flask Cannot get the form submitted values

Question

I'm newbie to flask,I have such a form:

<form class="form" action={{ url_for('/login') }} method="POST">
        <input type="text" name="usename" placeholder="Username">
        <input type="password" name="password" placeholder="Password">
        <button type="submit" id="login-button">Login</button>
</form>

I use request.form()and request.form.get() to get submitted values,but the result is always the same**"GET / HTTP/1.1" 200 -**

@app.route('/login',methods=['POST','GET'])
def login():
    name=request.form['usename']
    password=request.form['password']
    form_data=request.form.get('usename')
    print name,password,form_data
    return render_template('login.html')

And I try visiting /login ,it shows Bad Request.But when it is modified to such,it's ok.It seems my request statement block is incorrect.

@app.route('/login',methods=['POST','GET'])
def login():
    return render_template('login.html')

could you share the source of the rendered html page that your browser receives? I have a feeling that `url_for` is not returning what it should. — Anuvrat Parashar, May 18 '16 at 10:20
I have solved it after I delete `script` statement block.It's my css file loading problem. — M.Mark, May 18 '16 at 11:17
a problem in css file does not result in a BadRequest for the whole web page. generally. — Anuvrat Parashar, May 18 '16 at 13:00

score 0 · Answer 1 · answered May 18 '16 at 10:04

0

It's because of form action change the

action="{{url_for('index')}}"

Your form does not post actually and you are try to get values. And don't forget to add a view function named index or you can use instead login instead index

answered May 18 '16 at 10:04

metmirr

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score 0 · Answer 2 · answered May 18 '16 at 10:12

0

i guess you are trying to get those values from login.html file. If it is so you have to use something like this

    @app.route('/login',methods = ['GET','POST'])
    def login():
         if request.method =='POST':
              name=request.form['usename']
              password=request.form['password']
              form_data=request.form.get('usename')
              print name,password,form_data
         return render_template('login.html')

answered May 18 '16 at 10:12

manoj prashant k

339
1
13

I try it,but the result is still **GET / HTTP/1.1" 200 -**. – M.Mark May 18 '16 at 10:16
did you change the `{{ url_for('login') }}` – manoj prashant k May 18 '16 at 10:19

score 0 · Answer 3 · edited May 23 '17 at 10:28

0

try leaving the action field emtpy.

<form class="form" action="" method="POST">

leaving it empty will post to the same location where the form was downloaded from, which I guess is your use case here.

[1] Is it a good practice to use an empty URL for a HTML form's action attribute? (action="")

edited May 23 '17 at 10:28

Community

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1

answered May 18 '16 at 10:23

Anuvrat Parashar

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flask Cannot get the form submitted values

3 Answers3