Fix Canary Ingress weight is not reflected on UI immediately

This commit fixes the caching issue that the cached rollout status
is being used even after the entity is updated.

app/models/environment.rb

@@ -405,6 +405,11 @@ def patch_ingress(ingress, data)
     deployment_platform.patch_ingress(deployment_namespace, ingress, data)
   end
+  def clear_all_caches
+    expire_etag_cache
+    clear_reactive_cache!
+  end
+
   private
   def rollout_status_available?

app/services/environments/canary_ingress/update_service.rb

@@ -24,6 +24,7 @@ def execute(environment)
         end
         if environment.patch_ingress(canary_ingress, patch_data)
+          environment.clear_all_caches
           success
         else
           error(_('Failed to update the Canary Ingress.'), :bad_request)

changelogs/unreleased/fix-canary-update-service-to-invalidate-cache.yml

+---
+title: Fix Canary Ingress weight is not reflected on UI immediately
+merge_request: 50246
+author:
+type: fixed

spec/models/environment_spec.rb

@@ -1547,4 +1547,18 @@
       end
     end
   end
+
+  describe '#clear_all_caches' do
+    subject { environment.clear_all_caches }
+
+    it 'clears all caches on the environment' do
+      expect_next_instance_of(Gitlab::EtagCaching::Store) do |store|
+        expect(store).to receive(:touch).with(environment.etag_cache_key)
+      end
+
+      expect(environment).to receive(:clear_reactive_cache!)
+
+      subject
+    end
+  end
 end

spec/services/environments/canary_ingress/update_service_spec.rb

@@ -117,6 +117,12 @@
           expect(subject[:status]).to eq(:success)
           expect(subject[:message]).to be_nil
         end
+
+        it 'clears all caches' do
+          expect(environment).to receive(:clear_all_caches)
+
+          subject
+        end
       end
       context 'when patch request does not succeed' do