Use metadata in dataclass field to populate pydantic Field

[m10d]

Checks

• [x ] I added a descriptive title to this issue
• [ x] I have searched (google, github) for similar issues and couldn't find anything
• [x ] I have read and followed the docs and still think this is a bug

Bug

Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":

...             pydantic version: 1.7.3
            pydantic compiled: True
                 install path: $VENV_PATH/lib/python3.8/site-packages/pydantic
               python version: 3.8.5 (default, Jul 28 2020, 12:59:40)  [GCC 9.3.0]
                     platform: Linux-5.8.0-43-generic-x86_64-with-glibc2.29
     optional deps. installed: ['typing-extensions']

from pydantic import BaseModel, Field
from pydantic.dataclasses import dataclass
from dataclasses import field

class DescriptionFromBasemodel(BaseModel):
    descr_present: int = Field(
        42,
        title='my title',
        description='descr text',)


print(DescriptionFromBasemodel.schema_json(indent=4))

@dataclass
class DataclassWithDescription:
   descr_missing: int = field(metadata=dict(
       title="my title",
       description="descr text"))

print(DataclassWithDescription.__pydantic_model__.schema_json(indent=4))

outputs as expected for raw basemodel:

{
    "title": "DescriptionFromBasemodel",
    "type": "object",
    "properties": {
        "descr_present": {
            "title": "my title",
            "description": "descr text",
            "default": 42,
            "type": "integer"
        }
    }
}

but for the model generated from the dataclass, no attrs are preserved:

    "title": "DataclassWithDescription",
    "type": "object",
    "properties": {
        "descr_missing": {
            "title": "Descr Missing",
            "type": "integer"
        }
    },
    "required": [
        "descr_missing"
    ]
}

[PrettyWood]

Hi @m10d
This is not a bug but a feature request related to #470.
There is no current support of what you're asking for pydantic dataclass
But I agree using metadata kwarg of field would make sense