Add skip_validation attribute to metric definition

Use each instead of map

config/metrics/schema.json

@@ -55,6 +55,9 @@
         "type": "string",
         "enum": ["free", "starter", "premium", "ultimate", "bronze", "silver", "gold"]
       }
+    },
+    "skip_validation": {
+      "type": "boolean"
     }
   }
 }

lib/gitlab/usage/metric_definition.rb

@@ -22,8 +22,10 @@ module Gitlab
       end
 
       def validate!
-        self.class.schemer.validate(attributes.stringify_keys).map do |error|
-          Gitlab::ErrorTracking.track_and_raise_for_dev_exception(Metric::InvalidMetricError.new("#{error["details"] || error['data_pointer']} for `#{path}`"))
+        unless skip_validation?
+          self.class.schemer.validate(attributes.stringify_keys).each do |error|
+            Gitlab::ErrorTracking.track_and_raise_for_dev_exception(Metric::InvalidMetricError.new("#{error["details"] || error['data_pointer']} for `#{path}`"))
+          end
         end
       end
 
@@ -78,6 +80,12 @@ module Gitlab
       def method_missing(method, *args)
         attributes[method] || super
       end
+
+      def skip_validation?
+        return false if attributes[:skip_validation].blank?
+
+        attributes[:skip_validation]
+      end
     end
   end
 end

spec/lib/gitlab/usage/metric_definition_spec.rb

@@ -65,6 +65,12 @@ RSpec.describe Gitlab::Usage::MetricDefinition do
 
         described_class.new(path, attributes).validate!
       end
+
+      it 'does not raise exception if has skip_validation: true' do
+        expect(Gitlab::ErrorTracking).not_to receive(:track_and_raise_for_dev_exception)
+
+        described_class.new(path, attributes.merge( { skip_validation: true } )).validate!
+      end
     end
   end