"Api object has no attribute _extract_schemas"

[ianseyer]

Hi there!

Excited about this project, and I appreciate your work.

Attempting to run this on pre-existing sqlalchemy models, I get the following error:

api_1       | Traceback (most recent call last):
api_1       |   File "./swagger.py", line 54, in <module>
api_1       |     create_api(app)
api_1       |   File "./swagger.py", line 26, in create_api
api_1       |     api.expose_object(Market)
api_1       |   File "/usr/local/lib/python3.6/site-packages/safrs/jsonapi.py", line 112, in expose_object
api_1       |     methods = ['GET','POST', 'PUT'])
api_1       |   File "/usr/local/lib/python3.6/site-packages/safrs/jsonapi.py", line 265, in add_resource
api_1       |     operation, definitions_ = self._extract_schemas(operation)
api_1       | AttributeError: 'Api' object has no attribute '_extract_schemas'
api_1       | unable to load app 0 (mountpoint='') (callable not found or import error)
api_1       | *** no app loaded. going in full dynamic mode ***
api_1       | *** uWSGI is running in multiple interpreter mode ***
api_1       | spawned uWSGI worker 1 (and the only) (pid: 13, cores: 1)

This is running against objects that inherit from SAFRSBase.

The code is the same as the example, butwith my own models, and exposing them via expose_object.

In addition, I have tried it with the exact test code, replaced sqlite with postgres, and get the same error.

[thomaxxl]

Hi,

Glad you like it! I'll get this resolved asap.
For me things work fine with postgres using

examples/demo_relationship.py:23:app.config.update( SQLALCHEMY_DATABASE_URI = 'postgres://tmpuser:tmppwd@localhost/tmpdb' )

the _extract_schemas method is inherited from flask_restful_swagger_2's Api class ( "flask-restful-swagger-2==0.33" ), eg.

In [4]: from flask_restful_swagger_2 import Api;print(Api._extract_schemas)
<function Api._extract_schemas at 0x7f1f345ce2f0>

Can you share the code you have so I can reproduce it please?

[frankthetank]

Hi guys,

I am experiencing this same issue and believe I found the problem. Pip installed flask_restful_swagger-2==0.35 which does not contain a _extract_schemas method within flask_restful_swagger_2.py:Api(restful_Api). If I force pip to install flask_restful_swagger-2==0.33 and inspect that object I see that it does contain the appropriate method.

Regarding the new FRS version, it exists in _BaseExtractorImpl(Extractor) which is in the same module but definitely not in the class. I could not see where any extractor was wired in to the current object. I suppose the questions are 1) whether the FRS guys provided a migration path for this method and 2) whether your deployment script is being properly executed through tools such as pip, including evaluation of dependencies.

Regarding the last, if I run pip install safrs --target project/dependencies on a system that has no other flask modules installed then pip does not pull in any of the other dependencies. If I run pip install flask_restful_swagger_2 then it installs this module with all of its dependencies, potentially at an incompatible version.

[thomaxxl]

Thanks for bringing this up!

The fix turns out to be pretty simple, I can use the Extractor class from FRS :

from flask_restful_swagger_2 import validate_path_item_object, extract_swagger_path, Extractor

then do

operation, definitions_ = Extractor.extract(operation)

I committed the fix to github. I have to do some more testing and
I will make a new pip package monday, and I'll include the dependencies in the setup.py

Thanks again Frank & Ian!

[thomaxxl]

safrs 1.0.3