []   #All models will be in this list.
     models_valids = [] #This list is only to models with database table associated.
     mod = nil

     #Get all models in Model's folder
     Dir["#{RAILS_ROOT}/app/models/**/*.rb"].each do |file|
       models << file.gsub(RAILS_ROOT+'/app/models/',"").gsub('.rb','').classify
     end
     
     # Here, get the correct model's name: Singular or Plural
     models.each do |model|
       begin
         mod = eval model
         mod.columns
       rescue
         begin
           mod = eval model.pluralize
           mod.columns
         rescue
           mod = nil
         end
       end
       if mod
         models_valids << mod.to_s
       end
     end
   
     models_valids
  end