Issue #48: WIP

Added 'USER_VERIFICATION_ID_FIELD' setting key

rest_registration/api/views/register.py

@@ -13,7 +13,11 @@
 from rest_registration.notifications import send_verification_notification
 from rest_registration.settings import registration_settings
 from rest_registration.utils.responses import get_ok_response
-from rest_registration.utils.users import get_user_by_id, get_user_setting
+from rest_registration.utils.users import (
+    get_user_by_verification_id,
+    get_user_setting,
+    get_user_verification_id
+)
 from rest_registration.utils.verification import verify_signer_or_bad_request
 from rest_registration.verification import URLParamsSigner
 
@@ -30,8 +34,8 @@ def get_valid_period(self):
 
     def _calculate_salt(self, data):
         if registration_settings.REGISTER_VERIFICATION_ONE_TIME_USE:
-            user_id = data['user_id']
-            user = get_user_by_id(user_id, require_verified=False)
+            user = get_user_by_verification_id(
+                data['user_id'], require_verified=False)
             # Use current user verification flag as a part of the salt.
             # If the verification flag gets changed, then assume that
             # the change was caused by previous verification and the signature
@@ -77,7 +81,7 @@ def register(request):
 
     if registration_settings.REGISTER_VERIFICATION_ENABLED:
         signer = RegisterSigner({
-            'user_id': user.pk,
+            'user_id': get_user_verification_id(user),
         }, request=request)
         template_config = (
             registration_settings.REGISTER_VERIFICATION_EMAIL_TEMPLATES)
@@ -117,7 +121,7 @@ def process_verify_registration_data(input_data):
     verify_signer_or_bad_request(signer)
 
     verification_flag_field = get_user_setting('VERIFICATION_FLAG_FIELD')
-    user = get_user_by_id(data['user_id'], require_verified=False)
+    user = get_user_by_verification_id(data['user_id'], require_verified=False)
     setattr(user, verification_flag_field, True)
     user.save()
 

rest_registration/api/views/register_email.py

@@ -10,7 +10,11 @@
 from rest_registration.notifications import send_verification_notification
 from rest_registration.settings import registration_settings
 from rest_registration.utils.responses import get_ok_response
-from rest_registration.utils.users import get_user_by_id, get_user_setting
+from rest_registration.utils.users import (
+    get_user_by_verification_id,
+    get_user_setting,
+    get_user_verification_id
+)
 from rest_registration.utils.verification import verify_signer_or_bad_request
 from rest_registration.verification import URLParamsSigner
 
@@ -46,7 +50,7 @@ def register_email(request):
         registration_settings.REGISTER_EMAIL_VERIFICATION_EMAIL_TEMPLATES)
     if registration_settings.REGISTER_EMAIL_VERIFICATION_ENABLED:
         signer = RegisterEmailSigner({
-            'user_id': user.pk,
+            'user_id': get_user_verification_id(user),
             'email': email,
         }, request=request)
         send_verification_notification(
@@ -88,6 +92,6 @@ def process_verify_email_data(input_data):
     verify_signer_or_bad_request(signer)
 
     email_field = get_user_setting('EMAIL_FIELD')
-    user = get_user_by_id(data['user_id'])
+    user = get_user_by_verification_id(data['user_id'])
     setattr(user, email_field, data['email'])
     user.save()

rest_registration/api/views/reset_password.py

@@ -13,7 +13,10 @@
 from rest_registration.notifications import send_verification_notification
 from rest_registration.settings import registration_settings
 from rest_registration.utils.responses import get_ok_response
-from rest_registration.utils.users import get_user_by_id
+from rest_registration.utils.users import (
+    get_user_by_verification_id,
+    get_user_verification_id
+)
 from rest_registration.utils.verification import verify_signer_or_bad_request
 from rest_registration.verification import URLParamsSigner
 
@@ -30,8 +33,8 @@ def get_valid_period(self):
 
     def _calculate_salt(self, data):
         if registration_settings.RESET_PASSWORD_VERIFICATION_ONE_TIME_USE:
-            user_id = data['user_id']
-            user = get_user_by_id(user_id, require_verified=False)
+            user = get_user_by_verification_id(
+                data['user_id'], require_verified=False)
             # Use current user password hash as a part of the salt.
             # If the password gets changed, then assume that the change
             # was caused by previous password reset and the signature
@@ -61,7 +64,7 @@ def send_reset_password_link(request):
     if not user:
         raise UserNotFound()
     signer = ResetPasswordSigner({
-        'user_id': user.pk,
+        'user_id': get_user_verification_id(user),
     }, request=request)
 
     template_config = (
@@ -100,7 +103,7 @@ def process_reset_password_data(input_data):
     signer = ResetPasswordSigner(data)
     verify_signer_or_bad_request(signer)
 
-    user = get_user_by_id(data['user_id'], require_verified=False)
+    user = get_user_by_verification_id(data['user_id'], require_verified=False)
     try:
         validate_password(password, user=user)
     except ValidationError as exc:

rest_registration/settings_fields.py

@@ -43,6 +43,17 @@ def __new__(cls, name, *, default=None, help=None, import_string=False):
         'USER_EMAIL_FIELD',
         default='email',
     ),
+    Field(
+        'USER_VERIFICATION_ID_FIELD',
+        default='pk',
+        help=dedent("""\
+            Field used in verification, as part of signed data.
+
+            The given field should uniquely identify the user. This means that
+            using any user field which could change over time
+            (``email``, ``username``) is NOT recommended.
+            """),
+    ),
     Field(
         'USER_VERIFICATION_FLAG_FIELD',
         default='is_active',

rest_registration/utils/users.py

@@ -56,10 +56,18 @@ def authenticate_by_login_and_password_or_none(login, password):
     return user
 
 
-def get_user_by_id(user_id, default=_RAISE_EXCEPTION, require_verified=True):
+def get_user_verification_id(user):
+    verification_id_field = get_user_setting('VERIFICATION_ID_FIELD')
+    return getattr(user, verification_id_field)
+
+
+def get_user_by_verification_id(
+        user_verification_id, default=_RAISE_EXCEPTION, require_verified=True):
+    verification_id_field = get_user_setting('VERIFICATION_ID_FIELD')
     return get_user_by_lookup_dict({
-        'pk': user_id,
-    }, require_verified=require_verified)
+        verification_id_field: user_verification_id},
+        default=default,
+        require_verified=require_verified)
 
 
 def get_user_by_lookup_dict(

tests/api/test_register.py

@@ -143,6 +143,45 @@ def test_register_ok(self):
         signer = RegisterSigner(verification_data)
         signer.verify()
 
+    @override_settings(
+        REST_REGISTRATION=shallow_merge_dicts(
+            REST_REGISTRATION_WITH_VERIFICATION, {
+                'USER_VERIFICATION_ID_FIELD': 'username',
+            },
+        ),
+    )
+    def test_register_with_username_as_verification_id_ok(self):
+        # Using username is not recommended if it can change for a given user.
+        data = self._get_register_user_data(password='testpassword')
+        request = self.create_post_request(data)
+        with self.assert_one_mail_sent() as sent_emails, self.timer() as timer:
+            response = self.view_func(request)
+            self.assert_valid_response(response, status.HTTP_201_CREATED)
+        user_id = response.data['id']
+        # Check database state.
+        user = self.user_class.objects.get(id=user_id)
+        self.assertEqual(user.username, data['username'])
+        self.assertTrue(user.check_password(data['password']))
+        self.assertFalse(user.is_active)
+        # Check verification e-mail.
+        sent_email = sent_emails[0]
+        self.assertEqual(sent_email.from_email, VERIFICATION_FROM_EMAIL)
+        self.assertListEqual(sent_email.to, [data['email']])
+        url = self.assert_one_url_line_in_text(sent_email.body)
+
+        verification_data = self.assert_valid_verification_url(
+            url,
+            expected_path=REGISTER_VERIFICATION_URL,
+            expected_fields={'signature', 'user_id', 'timestamp'},
+        )
+        user_verification_id = verification_data['user_id']
+        self.assertEqual(user_verification_id, user.username)
+        url_sig_timestamp = int(verification_data['timestamp'])
+        self.assertGreaterEqual(url_sig_timestamp, timer.start_time)
+        self.assertLessEqual(url_sig_timestamp, timer.end_time)
+        signer = RegisterSigner(verification_data)
+        signer.verify()
+
     @override_settings(
         REST_REGISTRATION=shallow_merge_dicts(
             REST_REGISTRATION_WITH_VERIFICATION, {
@@ -351,8 +390,10 @@ def prepare_user(self):
         self.assertFalse(user.is_active)
         return user
 
-    def prepare_request(self, user, session=False):
-        signer = RegisterSigner({'user_id': user.pk})
+    def prepare_request(self, user, session=False, data_to_sign=None):
+        if data_to_sign is None:
+            data_to_sign = {'user_id': user.pk}
+        signer = RegisterSigner(data_to_sign)
         data = signer.get_signed_data()
         request = self.create_post_request(data)
         if session:
@@ -372,6 +413,22 @@ def test_verify_ok(self):
         user.refresh_from_db()
         self.assertTrue(user.is_active)
 
+    @override_settings(
+        REST_REGISTRATION=shallow_merge_dicts(
+            REST_REGISTRATION_WITH_VERIFICATION, {
+                'USER_VERIFICATION_ID_FIELD': 'username',
+            },
+        ),
+    )
+    def test_verify_with_username_as_verification_id_ok(self):
+        user = self.prepare_user()
+        request = self.prepare_request(
+            user, data_to_sign={'user_id': user.username})
+        response = self.view_func(request)
+        self.assert_valid_response(response, status.HTTP_200_OK)
+        user.refresh_from_db()
+        self.assertTrue(user.is_active)
+
     @override_settings(REST_REGISTRATION=REST_REGISTRATION_WITH_VERIFICATION)
     def test_verify_ok_idempotent(self):
         user = self.prepare_user()