Django的自動填充燈柱4次在自動完成形式

我創建這個模型中創建新的選擇時：Django的自動填充燈柱4次在自動完成形式

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

如文檔（views.py）中描述，其在此自動填充視圖中使用：

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有設置爲「create_field」的標題字段：

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

但是，當我運行它，我得到傳遞GET請求自動完成視圖，直到我點擊創建按鈕，此時它員額4次在數據庫中創建4個新項目時，我希望它來創建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