[WIP] Customizable uneditable attributes

lib/upmin/attribute.rb

@@ -29,19 +29,9 @@ def type
     end
 
     def editable?
-      case name.to_sym
-      when :id
-        return false
-      when :created_at
-        return false
-      when :created_on
-        return false
-      when :updated_at
-        return false
-      when :updated_on
+      if model.uneditable_attributes.include? name
         return false
       else
-        # TODO(jon): Add a way to declare which attributes are editable and which are not later.
         return model.respond_to?("#{name}=")
       end
     end

lib/upmin/model.rb

@@ -50,6 +50,12 @@ def attributes
       return @attributes
     end
 
+    def uneditable_attributes
+      return @uneditable_attributes if defined?(@uneditable_attributes)
+      @uneditable_attributes = self.class.uneditable_attributes
+      return @uneditable_attributes
+    end
+
     def associations
       return @associations if defined?(@associations)
       @associations = []
@@ -189,6 +195,10 @@ def Model.search_path
       return Upmin::Engine.routes.url_helpers.upmin_search_path(klass: model_class_name)
     end
 
+    def Model.default_uneditable_attributes
+      return [:id, :created_at, :created_on, :updated_at, :updated_on]
+    end
+
     def Model.color
       return @color if defined?(@color)
       @color = Model.next_color
@@ -258,6 +268,18 @@ def Model.attributes(*attributes)
       return (@attributes + @extra_attrs).uniq
     end
 
+    # Sets the uneditable attributes to the provided attributes merged with the
+    # default uneditable attributes.
+    def Model.uneditable_attributes(*uneditable_attributes)
+      @uneditable_attributes = [] unless defined?(@uneditable_attributes)
+
+      if uneditable_attributes.any?
+        @uneditable_attributes = uneditable_attributes.map{|a| a.to_sym}
+      end
+
+      return (default_uneditable_attributes + @uneditable_attributes).uniq
+    end
+
     # Add a single action to upmin actions. If this is called
     # before upmin_actions the actions will not include any defaults
     # actions.