ModelAttribute: Add `#code` method

A method that returns a string representation of the attribute, in the
form `:class#:name".

This will be used to store a reference to the attribute in the database.
For example, a validation will reference a `ModelAttribute` in a
database column using this `#code` string.

Refs #4401

1 files changed, 8 insertions, 0 deletions

diff --git a/spec/lib/model_attribute_spec.rb b/spec/lib/model_attribute_spec.rb
index da767cfed..ad1dd863f 100644
--- a/spec/lib/model_attribute_spec.rb
+++ b/spec/lib/model_attribute_spec.rb
@@ -13,4 +13,12 @@ RSpec.describe ModelAttribute do
       expect(model_attr.data_type).to eq(:string)
     end
   end
+
+  describe "#code" do
+    it "returns a string representation of the attribute" do
+      model_attr = ModelAttribute.new(:route, :name, :string)
+
+      expect(model_attr.code).to eq('route#name')
+    end
+  end
 end