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# Copyright 2022 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import TYPE_CHECKING
from synapse._pydantic_compat import HAS_PYDANTIC_V2
if TYPE_CHECKING or HAS_PYDANTIC_V2:
from pydantic.v1 import BaseModel, Extra
else:
from pydantic import BaseModel, Extra
class RequestBodyModel(BaseModel):
"""A custom version of Pydantic's BaseModel which
- ignores unknown fields and
- does not allow fields to be overwritten after construction,
but otherwise uses Pydantic's default behaviour.
Ignoring unknown fields is a useful default. It means that clients can provide
unstable field not known to the server without the request being refused outright.
Subclassing in this way is recommended by
https://pydantic-docs.helpmanual.io/usage/model_config/#change-behaviour-globally
"""
class Config:
# By default, ignore fields that we don't recognise.
extra = Extra.ignore
# By default, don't allow fields to be reassigned after parsing.
allow_mutation = False
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