flask-pydantic==0.10.0
flask==2.1.2

Steps to reproduce

1. Define a query model with an aliased list field.

class QueryModel(BaseModel):
    order_by: Optional[
        List[Literal["created", "name"]]
    ] = Field(..., alias="order-by")

    class Config:
        allow_population_by_field_name = True

2. Set this as query: QueryModel in your request handler function signature.
3. Send a request with ?order-by=name

Expected result

• The request should be considered valid.
• query.order_by should be a list ['name'].

Actual result

{
  "validation_error": {
    "query_params": [
      {
        "loc": [
          "order-by"
        ], 
        "msg": "value is not a valid list", 
        "type": "type_error.list"
      }
    ]
  }
}

In short:

• Aliased query params work.
• List query params work (e.g. ?order_by=name&order_by=created gives you list with these values).
• Aliased list query params do not work.