Mastering Geospatial Analysis with Python

forms.py

A web form is used in Django to capture user input and submit it to a view. To make it possible to select an NBA arena name from a drop-down list and have the web map zoom to that location, a new script, forms.py, must be created. Open an IDE and copy the following code into a new file:

from django import formsfrom .models import Arenasclass ArenaForm(forms.Form):    name = ""    description = "Use the dropdown to select an arena."    selections =     forms.ChoiceField(choices=Arenas.objects.values_list('id','name1'),                                  widget=forms.Select(),required=True)

This section creates a form class by subclassing from forms.Form. It has a name field, a description field, and a ChoiceField. The ChoiceField will create a drop-down list, populated by the ...