Django的cmdb探索与开发（三）

关于select下拉框的实现的两种方法，一种为与前端ajax结合二级联动，一种为利用后台from类方法重写。

方法1 ：

models里有Dataroom和Cabinet的类就不用说了。数据库用的是mysql不多做描述。

urls:

    url(r'dataroomselect',dataroomselect),
    url(r'cabinetselect(\d+)', cabinetselect)

View视图:

from django.http import JsonResponse
#机房select
def dataroomselect(request):
    dataroomList = Dataroom.objects.all()
    list1 = []
    for item in dataroomList:
        list1.append([item.basemodel_ptr_id,item.DataroomName])
    print(list1)
    return JsonResponse({'data': list1 })
#机柜select
def cabinetselect(request,pid):
    print(pid)
    cabinetList = Cabinet.objects.filter(DataRoomID=pid)
    list1 = []
    for item in cabinetList:
        list1.append([item.basemodel_ptr_id,item.CabinetName])
    return JsonResponse({'data': list1})

前端html和jq：

                         <div class="span4 field-box">
                                   <label>所属机房:</label>
                                    <div class="ui-select span4">
                                        <select id="dataroomselect">
                                            <option value="">请选择机房</option>
                                        </select>
                                    </div>
                          </div>

                           <div class="span4 field-box">
                                    <label>所属机柜:</label>
                                    <div class="ui-select span4">
                                        <select id="cabinetselect">
                                            <option value="">请选择机柜</option>
                                        </select>
                                    </div>
                           </div>            

 <script>
        $(function () {
            //获取所有机房
            $.get('/user/dataroomselect', function (dic) {
                pro = $('#dataroomselect');
                $.each(dic.data, function (index, item) {
                    pro.append('<option value=' + item[0] + '>' + item[1] + '</option>');
                })
                });
            //获取所选机柜
            $('#dataroomselect').change(function () {
                $.get('/user/cabinetselect' + $(this).val(), function (dict) {
                    city = $('#cabinetselect');
                    city.empty().append('<option value="">请选择机柜</option>');
                    $.each(dict.data, function (index, item) {
                        city.append('<option value=' + item[0] + '>' + item[1] + '</option>');
                    })
                });
            });


            })
    </script>

效果：

方法2 ：

models.py，这里做了三个下拉框，其中设备类型是做的定项下拉，机房和机柜数据是动态下拉获取的是数据库中的数据

class ImportForm(forms.Form):
    Device_type_list = (
        (1, "服务器"),
        (2, "网络设备"),
        (3, "安全设备"),
        (4, "存储设备")
    )
    #固定下拉选项，Device_type为post值，widget为下拉内容，下同。
    device_type = forms.IntegerField(
        widget = forms.Select(choices=Device_type_list)
    )
    #动态不定下拉选项
    Dataroom_list = forms.IntegerField(
    widget=forms.Select()
    )
    def __init__(self,*args,**kwargs):
        super(ImportForm,self).__init__(*args,**kwargs)
        #查询数据库获取下拉内容，根据主键basemodel_ptr_id查询获取name字段。并赋值给选项
        self.fields['Dataroom_list'].widget.choices = Dataroom.objects.all().values_list('basemodel_ptr_id','DataroomName')

class CabinetSelect(forms.Form):
    # 机柜动态不定下拉选项
    Cabinet_list = forms.IntegerField(
        widget=forms.Select()
    )
    def __init__(self, *args, **kwargs):
        super(CabinetSelect, self).__init__(*args, **kwargs)
        # 查询数据库获取下拉内容，根据主键basemodel_ptr_id查询获取name字段。并赋值给选项
        self.fields['Cabinet_list'].widget.choices = Cabinet.objects.all().values_list('basemodel_ptr_id', 'CabinetName')

view.py视图里直接初始化下拉框变量，然后给HTML页面直接调用即可。

def DeviceAdd(request):
    obj = ImportForm(request.POST)if Dataroom.objects.all() and Cabinet.objects.all():
        if request.method == "POST" and request.POST:
            s.DataRoomID = request.POST["Dataroom_list"]
            s.DataRoom = Dataroom.objects.get(basemodel_ptr_id=s.DataRoomID).DataroomName
            s.CabinetID = request.POST["Cabinet_list"]
            s.Cabinetname = Cabinet.objects.get(basemodel_ptr_id=s.CabinetID).CabinetName           return render_to_response("DeviceAdd.html",locals())

html：

<div class="span4 field-box">
                                    <label>所属机房:</label>
                                    <div class="ui-select span4">
                                        <p>{{ obj.Dataroom_list }}</p>
                                    </div>
</div>
 <div class="span4 field-box">
                                    <label>机柜号:</label>
                                    <div class="ui-select span4">
                                        <p>{{ cabinetselect.Cabinet_list }}</p>
                                    </div>
</div>

效果：

很明显。方法1更实用，也更灵活，不过对前端知识有所要求。