Added is_binding attribute to Goal

Fixed test_index to check for data rows only

lib/body_tracking/project_patch.rb

@@ -31,7 +31,7 @@ module BodyTracking::ProjectPatch
 
     has_many :goals, dependent: :destroy do
       def binding
-        find_or_create_by(name: "- binding -")
+        find_or_initialize_by(is_binding: true) { |g| g.name = "- binding -" }
       end
     end
     has_many :targets, through: :goals