This is a question upon the use of wtforms SelectField.
Once the form submitted, I wish to extract selected text.
I have the following form:
from wtforms import Form, SelectField
class TestForm(Form):
hour = SelectField(u'Hour', choices=[('1', '8am'), ('2', '10am') ])
Here's the view:
@app.route('/', methods=['GET', 'POST'])
def test_create():
form =TestForm(request.form)
if request.method == 'POST' and form.validate():
test = Test()
form.populate_obj(test)
test.hour=form.hour.name
db.session.add(test)
db.session.commit()
return redirect(url_for('test_create'))
return render_template('test/edit.html', form=form)
With test.hour=form.hour.name I obtain the attribute name (no surprise...), whilst I need the text (let's say 8am if the first option is chosen).
How should this be possible ? Thanks for any hint.
5 Answers
Define choices global in forms:
HOUR_CHOICES = [('1', '8am'), ('2', '10am')]
class TestForm(Form):
hour = SelectField(u'Hour', choices=HOUR_CHOICES)
import it from forms, convert it to dict:
from .forms import HOUR_CHOICES
hour_display = dict(HOUR_CHOICES).get(form.hour.data)
It was answered as a comment, so I'm writing here.
Use form.hour.data to get the value instead of the name.
If you don't need the choice indexes, is much more simpler:
class TestForm(Form):
hour = SelectField(u'Hour', choices=[('8am', '8am'), ('10am', '10am') ])
When you set your choices, the list looks like [(index, value),...] so you don't need to import it, and probably shouldn't if setting dynamically
value = dict(form.hour.choices).get(form.hour.data)
Substitute self for form if inside form class
In general, I often zip the choices so index and value are the same. However, sometimes I want to present a displayed selection that's shorter than the value of interest. In that case, I think of it like [(value, display),...] and then the data variable is the value of interest. For example, [(abspath, basename), ...]
Another option is to get the index from form.hour.data and call it like this:
index = int(form.hour.data)
form.hour.choices[index][1]
