propagating a value from one route to another in flask

Question

So, I am very new to flask and front end programming..

I have a form: like this

<form action="{{ url_for('search') }}" method="post">
    Showing values for: <input type="text" name="name" value={{ name }} disabled><br><br>
    <select name="movie" width="300px">
        {% for movie in movie_list %}
        <option value="{{ movie }}" SELECTED>{{ movie }}</option>
        {% endfor %}
    </select>
    <input type="submit" value="Recommend!!">
</form>

And this is how I am capturing in flask

@app.route('/web/search', methods=['post','get'])
def search():
    print request.method, request.form

So, you can see, that in html form.. I have two fields..

name (text box) which already have a default value set

and option_list

And, my intention is, when the user presses "submit", both these fields are received in backend

But the print statement shows..

POST ImmutableMultiDict([('movie', u'foobar')])

But I dont see the name field?

How do I fix this?

I don't think browsers include disabled fields in the request. — dirn, Sep 23 '16 at 05:00
@dirn: So, i want to pass this name when the user submits a form.. whats a good way to capture this ? — frazman, Sep 23 '16 at 05:02
If it needs to be visible, you can use `readonly`. Otherwise just make it hidden. — dirn, Sep 23 '16 at 12:10

score 4 · Accepted Answer · edited May 23 '17 at 12:19

4

Probably because you're missing quotes around the value for the first input.

Also disabled inputs won't be passed, values of disabled inputs will not be submited?

edited May 23 '17 at 12:19

Community

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answered Sep 23 '16 at 04:49

postelrich

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I am actually not sure I understand? – frazman Sep 23 '16 at 04:52
the `value` attribute on the second line is missing quotes. – postelrich Sep 23 '16 at 04:55
but how do i put quotes around it value = " {{ name }} " ? – frazman Sep 23 '16 at 04:55
I did `

` Didnt worked :( – frazman Sep 23 '16 at 04:57
Ah.. so how do i pass the value when user submits the form? – frazman Sep 23 '16 at 05:01

score 2 · Answer 2 · answered Sep 23 '16 at 08:23

You are allowing both GET and POST requests, but you don't differentiate between them in your code. If you want to grab those values when the user submits them, then you need to do something when that form POSTs. Perhaps something like:

@app.route('/web/search/', methods=['POST','GET'])
def search():
    if request.method == 'POST':
        print request.method, request.form
        # do some stuff
        return redirect(url_for('search_results', results=results))
    else:
        return render_template('my_template.html')

Then, in the if statement, you can do things with the variables. In my imaginary case here, I'm sending the user to another web page where you can show the results of the search. I just made up a template name for render_template(), so you can substitute in whatever your template is actually called.

propagating a value from one route to another in flask

2 Answers2