Catch exception when creating accounts with email address already in use

core/forms/profiles.py

@@ -22,6 +22,16 @@ class AdminEditForm(ModelForm):
         model = get_user_model()
         fields = ('first_name', 'last_name', "display_name", "email", 'mobile', "role", "image", "remove_image")
 
+    def __init__(self, *args, **kwargs):
+        self.current_email = kwargs.pop('current_email')
+        super().__init__(*args, **kwargs)
+
+    def clean(self):
+        cleaned_data = super().clean()
+
+        if cleaned_data["email"] != self.current_email and get_user_model().objects.filter(username=cleaned_data["email"]):
+            self.add_error("email", _("An account with this email address already exists!"))
+
 class AdminCreateForm(ModelForm):
     display_name = CharField(required=False, label=_('Internal Display Name'))
     mobile = PhoneNumberField(required=False, label=_('Mobile Number'))
@@ -32,6 +42,12 @@ class AdminCreateForm(ModelForm):
         model = get_user_model()
         fields = ('first_name', 'last_name', "display_name", "email", 'mobile', "role", "image")
 
+    def clean(self):
+        cleaned_data = super().clean()
+
+        if get_user_model().objects.filter(username=cleaned_data["email"]):
+            self.add_error("email", _("An account with this email address already exists!"))
+
 class ClientEditForm(ModelForm):
     company = CharField(required=False, label=_('Company Name'))
     mobile = PhoneNumberField(required=False, label=_('Mobile Number'))
@@ -53,6 +69,16 @@ class ClientEditForm(ModelForm):
         model = get_user_model()
         fields = ('first_name', 'last_name', "company", "email", 'mobile', 'address1', 'address2', 'zip', 'city', 'state', 'country', 'vat_id', 'company_id', 'default_currency', 'brands', 'client_groups', 'marketing_opt_in', 'pgp_key')
 
+    def __init__(self, *args, **kwargs):
+        self.current_email = kwargs.pop('current_email')
+        super().__init__(*args, **kwargs)
+
+    def clean(self):
+        cleaned_data = super().clean()
+
+        if cleaned_data["email"] != self.current_email and get_user_model().objects.filter(username=cleaned_data["email"]):
+            self.add_error("email", _("An account with this email address already exists!"))
+
 class ClientCreateForm(ModelForm):
     company = CharField(required=False, label=_('Company Name'))
     mobile = PhoneNumberField(required=False, label=_('Mobile Number'))
@@ -74,3 +100,9 @@ class ClientCreateForm(ModelForm):
     class Meta:
         model = get_user_model()
         fields = ('first_name', 'last_name', "company", "email", 'mobile', 'address1', 'address2', 'zip', 'city', 'state', 'country', 'vat_id', 'company_id', 'default_currency', 'brands', 'client_groups', 'marketing_opt_in', 'pgp_key', 'send_password')
+
+    def clean(self):
+        cleaned_data = super().clean()
+
+        if get_user_model().objects.filter(username=cleaned_data["email"]):
+            self.add_error("email", _("An account with this email address already exists!"))

core/views/backend/profiles.py

@@ -30,6 +30,11 @@ class AdminEditView(BackendFormView):
         context["title"] = "Edit Administrator"
         return context
 
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs.update({'current_email': ClientProfile.objects.get(id=self.kwargs["pk"]).user.username})
+        return kwargs
+
     def get_initial(self):
         initial = super().get_initial()
         admin = get_user_model().objects.get(id=self.kwargs["pk"])
@@ -128,6 +133,11 @@ class ClientEditView(BackendFormView):
         context["title"] = "Edit Client"
         return context
 
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs.update({'current_email': ClientProfile.objects.get(id=self.kwargs["pk"]).user.username})
+        return kwargs
+
     def get_initial(self):
         initial = super().get_initial()
         client = ClientProfile.objects.get(id=self.kwargs["pk"]).user