Django的自动填充灯柱4次在自动完成形式

我创建这个模型中创建新的选择时：Django的自动填充灯柱4次在自动完成形式

class TitleDescriptionLazyModel(models.Model): 

class Meta: 
    abstract = True 

title = models.CharField(max_length=255) 
description = models.TextField(blank=True) 

def __str__(self): 
    return self.title 

class Jobsite(TitleDescriptionLazyModel): 
    pass

如文档（views.py）中描述，其在此自动填充视图中使用：

class JobsiteAutocomplete(LoginRequiredMixin, autocomplete.Select2QuerySetView): 

def get_queryset(self): 
    if not self.request.user.is_authenticated(): 
     return Jobsite.objects.none() 

    qs = Jobsite.objects.all() 

    if self.q: 
     qs = qs.filter(title__istartswith=self.q) 

    return qs

和我的urls.py有设置为 “create_field” 的标题字段：

urlpatterns = [ 
    JobsiteAutocomplete.as_view(create_field='title'), name='jobsite_autocomplete'), 
]

但是，当我运行它，我得到传递GET请求自动完成视图，直到我点击创建按钮，此时它员额4次在数据库中创建4个新项目时，我希望它来创建1：

> [22/Aug/2016 20:44:04] "GET /worklogs/jobsite-autocomplete/ HTTP/1.1" 200 356 
[22/Aug/2016 20:44:10] "GET /worklogs/jobsite-autocomplete/?q=som HTTP/1.1" 200 252 
[22/Aug/2016 20:44:11] "GET /worklogs/jobsite-autocomplete/?q=some HTTP/1.1" 200 254 
[22/Aug/2016 20:44:12] "GET /worklogs/jobsite-autocomplete/?q=somewhere HTTP/1.1" 200 116 
[22/Aug/2016 20:44:13] "POST /worklogs/jobsite-autocomplete/ HTTP/1.1" 200 31 
[22/Aug/2016 20:44:13] "POST /worklogs/jobsite-autocomplete/ HTTP/1.1" 200 31 
[22/Aug/2016 20:44:13] "POST /worklogs/jobsite-autocomplete/ HTTP/1.1" 200 31 
[22/Aug/2016 20:44:13] "POST /worklogs/jobsite-autocomplete/ HTTP/1.1" 200 31