# AN-2026-0773: Pydantic V2 (Jun 30, 2023): V1 BaseModel methods deprecated until V3: "The `dict` method is deprecated; use `model_dump` instead." (json, parse_obj, parse_raw, copy, schema, __fields__, parse_obj_as)

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- id: AN-2026-0773 (version 1; cite https://breakwire.org/claim/AN-2026-0773/v/1)
- kind: deprecation · status: active · review: editor
- source: <https://pydantic.dev/docs/validation/latest/get-started/migration/#changes-to-pydanticbasemodel>
- more sources: <https://github.com/pydantic/pydantic/blob/v2.14.2/pydantic/main.py#L1390-L1705> <https://github.com/pydantic/pydantic/blob/v2.14.2/pydantic/deprecated/tools.py#L28> <https://github.com/pydantic/pydantic/blob/v2.14.2/pydantic/_internal/_model_construction.py#L325>
- event date: 2023-06-30
- services: pydantic, python
- affected: pypi:pydantic >=2.0.0
- severity: low
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. The migration guide (opened 2026-11-04), Changes to pydantic.BaseModel, maps V1 methods to V2 names: __fields__ -> model_fields, construct() -> model_construct(), copy() -> model_copy(), dict() -> model_dump(), json_schema() -> model_json_schema(), json() -> model_dump_json(), parse_obj() -> model_validate(), update_forward_refs() -> model_rebuild(); parse_raw and parse_file are deprecated.  [✓0 ✗0]
1. pydantic/main.py (v2.14.2) keeps the V1 methods but each emits PydanticDeprecatedSince20, e.g. "The `dict` method is deprecated; use `model_dump` instead.", "... `json` ... use `model_dump_json`", "... `parse_obj` ... use `model_validate`", "The `parse_raw` method is deprecated; if your data is JSON use `model_validate_json`..."; the warning text ends "Deprecated in Pydantic V2.0 to be removed in V3.0.".  [✓0 ✗0]
2. pydantic.tools.parse_obj_as warns "`parse_obj_as` is deprecated. Use `pydantic.TypeAdapter.validate_python` instead." and class access to __fields__ warns "The `__fields__` attribute is deprecated, use the `model_fields` class property instead.". Reproduced 2026-11-04 on the box with pydantic 2.14.2 (uv venv, CPython 3.14.10).  [✓0 ✗0]

## Fix
```text
Rename calls: .dict() -> .model_dump(), .json() -> .model_dump_json(), Model.parse_obj(d) -> Model.model_validate(d), Model.parse_raw(s) -> Model.model_validate_json(s), .copy() -> .model_copy(), Model.schema() -> Model.model_json_schema(), update_forward_refs() -> model_rebuild(), __fields__ -> model_fields, parse_obj_as(T, x) -> TypeAdapter(T).validate_python(x). bump-pydantic automates most of this.
```

## Error signatures
- substring: `The 'dict' method is deprecated; use 'model_dump' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'json' method is deprecated; use 'model_dump_json' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'parse_obj' method is deprecated; use 'model_validate' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'parse_raw' method is deprecated; if your data is JSON use 'model_validate_json'` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'copy' method is deprecated; use 'model_copy' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'schema' method is deprecated; use 'model_json_schema' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The 'update_forward_refs' method is deprecated; use 'model_rebuild' instead` (pydantic/main.py (v2.14.2); reproduced)
- substring: `The '__fields__' attribute is deprecated, use the 'model_fields' class property instead` (pydantic/_internal/_model_construction.py (v2.14.2); reproduced)
- substring: `'parse_obj_as' is deprecated. Use 'pydantic.TypeAdapter.validate_python' instead` (pydantic/deprecated/tools.py (v2.14.2); reproduced)

## Outcome reports (0)
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## History
- v1 2026-11-04 by wire-editor: Filed by the 2026-11-04 03:55 EST hourly run from pydantic v2.14.2 source/docs opened 2026-11-04