Async return value after commit returns greenlet_spawn has not been called

[daniel-butler]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question 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.

Commit to Help

• I commit to help with one of those options 👆

Example Code

https://github.com/daniel-butler/reproduce-commit-issue

# Look at the repository for the runnable code
...

@app.post("/")
async def root(inpt: Input, db: AsyncSession = Depends(get_db)):
    entry = Entry(content=inpt.content)
    db.add(entry)
    await db.commit()
    await db.refresh(entry)
    print(f"Created entry with id: {entry.id}")  # Can access the id here!

    table_two = TableTwo(content="")
    db.add(table_two)
    entry_id = entry.id   # <--- Using this variable in the response will avoid the error
    await db.commit()
    return {"id": entry.id}

Description

I'm not really sure if SQLModel is the correct package, but figured I would start here. Even though the error is from SQLAlchemy I think it is outside of the SQLAchlemy realm since I can access the variable entry.id in other places in the function. The error can be reproduced using this repository.

The order to reproduce the error below.

sqlalchemy.exc.MissingGreenlet: greenlet_spawn has not been called; can't call await_only() here. Was IO attempted in an unexpected place?

Run the command below, it is set to give a verbose output.

pytest -vv

The error can be avoided by creating and using a variable before the final db.commit() here.

Output from pip freeze.

pip freeze

aiosqlite==0.19.0
annotated-types==0.5.0
anyio==3.7.1
certifi==2023.7.22
fastapi==0.103.2
greenlet==2.0.2
h11==0.14.0
httpcore==0.18.0
httpx==0.25.0
idna==3.4
iniconfig==2.0.0
packaging==23.2
pluggy==1.3.0
pydantic==1.10.13
pydantic_core==2.10.1
pytest==7.4.2
sniffio==1.3.0
SQLAlchemy==1.4.41
sqlalchemy2-stubs==0.0.2a35
sqlmodel==0.0.8
starlette==0.27.0
typing_extensions==4.8.0

Operating System

macOS

Operating System Details

On a Mac M1

SQLModel Version

0.0.8

Python Version

3.11.5

Additional Context

When I refresh the entry it also works.

    ....
    await db.refresh(entry)  # <--- Refreshing from the database again fixes the issue
    return {"id": entry.id}

This is contained in the additional-refresh branch

[HaleTime]

hi, I have a same issue , have you solved?