[UPDT] EMPLOYEE: Optimize email duplication check by excluding current instance during validation

employee/forms.py

@@ -194,19 +194,28 @@ class EmployeeForm(ModelForm):
     def clean(self):
         super().clean()
         email = self.cleaned_data["email"]
-        all_employees = Employee.objects.entire()
-        exit_employee = all_employees.filter(email=email).first()
+        query = Employee.objects.entire().filter(email=email)
+        if self.instance and self.instance.id:
+            query = query.exclude(id=self.instance.id)
+
+        existing_employee = query.first()
+
+        if existing_employee:
+            company_id = None
+            if (
+                hasattr(existing_employee, "employee_work_info")
+                and existing_employee.employee_work_info
+            ):
+                company_id = existing_employee.employee_work_info.company_id
 
-        if exit_employee:
-            company_id = getattr(
-                getattr(exit_employee, "employee_work_info", None), "company_id", None
-            )
             if company_id:
                 error_message = _(
-                    "Employee with this Email already exists in company {}"
-                ).format(company_id)
+                    "An Employee with this Email already exists in company {}".format(
+                        company_id
+                    )
+                )
             else:
-                error_message = _(f"Employee with this Email already exists")
+                error_message = _("An Employee with this Email already exists")
 
             raise forms.ValidationError({"email": error_message})