FIX: show invite validation error message in response

app/controllers/invites_controller.rb

@@ -76,7 +76,7 @@ class InvitesController < ApplicationController
       else
         render json: failed_json, status: 422
       end
-    rescue Invite::UserExists => e
+    rescue Invite::UserExists, ActiveRecord::RecordInvalid => e
       render json: {errors: [e.message]}, status: 422
     end
   end

spec/controllers/invites_controller_spec.rb

@@ -74,6 +74,8 @@ describe InvitesController do
         invite.reload
         post :create, email: invite.email
         expect(response).not_to be_success
+        json = JSON.parse(response.body)
+        expect(json["failed"]).to be_present
       end
 
       it "allows admins to invite to groups" do
@@ -91,6 +93,14 @@ describe InvitesController do
         post :create, email: invite.email
         expect(response).to be_success
       end
+
+      it "responds with error message in case of validation failure" do
+        log_in(:admin)
+        post :create, email: "test@mailinator.com"
+        expect(response).not_to be_success
+        json = JSON.parse(response.body)
+        expect(json["errors"]).to be_present
+      end
     end
 
   end