Python flask POST request

Question

I develop an app in Python and use flask. Here is a snippet of code that tries to generate a message by user input and then attach it to my database:

@app.route('/MakeMessage',methods = ['POST', 'GET'])
def MakeMessage():
   if request.method == 'POST':
       user_id = request.form['user_id']
       content = request.form['content']
       paticipants = [request.form['participant1'],request.form['participant2'],request.form['participant3']]
       m = Message(user_id=user_id,content=content,participants=paticipants)
       return redirect('/AddMessage',m = m)

@app.route('/AddMessage',methods = ['POST', 'GET'])
def AddMessage(m):
   if request.method == 'POST':
      db.session.add(m)
      db.session.commit()
      return 'Your message has been successfully saved'

I know something is wrong with the code, but I don't know what. Any idea?

Does this answer your question? [redirect while passing arguments](https://stackoverflow.com/questions/17057191/redirect-while-passing-arguments) — sahasrara62, May 03 '20 at 13:29

score 0 · Answer 1 · answered May 03 '20 at 15:37

0

AddMessage

takes a parameter m So in the app.route it should be changed to this

@app.route('/AddMessage/<m>')

answered May 03 '20 at 15:37

DevHyperCoder

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Could also be expecting it in the body of the post request, in which case the issue may be that `m` should not be a parameter at all and instead should be assigned as `request.data` after verifying the request was a POST. – zganger May 05 '20 at 03:16
That could be the case – DevHyperCoder May 05 '20 at 03:18

aj3409 · Answer 2 · 2020-05-03T20:36:18.170

You would want to use url_for() in the redirect function to redirect to a route in your application. In addition, you need to put <m> in your route for AddMessage.

from flask import redirect, url_for, request

@app.route('/MakeMessage',methods = ['POST', 'GET'])
def MakeMessage():
   if request.method == 'POST':
      ...
      return redirect(url_for('/AddMessage',m=m))

@app.route('/AddMessage/<m>',methods = ['POST', 'GET'])
def AddMessage(m):
   ...

Python flask POST request

2 Answers2