解决Django中多条件查询的问题
tags: django中对条件查询
⼀些cms项⽬都会使⽤到多条件查询，我们后端如何处理请求的条件呢?
满⾜⼀个条件
满⾜两个条件
满⾜多个条件
………………….
这样处理起来会⾮常的恼⽕. 其实有多⽅法⽐如(传参数，传字典，传Q对象，传F对象…)陷⼊深深的思考中…怎么⽤做简单的⽅法把这个需求解决了.
个⼈觉得.把我们的查询的所有条件来构建⼀个字典来查询起来⽐较⾼效.具体如何操作见下⾯的代码:
视图函数.
def order_list(request):
hod == 'GET':
return render(request, 'admin/order_list.html')
hod == 'POST':
# 获取案件号
case_order = ('case_order')
# 获取客户姓名
case_name = ('case_name')
# 获取⾝份证号码
idno = ('idno')
# 获取贷款⽇期
loan_date = ('loan_date')
# 获取贷款状态
state = ('state')
# 获取贷款类型
dk_type = ('dk_type')
# 定⼀个字典⽤于保存前端发送过来的查询条件
search_dict = dict()
# 如果有这个值就写⼊到字典中去
if case_order:
search_dict['loan_id'] = case_order
if case_name:
search_dict['name'] = case_name
if idno:
search_dict['user_card'] = idno
if loan_date:
search_dict['pri_date'] = loan_date
if state:
# 通过关联关系查询出来需要的数据
state_info = StatuTable.objects.filter(statu_name=state).first()
search_dict['statu_id'] = state_info.statu_id
if dk_type:
loa = LoantypeTable.objects.filter(loan_name=dk_type).first()
search_dict['loa_loan_id'] = loa.loan_id
# 多条件查询关键点在这个位置传如的字典前⾯⼀定要加上两个星号.
user_order_info = UserTable.objects.filter(**search_dict)
# 序列化
data_info = [_dict() for user_order in user_order_info]
data = {
'code': 200,
'data_info': data_info
}
return JsonResponse(data)
Models见上⼀篇⽂章
前端html页⾯
<head>
// 使⽤jquery就必须引⼊
<script src="/static/admin/js/jquery.js" type="text/javascript"></script>
// 需要使⽤ajaxSubmit去提交表单就必须引⼊
<script src="/static/admin/js/jquery.form.min.js" type="text/javascript"></script>
// 使⽤template.js渲染页⾯就必须引⼊
<script src="/static/admin/js/template.js" type="text/javascript"></script>
<script src="/static/admin/js/order_list.js" type="text/javascript"></script>
</head>
<div class="wrap">
<div class="page-title">
<span class="modular fl"><i class="order"></i><em>查询还款案件</em></span>
django前端模板</div>
<div class="operate">
<form id="search-order">
{% csrf_token %}
<div>
<div >
<label for="">客户单号:</label>
<input type="text" class="textBox length-long " name="case_order" value=""/>
<label for="">客户名称:</label>
<input type="text" class="textBox length-long " name="case_name" value=""/>
</div>
<div >
<label for="">⾝份证号:</label>
<input type="text" class="textBox length-long " name="idno" value=""/>
<label for="">贷款⽇期:</label>
<input type="text" class="textBox length-long" id="datepicker" name="loan_date" value=""/>
</div>
<div >
<label for="">处理状态:</label>
<select class="inline-select textBox length-long" name="state">
<option value="未处理">未处理</option>
<option value="已处理">已处理</option>
</select>
<label for="">贷款项⽬:</label>
<select class="inline-select textBox length-long" name="dk_type">
<option value="POS贷">POS贷</option>
<option value="现⾦贷">现⾦贷</option>
</select>
<div >
<input type="submit" value="查询" class="tdBtn"/>
</div>
</div>
</div>
</form>
</div>
<table class="list-style Interlaced" id="test">
<tr>
<th>申请编号</th>
<th>客户名称</th>
<th>联系⽅式</th>
<th>⾝份证号码</th>
<th>办理⽇期</th>
<th>处理⼈</th>
<th>处理状态</th>
<th>处理时间</th>
<th>操作</th>
</tr>
{% verbatim %}
<script type="text/html" id="tr_list">
{{ each users as user }}
<tr>
<td>
<input type="checkbox"/>
<a href="/admin/order_detail/?id={{ user.user_id }}" rel="external nofollow" rel="external nofollow" >            <span>{{ user.loan_id }}</span>
</a>
<td class="center">
<span class="block">{{ user.name }}</span>
</td>
<td width="200" >
<span class="block">{{ user.phone }}</span>
</td>
<td class="center">
<span>{{ user.card }}</span>
</td>
<td class="center">
<span>{{ user.date }}</span>
</td>
<td class="center">
<span>{{ user.deal_peo }}</span>
</td>
<td class="center">
<span>{{ user.status }}</span>
</td>
<td class="center">
<span>{{ user.deal_time }}</span>
</td>
<td class="center">
<a href="/admin/order_detail/?id={{ user.user_id }}" rel="external nofollow" rel="external nofollow" class="inline-block" title="查看案件"><img              src="/static/admin/images/icon_view.gif"/></a>
<a class="inline-block" title="删除案件">
<img src="/static/admin/images/icon_trash.gif"/>
</a>
</td>
</tr>
{{ /each }}
</script>
{% endverbatim %}
</table>
<!-- BatchOperation -->
<div >
<!-- Operation -->
<div class="BatchOperation fl">
<input type="checkbox" id="del"/>
<label for="del" class="btnStyle middle">全选</label>
<a href="/admin/export_excel/" rel="external nofollow" ><button id="export_excel" type="button" class="btnStyle" >导出excel</button></a>      <input type="button" value="删除案件" class="btnStyle"/>
</div>
后端搞定了就可以在前端写ajax去渲染页⾯了.
$(function () {
var token = $(':input[name="csrfmiddlewaretoken"]').val()
$('#search-order').submit(function () {
$(this).ajaxSubmit({
url: '/admin/order_list/',
dataType: 'json',
type: 'POST',
headers: {'X-CSRFToken': token},
success: function (data) {
if (de == 200) {
var html ='<tr>\n' +
'      <th>申请编号</th>\n' +
'      <th>客户名称</th>\n' +
'      <th>联系⽅式</th>\n' +
'      <th>⾝份证号码</th>\n' +
'      <th>办理⽇期</th>\n' +
'      <th>处理⼈</th>\n' +
'      <th>处理状态</th>\n' +
'      <th>处理时间</th>\n' +
'      <th>操作</th>\n' +
'    </tr>'
var tr_html = template('tr_list', {users: data.data_info})
html += tr_html
$('#test').html(html)
}
}
})
// 阻⽌默认提交
})
})
总结：
重点就在怎么构建字典后最后构建好的字段如何传参的问题.
以上这篇解决Django中多条件查询的问题就是⼩编分享给⼤家的全部内容了，希望能给⼤家⼀个参考，也希望⼤家多多⽀持。