extracted method

app/models/code_ocean/file.rb

@@ -2,6 +2,8 @@ require File.expand_path('../../../uploaders/file_uploader', __FILE__)
 
 module CodeOcean
   class File < ActiveRecord::Base
+    include DefaultValues
+
     DEFAULT_WEIGHT = 1.0
     ROLES = %w(main_file reference_implementation regular_file teacher_defined_test user_defined_file user_defined_test)
     TEACHER_DEFINED_ROLES = ROLES - %w(user_defined_file)
@@ -74,10 +76,8 @@ module CodeOcean
     private :set_ancestor_values
 
     def set_default_values
-      self.content ||= ''
-      self.hidden ||= false
-      self.read_only ||= false
-      self.weight ||= DEFAULT_WEIGHT if teacher_defined_test?
+      set_default_values_if_present(content: '', hidden: false, read_only: false)
+      set_default_values_if_present(weight: DEFAULT_WEIGHT) if teacher_defined_test?
     end
     private :set_default_values
 

app/models/concerns/default_values.rb

@@ -0,0 +1,8 @@
+module DefaultValues
+  def set_default_values_if_present(options = {})
+    options.each do |attribute, value|
+      send(:"#{attribute}=", send(:"#{attribute}") || value) if has_attribute?(attribute)
+    end
+  end
+  private :set_default_values_if_present
+end

app/models/execution_environment.rb

@@ -1,5 +1,6 @@
 class ExecutionEnvironment < ActiveRecord::Base
   include Creation
+  include DefaultValues
 
   VALIDATION_COMMAND = 'whoami'
 
@@ -20,8 +21,7 @@ class ExecutionEnvironment < ActiveRecord::Base
   validates :run_command, presence: true
 
   def set_default_values
-    self.permitted_execution_time ||= 60 if has_attribute?(:permitted_execution_time)
-    self.pool_size ||= 0 if has_attribute?(:pool_size)
+    set_default_values_if_present(permitted_execution_time: 60, pool_size: 0)
   end
   private :set_default_values
 

app/models/exercise.rb

@@ -1,6 +1,7 @@
 class Exercise < ActiveRecord::Base
   include Context
   include Creation
+  include DefaultValues
 
   after_initialize :generate_token
   after_initialize :set_default_values
@@ -47,7 +48,7 @@ class Exercise < ActiveRecord::Base
   end
 
   def set_default_values
-    self.public ||= false
+    set_default_values_if_present(public: false)
   end
   private :set_default_values
 

app/models/file_type.rb

@@ -1,5 +1,6 @@
 class FileType < ActiveRecord::Base
   include Creation
+  include DefaultValues
 
   AUDIO_FILE_EXTENSIONS = %w(.aac .flac .m4a .mp3 .ogg .wav .wma)
   IMAGE_FILE_EXTENSIONS = %w(.bmp .gif .jpeg .jpg .png)
@@ -24,9 +25,7 @@ class FileType < ActiveRecord::Base
   end
 
   def set_default_values
-    self.binary ||= false if has_attribute?(:binary)
-    self.executable ||= false if has_attribute?(:executable)
-    self.renderable ||= false if has_attribute?(:renderable)
+    set_default_values_if_present(binary: false, executable: false, renderable: false)
   end
   private :set_default_values