Merge pull request #1219 from 3scale/fix-path-oracle

Cast nil values to empty string

app/lib/active_record/type/string_not_nil.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module ActiveRecord
+  module Type
+    class StringNotNil < ActiveRecord::Type::String
+      def type_cast(value)
+        return '' if value.blank?
+        super
+      end
+    end
+  end
+end

app/models/backend_api_config.rb

@@ -7,7 +7,7 @@ class BackendApiConfig < ApplicationRecord
   belongs_to :service, inverse_of: :backend_api_configs
   belongs_to :backend_api, inverse_of: :backend_api_configs
 
-  attribute :path, Type::String.new
+  attribute :path, ActiveRecord::Type::StringNotNil.new
 
   has_many :backend_api_metrics, through: :backend_api, source: :metrics
 

test/unit/lib/type_string_not_nil_test.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class TypeStringNotNilTest < ActiveSupport::TestCase
+  def test_type_cast_to_string_if_nil
+    type = ActiveRecord::Type::StringNotNil.new
+    assert_equal '', type.type_cast_from_database(nil)
+    assert_equal '', type.type_cast_from_user(nil)
+    assert_equal '', type.type_cast(nil)
+  end
+end