121 lines
4.3 KiB
Python
121 lines
4.3 KiB
Python
"""Type annotations to use with `__get_pydantic_core_schema__` and `__get_pydantic_json_schema__`."""
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from __future__ import annotations as _annotations
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from typing import TYPE_CHECKING, Any, Union
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from pydantic_core import core_schema
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if TYPE_CHECKING:
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from .json_schema import JsonSchemaMode, JsonSchemaValue
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CoreSchemaOrField = Union[
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core_schema.CoreSchema,
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core_schema.ModelField,
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core_schema.DataclassField,
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core_schema.TypedDictField,
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core_schema.ComputedField,
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]
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__all__ = 'GetJsonSchemaHandler', 'GetCoreSchemaHandler'
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class GetJsonSchemaHandler:
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"""Handler to call into the next JSON schema generation function.
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Attributes:
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mode: Json schema mode, can be `validation` or `serialization`.
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"""
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mode: JsonSchemaMode
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def __call__(self, core_schema: CoreSchemaOrField, /) -> JsonSchemaValue:
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"""Call the inner handler and get the JsonSchemaValue it returns.
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This will call the next JSON schema modifying function up until it calls
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into `pydantic.json_schema.GenerateJsonSchema`, which will raise a
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`pydantic.errors.PydanticInvalidForJsonSchema` error if it cannot generate
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a JSON schema.
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Args:
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core_schema: A `pydantic_core.core_schema.CoreSchema`.
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Returns:
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JsonSchemaValue: The JSON schema generated by the inner JSON schema modify
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functions.
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"""
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raise NotImplementedError
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def resolve_ref_schema(self, maybe_ref_json_schema: JsonSchemaValue, /) -> JsonSchemaValue:
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"""Get the real schema for a `{"$ref": ...}` schema.
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If the schema given is not a `$ref` schema, it will be returned as is.
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This means you don't have to check before calling this function.
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Args:
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maybe_ref_json_schema: A JsonSchemaValue which may be a `$ref` schema.
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Raises:
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LookupError: If the ref is not found.
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Returns:
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JsonSchemaValue: A JsonSchemaValue that has no `$ref`.
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"""
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raise NotImplementedError
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class GetCoreSchemaHandler:
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"""Handler to call into the next CoreSchema schema generation function."""
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def __call__(self, source_type: Any, /) -> core_schema.CoreSchema:
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"""Call the inner handler and get the CoreSchema it returns.
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This will call the next CoreSchema modifying function up until it calls
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into Pydantic's internal schema generation machinery, which will raise a
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`pydantic.errors.PydanticSchemaGenerationError` error if it cannot generate
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a CoreSchema for the given source type.
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Args:
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source_type: The input type.
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Returns:
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CoreSchema: The `pydantic-core` CoreSchema generated.
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"""
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raise NotImplementedError
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def generate_schema(self, source_type: Any, /) -> core_schema.CoreSchema:
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"""Generate a schema unrelated to the current context.
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Use this function if e.g. you are handling schema generation for a sequence
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and want to generate a schema for its items.
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Otherwise, you may end up doing something like applying a `min_length` constraint
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that was intended for the sequence itself to its items!
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Args:
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source_type: The input type.
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Returns:
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CoreSchema: The `pydantic-core` CoreSchema generated.
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"""
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raise NotImplementedError
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def resolve_ref_schema(self, maybe_ref_schema: core_schema.CoreSchema, /) -> core_schema.CoreSchema:
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"""Get the real schema for a `definition-ref` schema.
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If the schema given is not a `definition-ref` schema, it will be returned as is.
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This means you don't have to check before calling this function.
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Args:
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maybe_ref_schema: A `CoreSchema`, `ref`-based or not.
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Raises:
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LookupError: If the `ref` is not found.
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Returns:
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A concrete `CoreSchema`.
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"""
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raise NotImplementedError
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@property
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def field_name(self) -> str | None:
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"""Get the name of the closest field to this validator."""
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raise NotImplementedError
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def _get_types_namespace(self) -> dict[str, Any] | None:
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"""Internal method used during type resolution for serializer annotations."""
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raise NotImplementedError
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