做一个省份选择器
使用django做后端, mysql数据库, jQuery
列出结构主要的文件, 其它配置比较简单
- models.py
因为所有数据的结构基本一致, 把所有省份, 市和区全部存储一张表, 实现表的自连接
from django.db import models
class Pro(models.Model):
name = models.CharField(max_length=200)
parent = models.ForeignKey('self', null=True, blank=True)
mysql> desc selCity_pro;
+-----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(200) | NO | | NULL | |
| parent_id | int(11) | YES | MUL | NULL | |
+-----------+--------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)
mysql>
插入数据类似这种
INSERT INTO `selCity_pro` VALUES ('110000', '北京市', null);
INSERT INTO `selCity_pro` VALUES ('110100', '东城区', '110000');
INSERT INTO `selCity_pro` VALUES ('110200', '西城区', '110000');
INSERT INTO `selCity_pro` VALUES ('110500', '朝阳区', '110000');
INSERT INTO `selCity_pro` VALUES ('110600', '丰台区', '110000');
INSERT INTO `selCity_pro` VALUES ('110700', '石景山区', '110000');
INSERT INTO `selCity_pro` VALUES ('110800', '海淀区', '110000');
......
- 模板
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>首页</title>
<script src="/static/js/jquery-2.1.4/jquery.min.js"></script>
<script>
$(function(){
$.get('/pro', function(data){
con = $('#province');
$.each(data, function(index, item){
con.append("<option value='"+item.id+"'>"+item.name+"</option>")
});
});
$('#province').change(function(){
val1 = $(this).val();
$.get('/city/'+val1, function(data1){
con1 = $('#city');
con1.empty();
con1.append("<option>选择市</option>");
$.each(data1, function(index, item1){
con1.append("<option value='"+item1.id+"'>"+item1.name+"</option>")
})
})
});
$('#city').change(function(){
val2 = $(this).val();
$.get('/area/'+val2, function(data2){
con2 = $('#area');
con2.empty();
con2 = con2.append("<option>选择区</option>");
$.each(data2, function(index, item2){
con2.append("<option value='"+item2.id+"'>"+item2.name+"</option>")
})
})
});
})
</script>
</head>
<body>
<select id="province" name="province">
<option>选择省</option>
</select>
<select id="city" name="city">
<option>选择市</option>
</select>
<select id="area" name="area">
<option>选择区</option>
</select>
</body>
</html>
- 视图函数views.py
from django.shortcuts import render
from django.http import HttpResponse
import json
from models import Pro
from django.http import JsonResponse
def index(request):
return render(request, 'selCity/index.html')
def pro(request):
pro_objs = Pro.objects.filter(parent__isnull=True)
info_list = [{'id':pro.id, 'name':pro.name} for pro in pro_objs]
return HttpResponse(json.dumps(info_list), content_type="application/json")
def city(request, p_id):
city_objs = Pro.objects.filter(parent=p_id)
city_list = [{'id':city.id, 'name':city.name} for city in city_objs]
return HttpResponse(json.dumps(city_list), 'application/json')
def area(request, a_id):
area_objs = Pro.objects.filter(parent=a_id)
area_list = [{'id':area.id, 'name':area.name} for area in area_objs]
return HttpResponse(json.dumps(area_list), 'application/json')