来自 reqparse flask_Restful 的 parse_args 返回错误

Question

. Answers to this question are eligible for a +50 reputation bounty. Vizag wants to to this question.

I'm using flask_restful and using reqparse to get params as an example:

from flask_restful import Resource, reqparse

path_params = reqparse.RequestParser()
path_params.add_argument("city", type=str)
path_params.add_argument("star_min", type=float)
path_params.add_argument("star_max", type=float)
path_params.add_argument("diary_max", type=float)
path_params.add_argument("diary_min", type=float)
path_params.add_argument("limit", type=float)
path_params.add_argument("offset", type=float)

       data = path_params.parse_args()
// returning error here : "message": "Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)"

What can I do to solve this, please?

Answer 1

What you are seeing is the error when json.load or ( json.loads ) receives an empty JSON document to decode.

import json

json.loads("")
# raises JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Without more of your code and especially request you sent, we cannot tell you more about your problem.

But, if I run the full example from the Flask-RESTful docs and request an empty JSON doc, I get the same error.

curl http://localhost:5000/todos -H "Content-Type: application/json" -d '' -X POST

{
    "message": "Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)"
}