How to add a pydantic class as a dependency for a GET route?

I want to have a GET route that returns the schema of a pydantic class. This way the frontend can call the get route and can build a form that then posts to the post route. A simple version could be:

class GenerationOptions(BaseModel):
    model: str
    truncation: float

@router.post("/generate")
def generate_image(model: GenerationOptions):
    return something

@router.get("/generate")
def generate_image(model: dict = Depends(GenerationOptions.schema))): # doesn't work
    return {"form_fields": model}

However, this doesn’t work. The only way I can achieve what I want is with another function:

class GenerationOptions(BaseModel):
    model: str
    truncation: float

@router.post("/generate")
def generate_image(model: GenerationOptions):
    return something

def getSomething():
    return GenerationOptions.schema()

@router.get("/generate")
def generate_image(model: dict = Depends(getSomething)):
    return {"form_fields": model}

This works but I think that there might be another/better solution. Any ideas? Thanks!

[pbizimis]

Mostly because the dependency injection makes it easier to test the route.

[pbizimis]

My approach now is this:

class GenerationOptions(BaseModel):
    model: str
    truncation: float

    @classmethod
    def get_schema(cls):
        return cls.schema()

@router.post("/generate")
def generate_image(model: GenerationOptions):
    return model

@router.get("/generate")
def generate_image(model: dict = Depends(GenerationOptions.get_schema)):
    return {"form_fields": model}

I am not sure if this is the best way to do this but this works perfectly for my case.