Coverage for pydantic/_internal/_schema_generation_shared.py: 88.89%

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

2 

3from __future__ import annotations 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

4 

5from typing import TYPE_CHECKING, Any, Callable, Literal 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

6 

7from pydantic_core import core_schema 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

8 

9from ..annotated_handlers import GetCoreSchemaHandler, GetJsonSchemaHandler 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

10 

11if TYPE_CHECKING: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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): 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

32 self.generate_json_schema = generate_json_schema 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

33 self.handler = handler_override or generate_json_schema.generate_inner 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

34 self.mode = generate_json_schema.mode 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

35 

36 def __call__(self, core_schema: CoreSchemaOrField, /) -> JsonSchemaValue: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

37 return self.handler(core_schema) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

38 

39 def resolve_ref_schema(self, maybe_ref_json_schema: JsonSchemaValue) -> JsonSchemaValue: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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: 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

54 return maybe_ref_json_schema 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

55 ref = maybe_ref_json_schema['$ref'] 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

56 json_schema = self.generate_json_schema.get_schema_from_definitions(ref) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

57 if json_schema is None: 57 ↛ 58line 57 didn't jump to line 58 because the condition on line 57 was never true35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

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 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

63 

64 

65class CallbackGetCoreSchemaHandler(GetCoreSchemaHandler): 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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__( 34 ctx1abcdefghijklmnopqrstuvJwxyzABCDEFG

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 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

79 self._generate_schema = generate_schema 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

80 self._ref_mode = ref_mode 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

81 

82 def __call__(self, source_type: Any, /) -> core_schema.CoreSchema: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

83 schema = self._handler(source_type) 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

84 if self._ref_mode == 'to-def': 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

85 ref = schema.get('ref') 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

86 if ref is not None: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

87 return self._generate_schema.defs.create_definition_reference_schema(schema) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

88 return schema 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

89 else: # ref_mode = 'unpack' 

90 return self.resolve_ref_schema(schema) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

91 

92 def _get_types_namespace(self) -> NamespacesTuple: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

93 return self._generate_schema._types_namespace 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

94 

95 def generate_schema(self, source_type: Any, /) -> core_schema.CoreSchema: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

96 return self._generate_schema.generate_schema(source_type) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

97 

98 @property 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

99 def field_name(self) -> str | None: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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: 36 ctx1abcdefghijkHIlmnopqrstuvJwxyzABCDEFG

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': 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

115 ref = maybe_ref_schema['schema_ref'] 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

116 definition = self._generate_schema.defs.get_schema_from_ref(ref) 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

117 if definition is None: 117 ↛ 118line 117 didn't jump to line 118 because the condition on line 117 was never true35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

118 raise LookupError( 

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 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

123 elif maybe_ref_schema['type'] == 'definitions': 123 ↛ 124line 123 didn't jump to line 124 because the condition on line 123 was never true35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG

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

125 return maybe_ref_schema 35 ctx1abcdefghijkHIlmnopqrstuvwxyzABCDEFG