Coverage for pydantic/_internal/_schema_generation_shared.py: 92.06%

1"""Types and utility functions used by various other internal tools.""" 

2 

3from __future__ import annotations 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

4 

5from typing import TYPE_CHECKING, Any, Callable, Literal 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

6 

7from pydantic_core import core_schema 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

8 

9from ..annotated_handlers import GetCoreSchemaHandler, GetJsonSchemaHandler 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

10 

11if TYPE_CHECKING: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

12 from ..json_schema import GenerateJsonSchema, JsonSchemaValue 

13 from ._core_utils import CoreSchemaOrField 

14 from ._generate_schema import GenerateSchema 

15 from ._namespace_utils import NamespacesTuple 

16 

17 GetJsonSchemaFunction = Callable[[CoreSchemaOrField, GetJsonSchemaHandler], JsonSchemaValue] 

18 HandlerOverride = Callable[[CoreSchemaOrField], JsonSchemaValue] 

19 

20 

21class GenerateJsonSchemaHandler(GetJsonSchemaHandler): 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

22 """JsonSchemaHandler implementation that doesn't do ref unwrapping by default. 

23 

24 This is used for any Annotated metadata so that we don't end up with conflicting 

25 modifications to the definition schema. 

26 

27 Used internally by Pydantic, please do not rely on this implementation. 

28 See `GetJsonSchemaHandler` for the handler API. 

29 """ 

30 

31 def __init__(self, generate_json_schema: GenerateJsonSchema, handler_override: HandlerOverride | None) -> None: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

32 self.generate_json_schema = generate_json_schema 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

33 self.handler = handler_override or generate_json_schema.generate_inner 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

34 self.mode = generate_json_schema.mode 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

35 

36 def __call__(self, core_schema: CoreSchemaOrField, /) -> JsonSchemaValue: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

37 return self.handler(core_schema) 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

38 

39 def resolve_ref_schema(self, maybe_ref_json_schema: JsonSchemaValue) -> JsonSchemaValue: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

40 """Resolves `$ref` in the json schema. 

41 

42 This returns the input json schema if there is no `$ref` in json schema. 

43 

44 Args: 

45 maybe_ref_json_schema: The input json schema that may contains `$ref`. 

46 

47 Returns: 

48 Resolved json schema. 

49 

50 Raises: 

51 LookupError: If it can't find the definition for `$ref`. 

52 """ 

53 if '$ref' not in maybe_ref_json_schema: 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

54 return maybe_ref_json_schema 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

55 ref = maybe_ref_json_schema['$ref'] 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

56 json_schema = self.generate_json_schema.get_schema_from_definitions(ref) 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

57 if json_schema is None: 57 ↛ 58line 57 didn't jump to line 58 because the condition on line 57 was never true41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

58 raise LookupError( 

59 f'Could not find a ref for {ref}.' 

60 ' Maybe you tried to call resolve_ref_schema from within a recursive model?' 

61 ) 

62 return json_schema 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

63 

64 

65class CallbackGetCoreSchemaHandler(GetCoreSchemaHandler): 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

66 """Wrapper to use an arbitrary function as a `GetCoreSchemaHandler`. 

67 

68 Used internally by Pydantic, please do not rely on this implementation. 

69 See `GetCoreSchemaHandler` for the handler API. 

70 """ 

71 

72 def __init__( 40 ctx1abcdefghijklKmnopqrstuvwxNPyzABCDEFGHIJO

73 self, 

74 handler: Callable[[Any], core_schema.CoreSchema], 

75 generate_schema: GenerateSchema, 

76 ref_mode: Literal['to-def', 'unpack'] = 'to-def', 

77 ) -> None: 

78 self._handler = handler 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

79 self._generate_schema = generate_schema 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

80 self._ref_mode = ref_mode 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

81 

82 def __call__(self, source_type: Any, /) -> core_schema.CoreSchema: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

83 schema = self._handler(source_type) 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

84 if self._ref_mode == 'to-def': 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

85 ref = schema.get('ref') 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

86 if ref is not None: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

87 return self._generate_schema.defs.create_definition_reference_schema(schema) 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

88 return schema 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

89 else: # ref_mode = 'unpack' 

90 return self.resolve_ref_schema(schema) 38 ctx1abcdefghijklLMmnopqrstuvwxyzABCDEFGHIJ

91 

92 def _get_types_namespace(self) -> NamespacesTuple: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

93 return self._generate_schema._types_namespace 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

94 

95 def generate_schema(self, source_type: Any, /) -> core_schema.CoreSchema: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

96 return self._generate_schema.generate_schema(source_type) 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

97 

98 @property 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

99 def field_name(self) -> str | None: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

100 return self._generate_schema.field_name_stack.get() 

101 

102 def resolve_ref_schema(self, maybe_ref_schema: core_schema.CoreSchema) -> core_schema.CoreSchema: 42 ctx1abcdefghijklKLMmnopqrstuvwxNPyzABCDEFGHIJO

103 """Resolves reference in the core schema. 

104 

105 Args: 

106 maybe_ref_schema: The input core schema that may contains reference. 

107 

108 Returns: 

109 Resolved core schema. 

110 

111 Raises: 

112 LookupError: If it can't find the definition for reference. 

113 """ 

114 if maybe_ref_schema['type'] == 'definition-ref': 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

115 ref = maybe_ref_schema['schema_ref'] 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

116 definition = self._generate_schema.defs.get_schema_from_ref(ref) 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

117 if definition is None: 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

118 raise LookupError( 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

119 f'Could not find a ref for {ref}.' 

120 ' Maybe you tried to call resolve_ref_schema from within a recursive model?' 

121 ) 

122 return definition 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

123 elif maybe_ref_schema['type'] == 'definitions': 123 ↛ 124line 123 didn't jump to line 124 because the condition on line 123 was never true41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO

124 return self.resolve_ref_schema(maybe_ref_schema['schema']) 

125 return maybe_ref_schema 41 ctx1abcdefghijklKLMmnopqrstuvwxNyzABCDEFGHIJO