validators: Use cleaner syntax for AfterValidator.

Created a function that returns an `AfterValidator` for `check_int_in`
and `check_string_in` instead of having to use a
`lambda` wraper everytime.

corporate/views/upgrade.py

@@ -4,7 +4,7 @@ from typing import Annotated
 from django.conf import settings
 from django.http import HttpRequest, HttpResponse, HttpResponseRedirect
 from django.shortcuts import render
-from pydantic import AfterValidator, Json
+from pydantic import Json
 
 from corporate.lib.decorator import (
     authenticated_remote_realm_management_endpoint,
@@ -25,7 +25,7 @@ from corporate.models import CustomerPlan
 from zerver.decorator import require_organization_member, zulip_login_required
 from zerver.lib.response import json_success
 from zerver.lib.typed_endpoint import typed_endpoint
-from zerver.lib.typed_endpoint_validators import check_string_in
+from zerver.lib.typed_endpoint_validators import check_string_in_validator
 from zerver.models import UserProfile
 from zilencer.lib.remote_counts import MissingDataError
 
@@ -38,17 +38,11 @@ def upgrade(
     request: HttpRequest,
     user: UserProfile,
     *,
-    billing_modality: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_MODALITY_VALUES))
-    ],
-    schedule: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_SCHEDULE_VALUES))
-    ],
+    billing_modality: Annotated[str, check_string_in_validator(VALID_BILLING_MODALITY_VALUES)],
+    schedule: Annotated[str, check_string_in_validator(VALID_BILLING_SCHEDULE_VALUES)],
     signed_seat_count: str,
     salt: str,
-    license_management: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_LICENSE_MANAGEMENT_VALUES))
-    ]
+    license_management: Annotated[str, check_string_in_validator(VALID_LICENSE_MANAGEMENT_VALUES)]
     | None = None,
     licenses: Json[int] | None = None,
     tier: Json[int] = CustomerPlan.TIER_CLOUD_STANDARD,
@@ -94,17 +88,11 @@ def remote_realm_upgrade(
     request: HttpRequest,
     billing_session: RemoteRealmBillingSession,
     *,
-    billing_modality: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_MODALITY_VALUES))
-    ],
-    schedule: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_SCHEDULE_VALUES))
-    ],
+    billing_modality: Annotated[str, check_string_in_validator(VALID_BILLING_MODALITY_VALUES)],
+    schedule: Annotated[str, check_string_in_validator(VALID_BILLING_SCHEDULE_VALUES)],
     signed_seat_count: str,
     salt: str,
-    license_management: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_LICENSE_MANAGEMENT_VALUES))
-    ]
+    license_management: Annotated[str, check_string_in_validator(VALID_LICENSE_MANAGEMENT_VALUES)]
     | None = None,
     licenses: Json[int] | None = None,
     remote_server_plan_start_date: str | None = None,
@@ -149,17 +137,11 @@ def remote_server_upgrade(
     request: HttpRequest,
     billing_session: RemoteServerBillingSession,
     *,
-    billing_modality: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_MODALITY_VALUES))
-    ],
-    schedule: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_BILLING_SCHEDULE_VALUES))
-    ],
+    billing_modality: Annotated[str, check_string_in_validator(VALID_BILLING_MODALITY_VALUES)],
+    schedule: Annotated[str, check_string_in_validator(VALID_BILLING_SCHEDULE_VALUES)],
     signed_seat_count: str,
     salt: str,
-    license_management: Annotated[
-        str, AfterValidator(lambda val: check_string_in(val, VALID_LICENSE_MANAGEMENT_VALUES))
-    ]
+    license_management: Annotated[str, check_string_in_validator(VALID_LICENSE_MANAGEMENT_VALUES)]
     | None = None,
     licenses: Json[int] | None = None,
     remote_server_plan_start_date: str | None = None,

zerver/lib/typed_endpoint_validators.py

@@ -1,6 +1,9 @@
+from collections.abc import Collection
+
 from django.core.exceptions import ValidationError
 from django.core.validators import URLValidator
 from django.utils.translation import gettext as _
+from pydantic import AfterValidator
 from pydantic_core import PydanticCustomError
 
 # The Pydantic.StringConstraints does not have validation for the string to be
@@ -19,18 +22,26 @@ def check_string_fixed_length(string: str, length: int) -> str | None:
     return string
 
 
-def check_string_in(val: str, possible_values: list[str]) -> str:
+def check_string_in(val: str, possible_values: Collection[str]) -> str:
     if val not in possible_values:
         raise ValueError(_("Not in the list of possible values"))
     return val
 
 
-def check_int_in(val: int, possible_values: list[int]) -> int:
+def check_int_in(val: int, possible_values: Collection[int]) -> int:
     if val not in possible_values:
         raise ValueError(_("Not in the list of possible values"))
     return val
 
 
+def check_int_in_validator(possible_values: Collection[int]) -> AfterValidator:
+    return AfterValidator(lambda val: check_int_in(val, possible_values))
+
+
+def check_string_in_validator(possible_values: Collection[str]) -> AfterValidator:
+    return AfterValidator(lambda val: check_string_in(val, possible_values))
+
+
 def check_url(val: str) -> str:
     validate = URLValidator()
     try:

zerver/tests/test_typed_endpoint_validators.py

@@ -1,5 +1,5 @@
 from zerver.lib.test_classes import ZulipTestCase
-from zerver.lib.typed_endpoint_validators import check_int_in, check_url
+from zerver.lib.typed_endpoint_validators import check_int_in, check_string_in, check_url
 
 
 class ValidatorTestCase(ZulipTestCase):
@@ -8,6 +8,11 @@ class ValidatorTestCase(ZulipTestCase):
         with self.assertRaisesRegex(ValueError, "Not in the list of possible values"):
             check_int_in(3, [1, 2])
 
+    def test_check_string_in(self) -> None:
+        check_string_in("foo", ["foo", "bar"])
+        with self.assertRaisesRegex(ValueError, "Not in the list of possible values"):
+            check_string_in("foo", ["bar"])
+
     def test_check_url(self) -> None:
         check_url("https://example.com")
         with self.assertRaisesRegex(ValueError, "Not a URL"):

zerver/tests/test_user_topics.py

@@ -688,6 +688,26 @@ class UnmutedTopicsTests(ZulipTestCase):
         self.assert_json_error(result, "Invalid channel ID")
 
 
+class UserTopicsTests(ZulipTestCase):
+    def test_invalid_visibility_policy(self) -> None:
+        user = self.example_user("hamlet")
+        self.login_user(user)
+
+        stream = get_stream("Verona", user.realm)
+
+        url = "/api/v1/user_topics"
+        data = {
+            "stream_id": stream.id,
+            "topic": "Verona3",
+            "visibility_policy": 999,
+        }
+
+        result = self.api_post(user, url, data)
+        self.assert_json_error(
+            result, "Invalid visibility_policy: Value error, Not in the list of possible values"
+        )
+
+
 class AutomaticallyFollowTopicsTests(ZulipTestCase):
     def test_automatically_follow_topic_on_initiation(self) -> None:
         hamlet = self.example_user("hamlet")

zerver/tests/test_users.py

@@ -461,6 +461,14 @@ class PermissionTest(ZulipTestCase):
         result = self.client_patch("/json/users/{}".format(self.example_user("hamlet").id), req)
         self.assert_json_error(result, "Invalid format!")
 
+    def test_invalid_role(self) -> None:
+        self.login("iago")
+        req = dict(role=1000)
+        result = self.client_patch("/json/users/{}".format(self.example_user("hamlet").id), req)
+        self.assert_json_error(
+            result, "Invalid role: Value error, Not in the list of possible values"
+        )
+
     def test_admin_cannot_set_full_name_with_invalid_characters(self) -> None:
         new_name = "Opheli*"
         self.login("iago")

zerver/views/user_topics.py

@@ -4,7 +4,7 @@ from typing import Annotated, Literal
 from django.http import HttpRequest, HttpResponse
 from django.utils.timezone import now as timezone_now
 from django.utils.translation import gettext as _
-from pydantic import AfterValidator, Json, StringConstraints
+from pydantic import Json, StringConstraints
 
 from zerver.actions.user_topics import do_set_user_topic_visibility_policy
 from zerver.lib.response import json_success
@@ -16,7 +16,7 @@ from zerver.lib.streams import (
     check_for_exactly_one_stream_arg,
 )
 from zerver.lib.typed_endpoint import typed_endpoint
-from zerver.lib.typed_endpoint_validators import check_int_in
+from zerver.lib.typed_endpoint_validators import check_int_in_validator
 from zerver.models import UserProfile, UserTopic
 from zerver.models.constants import MAX_TOPIC_NAME_LENGTH
 
@@ -100,10 +100,7 @@ def update_user_topic(
     stream_id: Json[int],
     topic: Annotated[str, StringConstraints(max_length=MAX_TOPIC_NAME_LENGTH)],
     visibility_policy: Json[
-        Annotated[
-            int,
-            AfterValidator(lambda x: check_int_in(x, UserTopic.VisibilityPolicy.values)),
-        ]
+        Annotated[int, check_int_in_validator(UserTopic.VisibilityPolicy.values)]
     ],
 ) -> HttpResponse:
     if visibility_policy == UserTopic.VisibilityPolicy.INHERIT:

zerver/views/users.py

@@ -57,7 +57,7 @@ from zerver.lib.typed_endpoint import (
     typed_endpoint,
     typed_endpoint_without_parameters,
 )
-from zerver.lib.typed_endpoint_validators import check_int_in, check_url
+from zerver.lib.typed_endpoint_validators import check_int_in_validator, check_url
 from zerver.lib.types import ProfileDataElementUpdateDict
 from zerver.lib.upload import upload_avatar_image
 from zerver.lib.url_encoding import append_url_query_string
@@ -98,11 +98,8 @@ from zproject.backends import check_password_strength
 
 RoleParamType: TypeAlias = Annotated[
     int,
-    AfterValidator(
-        lambda x: check_int_in(
-            x,
-            UserProfile.ROLE_TYPES,
-        )
+    check_int_in_validator(
+        UserProfile.ROLE_TYPES,
     ),
 ]