Passing a variable from a form input to a flask URL - flask

Question

I have a dummy project in Flask, which consists in a web form, where you fill in 3 cities, which are then printed upon submition.
This is my init.py file:
#app.route('/average_temperatures/<city1>/<city2>/<city3>', methods=['POST', 'GET'])
def results_temperature(city1, city2, city3):
return "The cities are: {}, {}, {}".format(city1, city2, city3)
The function works, but I am unable to pass the variables from the form straight into the function, as parameters.
edit:
My goal is to have the city variables as part of the URL in the clean form of /city1/city2/city3.
This is the form:
<div class="input-group">
<form action="{{ url_for('results_temperature', city1=city1, city2=city2, city3=city3) }}" method="POST">
<input type="text" class="form-control" placeholder="City 1" name="city1"></input>
<input type="text" class="form-control" placeholder="City 2" name="city2"></input>
<input type="text" class="form-control" placeholder="City 3" name="city3"></input>
<div class="row" style="margin-bottom: 20px;"></div>
Filling out the form results in a URL
http://example.com/average_temperatures///
So I evidently fail to pass the form fields in the form action part.
Any hits are appreciated, cheers.

Answer 1

You should get the cities from the request.form variable.
#app.route('/average_temperatures', methods=['POST', 'GET'])
def results_temperature():
return "The cities are: {}, {}, {}".format(request.form['city1'], request.form['city2'], request.form['city3'])
In your HTML form:
<form action="{{ url_for('results_temperature') }}" method="POST">
<input type="text" class="form-control" placeholder="City 1" name="city1"></input>
<input type="text" class="form-control" placeholder="City 2" name="city2"></input>
<input type="text" class="form-control" placeholder="City 3" name="city3"></input>
</form>