Add from_attributes to ConfigDict

[michael2to3]

Added an option to set the from_attributes in PydanticV2 models through the --extra-template-data. This lets you automatically add ConfigDict with from_attributes to your templates, making it easier to create models that work well with ORM attributes

datamodel-codegen --output-model-type pydantic_v2.BaseModel \
    --extra-template-data ./extra.json \
    --input-file-type jsonschema \
    --input ./schema.json --output ./tmp.py

extra.json:

{
  "#all#": {
    "config": {
      "from_attributes": "True"
    }
  }
}

tmp.py:

# generated by datamodel-codegen:
#   filename:  schema.json
#   timestamp: 2024-05-05T11:18:15+00:00

from __future__ import annotations

from typing import Any

from pydantic import BaseModel, ConfigDict, RootModel


class Model(RootModel[Any]):
    model_config = ConfigDict(
        from_attributes=True,
    )
    root: Any


class Example(BaseModel):
    model_config = ConfigDict(
        from_attributes=True,
    )
    value: Any

[codecov]

Codecov Report

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[codspeed-hq]

CodSpeed Performance Report

Merging #1946 will not alter performance

_{Comparing michael2to3:feat/from_attribute_pydanticv2 (5fb160f) with main (f703dff)}

Summary

✅ 29 untouched benchmarks