Flask 视图返回错误“视图函数没有返回响应" [英] Flask view return error "View function did not return a response"

问题描述

我有一个调用函数来获取响应的视图.但是，它给出了错误View function did not return a response.我该如何解决这个问题?

I have a view that calls a function to get the response. However, it gives the error View function did not return a response. How do I fix this?

from flask import Flask
app = Flask(__name__)

def hello_world():
    return 'test'

@app.route('/hello', methods=['GET', 'POST'])
def hello():
    hello_world()

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

当我尝试通过添加静态值而不是调用函数来测试它时，它起作用了.

When I try to test it by adding a static value rather than calling the function, it works.

@app.route('/hello', methods=['GET', 'POST'])
def hello():
    return "test"

推荐答案

以下不返回响应:

@app.route('/hello', methods=['GET', 'POST'])
def hello():
    hello_world()

你的意思是说...

@app.route('/hello', methods=['GET', 'POST'])
def hello():
    return hello_world()

注意在这个固定函数中添加了return.

Note the addition of return in this fixed function.

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