我有3个从属下拉列表国家/地区的城市路。在用户进行选择的地方系统可以正常工作。
我的问题是：
如何在页面上显示所选选项？
示例：
所选国家= ??
所选城市= ??
所选道路= ??
我正在从视图中以 json 的形式发送数据，该数据显示在下拉列表中
我还需要将所选数据作为字典发送，以便能够在模板上显示正确的结果，如显示的示例所示。
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript" src="http://yourjavascript.com/7174319415/script.js"></script>
<script>$(document).ready(function(){
$('select#selectcountries').change(function () {
var optionSelected = $(this).find("option:selected");
var valueSelected = optionSelected.val();
var country_name = optionSelected.text();
data = {'cnt' : country_name };
$.ajax({
type:"GET",
url:'/getCity',
// data:JSON.stringify(data),
data:data,
success:function(result){
console.log(result);
$("#selectcities option").remove();
for (var i = result.length - 1; i >= 0; i--) {
$("#selectcities").append('<option>'+ result[i].name +'</option>');
};
},
});
});
$('select#selectcities').change(function () {
var optionSelected = $(this).find("option:selected");
var valueSelected = optionSelected.val();
var city_name = optionSelected.text();
data = {'ct' : city_name };
$.ajax({
type:"GET",
url:'/getRoads',
// data:JSON.stringify(data),
data:data,
success:function(result){
console.log(result);
$("#selectroads option").remove();
for (var i = result.length - 1; i >= 0; i--) {
$("#selectroads").append('<option>'+ result[i].name +'</option>');
};
},
});
});
});
</script>
</head>
<body>
<select name="selectcountries" id="selectcountries">
{% for item in countries %}
<option val="{{ item.name }}"> {{ item.name }} </option>
{% endfor %}
</select>
<select name ="selectcities" id="selectcities">
</select>
<select name ="selectroads" id="selectroads">
</select>
<p>the selected country {{ selected_country }}</p>
<p> the selected city {{ selected_city }}</p>
</body>
</html>
from django.shortcuts import render,redirect, render_to_response
from map.models import *
import json as simplejson
from django.http import HttpResponse,JsonResponse
# Create your views here.
def index(request):
countries = Country.objects.all()
print (countries)
return render(request, 'home.html', {'countries': countries})
def getCity(request):
if request.method == 'GET' and request.is_ajax():
country_name = request.GET.get('cnt', None)
print ("ajax country_name ", country_name)
result_set = []
all_cities = []
answer = str(country_name[1:-1])
print('answer = ' ,answer)
selected_country = Country.objects.get(name=answer)
print ("selected country name ", selected_country)
all_cities = selected_country.cities.all()
print("cities are: " , all_cities)
for city in all_cities:
print ("city name", city.name)
result_set.append({'name': city.name})
return HttpResponse(simplejson.dumps(result_set),content_type='application/json')
# return render_to_response(simplejson.dumps(result_set),content_type='application/json', {'selected_country':selected_country})
# return JsonResponse(result_set,status = 200)
else:
return redirect('/')
def getRoads(request):
if request.method == 'GET' and request.is_ajax():
city_name = request.GET.get('ct', None)
print ("ajax city_name ", city_name)
result_set = []
all_roads = []
# answer = str(city_name[1:-1])
answer = str(city_name)
print('answer = ' ,answer)
selected_city = City.objects.get(name=answer)
print ("selected city name ", selected_city)
all_roads = selected_city.roads.all()
print("roads are: " , all_roads)
for road in all_roads:
print ("road name", road.name)
result_set.append({'name': road.name})
return HttpResponse(simplejson.dumps(result_set),content_type='application/json')
# return render_to_response(simplejson.dumps(result_set),content_type='application/json', {'selected_city':selected_city})
# return JsonResponse(result_set,status = 200)
else:
return redirect('/')