Fix #19173

app/controllers/api/v1/admin/domain_allows_controller.rb

@@ -19,12 +19,8 @@ class Api::V1::Admin::DomainAllowsController < Api::BaseController
   def create
     authorize :domain_allow, :create?
 
-    @domain_allow = DomainAllow.find_by(resource_params)
-
-    if @domain_allow.nil?
-      @domain_allow = DomainAllow.create!(resource_params)
-      log_action :create, @domain_allow
-    end
+    @domain_allow = DomainAllow.create!(resource_params)
+    log_action :create, @domain_allow
 
     render json: @domain_allow, serializer: REST::Admin::DomainAllowSerializer
   end

spec/controllers/api/v1/admin/domain_allows_controller_spec.rb

@@ -126,5 +126,15 @@ RSpec.describe Api::V1::Admin::DomainAllowsController, type: :controller do
         expect(response).to have_http_status(422)
       end
     end
+
+    context 'with no domain name' do
+      before do
+        post :create
+      end
+
+      it 'returns http unprocessable entity' do
+        expect(response).to have_http_status(422)
+      end
+    end
   end
 end