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init() missing 2 required positional arguments: 'schema_name_resolver' and 'spec'

See original GitHub issue

Hello, I’m getting the error below. Am I missing anything?

../../../env36/lib64/python3.6/site-packages/flask_base/app.py:1: in <module>
    from flasgger import Swagger, LazyString, LazyJSONEncoder
../../../env36/lib64/python3.6/site-packages/flasgger/__init__.py:8: in <module>
    from .base import Swagger, Flasgger, NO_SANITIZER, BR_SANITIZER, MK_SANITIZER, LazyJSONEncoder  # noqa
../../../env36/lib64/python3.6/site-packages/flasgger/base.py:37: in <module>
    from .utils import extract_definitions
../../../env36/lib64/python3.6/site-packages/flasgger/utils.py:22: in <module>
    from .marshmallow_apispec import SwaggerView
../../../env36/lib64/python3.6/site-packages/flasgger/marshmallow_apispec.py:13: in <module>
    openapi_converter = openapi.OpenAPIConverter(openapi_version='2.0')
E   TypeError: __init__() missing 2 required positional arguments: 'schema_name_resolver' and 'spec'

Issue Analytics

State:
Created 5 years ago
Reactions:23
Comments:12 (1 by maintainers)

Top GitHub Comments

5reactions

dhughesni-zzcommented, Feb 17, 2019

I have identified the same error, although I was unable to trace the exact change in either module: apispec or marshmallow.

Investigation

The error reports in flasgger:

../../../env36/lib64/python3.6/site-packages/flasgger/marshmallow_apispec.py:13: in <module>
    openapi_converter = openapi.OpenAPIConverter(openapi_version='2.0')
E   TypeError: __init__() missing 2 required positional arguments: 'schema_name_resolver' and 'spec'

The file was last changed 8 months ago with 54d9e77 on 29 Jun 2018: https://github.com/rochacbruno/flasgger/blob/master/flasgger/marshmallow_apispec.py

The file imports the following: from apispec.ext.marshmallow import openapi

Which leads us to: https://github.com/marshmallow-code/apispec/blob/dev/apispec/ext/marshmallow/openapi.py#L107 After reviewing the commits, it seems the following changes may have resulted in the error in flasgger:

The fix to flasgger

https://github.com/rochacbruno/flasgger/blob/master/flasgger/marshmallow_apispec.py#L13

openapi_converter = openapi.OpenAPIConverter(
    openapi_version="2.0", 
    schema_name_resolver=None, 
    spec=None
)

This change enables the code to run, but I am not aware of any underlying implications or restrictions of specifying None.

Note: apisepc contains a default resolver method, again I am not aware of whether flasgger should default to this. https://github.com/marshmallow-code/apispec/blob/dev/apispec/ext/marshmallow/__init__.py#L40

I hope this investigation helps in the resolution of the issue.

4reactions

kushan-gunasekeracommented, Jul 25, 2019

This issue is fixed now, but still not in pypi. Try to install it using pip install https://github.com/rochacbruno/flasgger/tarball/master.

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