问题
I have been trying to create a 3 column drop-down list as Country, State, City.
The list of state will be shown based on which country is selected. and the same thing happens to city depends on which State is selected.
My database is as follow. If a country is selected, then states will show depending on country. Same thing happens to City
A member will select his country,state, and city from an already existed Country, State, City databases
from django.db import models
class Member(models.Model):
residing_country = models.CharField(max_length=50)
residing_state = models.CharField(max_length=50)
residing_city = models.CharField(max_length=50)
class Country(models.Model):
country= models.CharField(max_length=20)
class State(models.Model):
state=models.CharField(max_length=20)
country = models.ForeignKey(Country)
class City(models.Model):
city=models.CharField(max_length=20)
state=models.ForeignKey(State)
回答1:
Ive implemented the same thing successfully using this: http://elo80ka.wordpress.com/2009/10/14/jquery-plugin-chained-select-lists/
EDIT:
I dont have the code at hand, but adapting from the tutorial, first you create a views that returns the appropriate JSON:
def filter (request, model_class, field_name):
try:
kwargs = {smart_str(field_name): request.GET['q']}
except KeyError:
raise Http404
qs = model_class.objects.filter(**kwargs).values('pk', 'name')
response = HttpResponse(
content=dumps(list(qs)),
mimetype='application/json'
)
return response
EDIT 2: For the given schema, you would only need to change the urls.
In your urls:
urlpatterns = patterns('',
url(r'^locations/filter/state-by-country/$', 'filter', {'model_class': State, 'field_name': 'country'}, name='state_filter')
url(r'^locations/filter/city-by-state/$', 'filter', {'model_class': City, 'field_name': 'state'}, name='city_filter')
...
)
In your template, you would add the following (or you could create js files and add it to the form media, which is a better option):
$(function() {
$('#id_state').chainedSelect({
parent: '#id_country',
url: 'locations/filter/find-by-country',
value: 'id',
label: 'name'
});
});
$(function() {
$('#id_city').chainedSelect({
parent: '#id_state',
url: 'locations/filter/find-by-state',
value: 'id',
label: 'name'
});
});
If you could describe your table schema a little, i could help better.
回答2:
I've had success with http://github.com/digi604/django-smart-selects. This will mean you need to plug all your country/state/city data into the DB which might not be ideal, but it's an idea.
回答3:
You can try also without ajax call:
<html>
<head>
<title>Demo by kishan Radadiya</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
// Countries
var country_arr = new Array("Select Country","AUSTRALIA","INDIA","NEW ZEALAND","USA","UAE","MAURITIUS");
$.each(country_arr, function (i, item) {
$('#country').append($('<option>', {
value: i,
text : item,
}, '</option>' ));
});
// States
var s_a = new Array();
s_a[0]="Select State";
s_a[1]="Select State|QUEENSLAND|VICTORIA";
s_a[2]="Select State|ANDHRAPRADESH|KARNATAKA|TAMILNADU|DELHI|GOA|W-BENGAL|GUJARAT|MADHYAPRADESH|MAHARASHTRA|RAJASTHAN";
s_a[3]="Select State|AUCKLAND";
s_a[4]="Select State|NEWJERSEY|ILLINOIS";
s_a[5]="Select State|DUBAI";
s_a[6]="Select State|MAURITIUS";
// Cities
var c_a = new Array();
c_a['QUEENSLAND']="BRISBANE";
c_a['VICTORIA']="MELBOURNE";
c_a['ANDHRAPRADESH']="HYDERABAD";
c_a['KARNATAKA']="BANGLORE";
c_a['TAMILNADU']="CHENNAI";
c_a['DELHI']="DELHI";
c_a['GOA']="GOA";
c_a['W-BENGAL']="KOLKATA";
c_a['GUJARAT']="AHMEDABAD1|AHMEDABAD2|AHMEDABAD3|BARODA|BHAVNAGAR|MEHSANA|RAJKOT|SURAT|UNA";
c_a['MADHYAPRADESH']="INDORE";
c_a['MAHARASHTRA']="MUMBAI|PUNE";
c_a['RAJASTHAN']="ABU";
c_a['AUCKLAND']="AUCKLAND";
c_a['NEWJERSEY']="EDISON";
c_a['ILLINOIS']="CHICAGO";
c_a['MAURITIUS']="MAURITIUS";
c_a['DUBAI']="DUBAI";
$('#country').change(function(){
var c = $(this).val();
var state_arr = s_a[c].split("|");
$('#state').empty();
$('#city').empty();
if(c==0){
$('#state').append($('<option>', {
value: '0',
text: 'Select State',
}, '</option>'));
}else {
$.each(state_arr, function (i, item_state) {
$('#state').append($('<option>', {
value: item_state,
text: item_state,
}, '</option>'));
});
}
$('#city').append($('<option>', {
value: '0',
text: 'Select City',
}, '</option>'));
});
$('#state').change(function(){
var s = $(this).val();
if(s=='Select State'){
$('#city').empty();
$('#city').append($('<option>', {
value: '0',
text: 'Select City',
}, '</option>'));
}
var city_arr = c_a[s].split("|");
$('#city').empty();
$.each(city_arr, function (j, item_city) {
$('#city').append($('<option>', {
value: item_city,
text: item_city,
}, '</option>'));
});
});
});
</script>
</head>
<body>
<select name="country" id="country"></select> <br>
<select name="state" id="state"></select> <br>
<select name="city" id="city"></select>
</body>
</html>
来源：https://stackoverflow.com/questions/4071630/django-country-state-city-dropdown-list