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import json
import os
import platform
from pathlib import Path
from typing import Any, Union
import pytest
from pydantic_core import SchemaSerializer, core_schema
from ..conftest import plain_repr
on_pypy = platform.python_implementation() == 'PyPy'
# pypy doesn't seem to maintain order of `__dict__`
if on_pypy:
IsStrictDict = dict
else:
pass
class BaseModel:
__slots__ = '__dict__', '__pydantic_fields_set__', '__pydantic_extra__', '__pydantic_private__'
def __init__(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, value)
class RootModel:
__slots__ = '__dict__', '__pydantic_fields_set__', '__pydantic_extra__', '__pydantic_private__'
root: str
def __init__(self, data):
self.root = data
class RootSubModel(RootModel):
pass
def test_model_root():
s = SchemaSerializer(core_schema.model_schema(RootModel, core_schema.int_schema(), root_model=True))
print(plain_repr(s))
# TODO: assert 'mode:RootModel' in plain_repr(s)
assert 'has_extra:false' in plain_repr(s)
assert s.to_python(RootModel(1)) == 1
assert s.to_python(RootSubModel(1)) == 1
j = s.to_json(RootModel(1))
if on_pypy:
assert json.loads(j) == 1
else:
assert j == b'1'
assert json.loads(s.to_json(RootSubModel(1))) == 1
def test_function_plain_field_serializer_to_python():
class Model(RootModel):
def ser_root(self, v: Any, _) -> str:
assert self.root == 1_000
return f'{v:_}'
s = SchemaSerializer(
core_schema.model_schema(
Model,
core_schema.int_schema(
serialization=core_schema.plain_serializer_function_ser_schema(
Model.ser_root, is_field_serializer=True, info_arg=True
)
),
root_model=True,
)
)
assert s.to_python(Model(1000)) == '1_000'
def test_function_wrap_field_serializer_to_python():
class Model(RootModel):
def ser_root(self, v: Any, serializer: core_schema.SerializerFunctionWrapHandler, _) -> str:
root = serializer(v)
assert self.root == 1_000
return f'{root:_}'
s = SchemaSerializer(
core_schema.model_schema(
Model,
core_schema.int_schema(
serialization=core_schema.wrap_serializer_function_ser_schema(
Model.ser_root, is_field_serializer=True, info_arg=True, schema=core_schema.any_schema()
)
),
root_model=True,
)
)
assert s.to_python(Model(1000)) == '1_000'
def test_function_plain_field_serializer_to_json():
class Model(RootModel):
def ser_root(self, v: Any, _) -> str:
assert self.root == 1_000
return f'{v:_}'
s = SchemaSerializer(
core_schema.model_schema(
Model,
core_schema.int_schema(
serialization=core_schema.plain_serializer_function_ser_schema(
Model.ser_root, is_field_serializer=True, info_arg=True
)
),
root_model=True,
)
)
assert json.loads(s.to_json(Model(1000))) == '1_000'
def test_function_wrap_field_serializer_to_json():
class Model(RootModel):
def ser_root(self, v: Any, serializer: core_schema.SerializerFunctionWrapHandler, _) -> str:
assert self.root == 1_000
root = serializer(v)
return f'{root:_}'
s = SchemaSerializer(
core_schema.model_schema(
Model,
core_schema.int_schema(
serialization=core_schema.wrap_serializer_function_ser_schema(
Model.ser_root, is_field_serializer=True, info_arg=True, schema=core_schema.any_schema()
)
),
root_model=True,
)
)
assert json.loads(s.to_json(Model(1000))) == '1_000'
@pytest.mark.parametrize('order', ['BR', 'RB'])
def test_root_model_dump_with_base_model(order):
class BModel(BaseModel):
value: str
b_schema = core_schema.model_schema(
BModel, core_schema.model_fields_schema({'value': core_schema.model_field(core_schema.str_schema())})
)
class RModel(RootModel):
root: int
r_schema = core_schema.model_schema(RModel, core_schema.int_schema(), root_model=True)
if order == 'BR':
class Model(RootModel):
root: list[Union[BModel, RModel]]
choices = [b_schema, r_schema]
elif order == 'RB':
class Model(RootModel):
root: list[Union[RModel, BModel]]
choices = [r_schema, b_schema]
s = SchemaSerializer(
core_schema.model_schema(
Model, core_schema.list_schema(core_schema.union_schema(choices=choices)), root_model=True
)
)
m = Model([RModel(1), RModel(2), BModel(value='abc')])
assert s.to_python(m) == [1, 2, {'value': 'abc'}]
assert s.to_json(m) == b'[1,2,{"value":"abc"}]'
def test_not_root_model():
# https://github.com/pydantic/pydantic/issues/8963
class RootModel:
root: int
v = RootModel()
v.root = '123'
s = SchemaSerializer(
core_schema.model_schema(
RootModel,
core_schema.str_schema(),
root_model=True,
),
)
assert s.to_python(v) == '123'
assert s.to_json(v) == b'"123"'
# Path is chosen because it has a .root property
# which could look like a root model in bad implementations
if os.name == 'nt':
path_value = Path('C:\\a\\b')
path_bytes = b'"C:\\\\a\\\\b"' # fixme double escaping?
else:
path_value = Path('/a/b')
path_bytes = b'"/a/b"'
with pytest.warns(UserWarning, match=r'PydanticSerializationUnexpectedValue\(Expected `RootModel`'):
assert s.to_python(path_value) == path_value
with pytest.warns(UserWarning, match=r'PydanticSerializationUnexpectedValue\(Expected `RootModel`'):
assert s.to_json(path_value) == path_bytes
assert s.to_python(path_value, warnings=False) == path_value
assert s.to_json(path_value, warnings=False) == path_bytes
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