Bug: ignore_extra=False and allow_population_by_alias=True do not work together

[dmfigol]

• OS: macOS
• Python version import sys; print(sys.version): 3.6.6
• Pydantic version import pydantic; print(pydantic.VERSION): 0.13

Code snippet:

from pydantic import BaseModel, Schema
from typing import Optional

class Model(BaseModel):
    last_updated_by: Optional[str] = Schema(None, alias="lastUpdatedBy")

    class Config:
        ignore_extra = False
        allow_population_by_alias = True

m1 = Model(lastUpdatedBy="dmitry") # ok
m2 = Model(last_updated_by="dmitry") # fails

# >
"""
ValidationError: 1 validation error
last_updated_by
  extra fields not permitted (type=value_error.extra)
"""

Additional info: read docs, including the warning, but it does not seem like this is an expected behavior.

[samuelcolvin]

This is exactly what you would expect unless I'm missing something.

[samuelcolvin]

Oh, I missed allow_population_by_alias.

I guess this is wrong but I think that setting is dumb anyway, maybe we shouldn't have included it.