最近在做一个基于django框架的项目，需要实现级联选择菜单，比如省-市-区，记录下来，希望能帮助碰到同样问题的人。

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无代码无真相，直接上代码：

js代码：

<script src="/site_media/js/jquery-1.5.2.min.js" type="text/javascript"></script> 
<script type="text/javascript"> 
	function getCityOptions(province_id){  
		$.ajax({   
			type: "GET",
			url: "/getCityList?provinceID="+province_id,	   
			dataType:'json',   
			success: function(data,textStatus){
				var citySelect = document.getElementById("id_city");
				for ( var i=citySelect.options.length-1; i>-1; i--){   
					citySelect[i] = null;   
				}     
				if(data.length > 0) {
					$("#id_city").show();  
					for(i=0;i<data.length;i++){   
						citySelect.options[i] = new Option();   
						citySelect.options[i].text = data[i].label;   
						citySelect.options[i].value = data[i].text; 
					}
				}else
					$("#id_city").hide();  
				 
			}    
		})   
	}  
</script> 

模板代码：

<label>省市:</label>	
        {{form.province}}
        {{form.city}}

Form.py：

provinces = Province.objects.all()
PROVINCE_CHOICES = []
for province in provinces:
    PROVINCE_CHOICES.append([province.id, province.provinceName])
class myForm(forms.Form): province = forms.ChoiceField(widget = forms.Select(attrs={'class':'select', 'onChange':'getCityOptions(this.value)'}), choices = PROVINCE_CHOICES, label= u'选择省') city = forms.ChoiceField(widget = forms.Select(attrs={'class':'select', 'onChange':'getDistrictOptions(this.value)','style':'display:none'}), label = u'选择市')

model.py:

class Province(models.Model):
   provinceName = models.CharField(max_length = 20)
class City(models.Model):
   cityName = models.CharField(max_length = 20)
   provinceID = models.ForeignKey(Province)

view.py

def city_list(request):
    city_list = []
    province = request.GET['provinceID']
    citys = City.objects.filter(provinceID = province)
    for city in citys:
        c = {}
        c['label'] = city.cityName
        c['text'] = city.id
        city_list.append(c)
    return HttpResponse(simplejson.dumps(city_list), mimetype='application/json')