Django：根据产品模型中最终用户的数据动态更新前端下拉列表

我想为用户浏览他们的图书收藏提供下拉过滤器。下拉值目前填充了模型中每个相应的字段值，我只希望用户获得与他们相关的值，例如，我只有出版商与我的书相关联，'Marvel'，所以当我去过滤我的书时，我应该只在出版商下拉列表中看到Marvel。

即使在设置了初始化函数之后，我也无法将用户值传递给表单下拉列表。当我将值传递给表单时，视图中没有'uid'或'user'这样的属性。

Models.py

class ComicInput(models.Model):
Publisher = models.CharField(max_length=20, default='Marvel', choices=Publisher_Choices, null=True, blank=True )
Title = models.CharField(max_length=50,default='', blank=False)
Type = models.CharField(max_length=30, choices=Type_Choices, null=True, blank=True ) #default='Reg'
Number = models.IntegerField(default='', blank=False)
Category = models.CharField( max_length=12,default="Hold",choices=Category_Choices,blank=True, null=True)
uid = models.ForeignKey(User,on_delete=models.CASCADE, editable=False) #default=False, null=True)
def __unicode__(self):
return '%s %s %s' % (self.uid,self.Title, self.Number, self.Grade, self.Series, self.CoverPic, self.Category)
class Meta:
ordering = ('Title', 'Series', 'Number')

Views.py

###################### 收集观众 #############

@login_required(login_url="/login/") 
def ComicInventory(self):
title_list = TitleChoiceField()
publisher_list = PublisherChoiceField()
sellingnotes_list = NotesChoiceField()
category_list = CategoryChoiceField()
if self.GET.get('titles'): # On screen drop down Filter for titles
selected_title = self.GET.get('titles')
displayInventory=ComicInput.objects.filter(Title=selected_title,uid=self.user)
DisplaySumValue=ComicInput.objects.all().filter(Title=selected_title,uid=self.user).aggregate(Sum('Value'))

else:
displayInventory=ComicInput.objects.filter(uid=self.user)
DisplaySumValue=ComicInput.objects.all().aggregate(Sum('Value'))
context = {
'displayInventory': displayInventory,
'DisplaySumValue': DisplaySumValue,
'title_list': title_list,
}
return render(self, 'app/viewer.html',context)

<body>
<h1><Strong>Here are your comics;</Strong></h1>
<div class="panel-heading">
**<!.. this is the Choice Field on HTML ..!>**           
<div class="panel-title pull-left">
<form method="get" action="{% url 'ComicInventory' %}">
{{ category_list }}
<input type="submit" value="Filter">
</form>
</div>

<div class="container">
<table class="table table-striped">
<thead class="thead-dark">
<tr>
<th scope="col">Publisher</th>
<th scope="col">Title</th>
<th scope="col">Number</th>
<th scope="col">Edition</th>
</tr>
</thead>
{% for inv in  displayInventory %}
<tbody class="table table-hover">
<tr>
<td>{{inv.Publisher}}</td>
<td>{{inv.Title}}</td>
<td>{{inv.Number}}</td>
<td>{{inv.Edition}}</td>
alt="{{inv.Publisher}} image",height="60", width="100" /></a></td>
<td> <a href="/edit/{{inv.id}}">Edit</a> </td>
<td> <a href="/delete/{{inv.id}}">Delete</a> </td>

</tr>

{% endfor %}

</tbody>
<tfoot>
<tr>
<td><b>Total Value: {{DisplaySumValue}} </b></td>
</tr>
</tfoot>
</table>

</div>
</body>

编辑Form.py##更新了modelchoicefield，它初始化了self，这样我就可以获取用户并将其传递给视图##

class TitleChoiceField(forms.Form): class Meta: model = ComicInput fields = ('Title', 'uid',) def __init__(self,uid, *args, **kwargs): super(TitleChoiceField, self).__init__(*args, **kwargs) self.fields['titles'].queryset=ComicInput.objects.filter(uid=self.user).values_list("Title", flat=True).distinct().order_by('Title')

Django AttributeError: Form object has no attribute '_errors'

根据上面的帖子更新了表单:

Forms.py
class TitleChoiceField(forms.Form): class Meta: model = ComicInput fields = ('Title','uid',) titles = forms.ModelChoiceField(queryset =ComicInput.objects.all()) def __init__(self, uid=None, *args, **kwargs): super(TitleChoiceField, self).__init__(*args, **kwargs) self.user = uid usrqry = ComicInput.objects.filter(uid=self.user).values_list('Title', flat=True).distinct().order_by('Title') self.fields['titles'].queryset=usrqry

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