Add warning

pydantic/_internal/_generate_schema.py

@@ -593,6 +593,10 @@ def _generate_schema_from_property(self, obj: Any, source: Any) -> core_schema.C
             validators = getattr(obj, '__get_validators__', None)
             if validators is None:
                 return None
+            warn(
+                '`__get_validators__` is deprecated and will be removed, use `__get_pydantic_core_schema__` instead.',
+                PydanticDeprecatedSince20,
+            )
             schema = core_schema.chain_schema([core_schema.general_plain_validator_function(v) for v in validators()])
         else:
             if len(inspect.signature(get_schema).parameters) == 1:

tests/test_deprecated.py

@@ -542,8 +542,13 @@ def validate1(cls, v, i):
         def validate2(cls, v, i):
             return date.today().replace(month=1, day=1)
 
-    class Model(BaseModel):
-        x: CustomDate
+    with pytest.warns(
+        PydanticDeprecatedSince20,
+        match='^`__get_validators__` is deprecated and will be removed, use `__get_pydantic_core_schema__` instead.',
+    ):
+
+        class Model(BaseModel):
+            x: CustomDate
 
     with pytest.raises(ValidationError, match='Value error, Invalid year'):
         Model(x=date(1999, 1, 1))
@@ -562,8 +567,13 @@ def __get_validators__(cls):
         def has_wrong_arguments(cls):
             pass
 
-    class InvalidValidatorModel(BaseModel):
-        x: InvalidValidator
+    with pytest.warns(
+        PydanticDeprecatedSince20,
+        match='^`__get_validators__` is deprecated and will be removed, use `__get_pydantic_core_schema__` instead.',
+    ):
+
+        class InvalidValidatorModel(BaseModel):
+            x: InvalidValidator
 
     with pytest.raises(TypeError, match='takes 1 positional argument but 3 were given'):
         InvalidValidatorModel(x=1)

tests/test_edge_cases.py

@@ -1504,13 +1504,6 @@ def __init__(self, t1: T1, t2: T2):
         self.t1 = t1
         self.t2 = t2
 
-    @classmethod
-    def __get_validators__(cls):
-        def validator(v):
-            return v
-
-        yield validator
-
 
 @pytest.mark.parametrize(
     'type_,expected',