Unused status_code field in ValidationError?

[ParthGandhi]

I'm trying to figure out how to return specific status codes from validation errors. Looks like it always returns a 422, ignoring whats specified in the ValidationError.

from flask import Flask
from webargs import fields, ValidationError
from webargs.flaskparser import use_args

app = Flask(__name__)

def dummy_validator(val):
    raise ValidationError(message="Error!", status_code=500)

@app.route('/')
@use_args({'test_field': fields.String(validate=dummy_validator)})
def hello_world(args):
    return 'Hello World!'

if __name__ == '__main__':
    app.run('0.0.0.0', debug=True)

Then: curl -v http://localhost:5000?test_field=hello returns 422 Unprocessable Entity instead of 500 Internal Server Error.

[sloria]

This is a known bug. Since marshmallow catches ValidationErrors, collects and formats them, then reraises a new ValidationError, there is currently no way to use the status_code attribute in a webargs Parser's error_callback.

I welcome any help and ideas on how to address this.

[lafrech]

@ParthGandhi any thoughts on marshmallow-code/marshmallow#996?