chore: Move Enterprise pricing validation to on create (#8856)

* chore: Move Pricing validation to on create

The previous validation was getting triggered on all transactions,
this would prevent login to existing users and session data need to be updated.
Opting for a less intrusive approach.

* chore: minore change

enterprise/app/models/enterprise/concerns/user.rb

@@ -2,7 +2,7 @@ module Enterprise::Concerns::User
   extend ActiveSupport::Concern
 
   included do
-    before_validation :ensure_installation_pricing_plan_quantity
+    before_validation :ensure_installation_pricing_plan_quantity, on: :create
   end
 
   def ensure_installation_pricing_plan_quantity

spec/enterprise/models/user_spec.rb

@@ -3,9 +3,10 @@
 require 'rails_helper'
 
 RSpec.describe User do
-  let(:user) { create(:user) }
+  let!(:user) { create(:user) }
 
   describe 'before validation for pricing plans' do
+    let!(:existing_user) { create(:user) }
     let(:new_user) { build(:user) }
 
     context 'when pricing plan is not premium' do
@@ -26,24 +27,36 @@
       end
 
       context 'when the user limit is reached' do
-        it 'adds an error to the user' do
+        it 'adds an error when trying to create a user' do
           allow(ChatwootHub).to receive(:pricing_plan_quantity).and_return(1)
-          user.valid?
-          expect(user.errors[:base]).to include('User limit reached. Please purchase more licenses from super admin')
+          new_user.valid?
+          expect(new_user.errors[:base]).to include('User limit reached. Please purchase more licenses from super admin')
+        end
+
+        it 'will not add error when trying to update a existing user' do
+          allow(ChatwootHub).to receive(:pricing_plan_quantity).and_return(1)
+          existing_user.update(name: 'new name')
+          # since there is user and existing user, we are already over limits
+          existing_user.valid?
+          expect(existing_user.errors[:base]).to be_empty
         end
       end
 
       context 'when the user limit is not reached' do
         it 'does not add an error to the user' do
-          allow(ChatwootHub).to receive(:pricing_plan_quantity).and_return(2)
-          user.valid?
+          allow(ChatwootHub).to receive(:pricing_plan_quantity).and_return(3)
+          new_user.valid?
           expect(user.errors[:base]).to be_empty
         end
       end
     end
   end
 
   describe 'audit log' do
+    before do
+      create(:user)
+    end
+
     context 'when user is created' do
       it 'has no associated audit log created' do
         expect(Audited::Audit.where(auditable_type: 'User', action: 'create').count).to eq 0