How to validate date type in POST payload with flask restplus?

As @andilabs mentions, it really weird to define expected payload twice. You can define expected payload by using only RequestParser as so:

from flask import Flask, jsonifyfrom flask_restplus import Api, Resource, fields, reqparse, inputsapp = Flask(__name__)api = Api(app)ns = api.namespace('ns')parser = reqparse.RequestParser()parser.add_argument('a_str', type=str)parser.add_argument('a_date', type=inputs.datetime_from_iso8601, required=True)@ns.route('/')class AResource(Resource):    @ns.expect(parser)    def get(self):        try:  # Will raise an error if date can't be parsed.            args = parser.parse_args()  # type `dict`            return jsonify(args)        except:  # `a_date` wasn't provided or it failed to parse arguments.            return {}, 400if __name__ == '__main__':    app.run(debug=True)

Test by using curl:

$ curl -XGET -H "Content-type: application/json" -d '{"a_str": "Name", "a_date": "2012-01-01"}' 'http://127.0.0.1:5000/ns/'{  "a_date": "Sun, 01 Jan 2012 00:00:00 GMT",   "a_str": "Name"}

To validate you can add parameter validate:

@ns.expect(payload, validate=True)

Here is the link to documentation:https://flask-restplus.readthedocs.io/en/stable/swagger.html#the-api-expect-decorator

Step 1: pip install isodate

Step 2: pip install strict-rfc3339

Step 3:

from jsonschema import FormatCheckerapi = Api(your_app,format_checker=FormatChecker(formats=("date-time",)))

Step 4:

@api.expect(your_fields, validate=True)

Reference:Open Issue: https://github.com/noirbizarre/flask-restplus/issues/204