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AttributeError: 'NoneType' object has no attribute 'min_items' #965

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aknaut opened this issue Nov 5, 2019 · 1 comment · Fixed by #969
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AttributeError: 'NoneType' object has no attribute 'min_items' #965

aknaut opened this issue Nov 5, 2019 · 1 comment · Fixed by #969
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@aknaut aknaut commented Nov 5, 2019

Bug

Please complete:

  • OS: Windows 10
  • Python version import sys; print(sys.version): 3.6.9 |Anaconda, Inc.| (default, Jul 30 2019, 14:00:49) [MSC v.1915 64 bit (AMD64)]
  • Pydantic version import pydantic; print(pydantic.VERSION): 1.0

I get an AttributeError while trying to generate a schema for a dictionary with values of type list.

Example:

from typing import Dict, List
from pydantic import BaseModel

class SomeSchema(BaseModel):
    entries: Dict[str, List[int]]

SomeSchema.schema()

Which results in AttributeError: 'NoneType' object has no attribute 'min_items'

Is this a bug or do I need to define the schema in a different way?

@aknaut aknaut added the bug label Nov 5, 2019
@samuelcolvin samuelcolvin mentioned this issue Nov 6, 2019
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@samuelcolvin samuelcolvin commented Nov 6, 2019

Thanks for reporting, fixed on #969. Let me know if that fixes your problem, I'll release an update in a day or two.

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