Pydantic validation doesn't work when set table=True

[johnsxiong]

First Check

• I added a very descriptive title to this issue.
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the SQLModel documentation, with the integrated search.
• I already searched in Google "How to X in SQLModel" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to SQLModel but to Pydantic.
• I already checked if it is not related to SQLModel but to SQLAlchemy.

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Example Code

from typing import Optional

import sqlalchemy as sa
from sqlmodel import Field, SQLModel


class Hero(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    name: str
    secret_name: str
    age: int = Field(gt=100, sa_column=sa.Column(sa.BigInteger()))


print(Hero()) # >>>  id=None

Description

It didn‘t raise a ValidationError Exception When create a hero object without any params.

Operating System

macOS

Operating System Details

No response

SQLModel Version

0.0.6

Python Version

3.9.5

Additional Context

No response

[lovetoburnswhen]

Duplicate of #134