使用get_queryset在CreateView中过滤模型 [英] Filtering a model in a CreateView with get_queryset

问题描述

我正在尝试使用get_queryset（）过滤模型，它似乎可以在视图中使用，但不能在模板中使用。

我的视图：

  class FolderCreate（CreateView）：
字段= ['name'，'parent'] 
 template_name ='Form /folder_create.html'
 
 def get_queryset（self）：
文件夹= Folder.objects.filter（owner = self.request.user）
打印文件夹＃==> return [<文件夹：文件夹> ;，<文件夹：另一个文件夹>] 
返回文件夹
 
 def form_valid（self，form）：
 self.object = form.save （commit = False）
 self.object.owner = self.request.user 
 return super（FolderCreate，self）.form_valid（form）
 
 def get_initial（self）： 
 if self.request.method =='GET'：
 folderUrl = self.request.META ['HTTP_REFERER']。split（'/'）
 folderUrl.pop（）
文件夹= urllib2.unquote（foldersUrl [-1]）$ ​​b 
 $ b尝试：
 return {'parent'：Folder.objects.get（name = folder，owner = self.request。用户）} 
除Folder.DoesNotExist：
通过
  

如您所见，文件夹在get_queryset（）中返回与会话用户相关的两个对象：文件夹和另一个文件夹

不幸的是，模板的组合框获得了所有文件夹，而没有任何过滤

有什么想法吗？

解决方案

这里的问题是 get_queryset 不在CreateView中使用，因为它用于过滤返回的模型以在列表视图或详细视图中显示。您需要完全不同的东西：您希望过滤表单字段中可用的选择。

为此，您需要创建一个接受<$ c的自定义ModelForm。 $ c> user kwarg并相应地过滤查询集：

  class FolderForm（forms.ModelForm）： 
类元：
模型=文件夹
字段= ['name'，'parent'] 
 
 def __init __（self，* args，** kwargs）： 
 user = kwargs.pop（'user'）
 super（FolderForm，self）.__ init __（* args，** kwargs）
 self.fields ['parent']。queryset =文件夹.objects.filter（user = user）
  

然后更改视图以使用该表格并传递用户参数：

  class FolderCreate（CreateView）：
 template_name ='Form / folder_create.html'
 form_class = FolderForm 
 
 def get_form_kwargs（self）：
 kwargs = super（FolderCreate，self）.get_form_kwargs（）
 kwargs [’user’] = self.request.user 
 return kwargs 
  

I'm trying to filter a model with get_queryset() and it seems to work in the view but not in the template.

My view :

class FolderCreate(CreateView):
    fields = ['name', 'parent']
    template_name = 'Form/folder_create.html'

    def get_queryset(self):
        folders = Folder.objects.filter(owner=self.request.user) 
        print folders # ==> return [<Folder: Folder>, <Folder: Another folder>]
        return folders

    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.owner = self.request.user
        return super(FolderCreate, self).form_valid(form)

    def get_initial(self):
        if self.request.method == 'GET':
            foldersUrl = self.request.META['HTTP_REFERER'].split('/')
            foldersUrl.pop()
            folder = urllib2.unquote(foldersUrl[-1])

            try:
                return {'parent' : Folder.objects.get(name=folder, owner=self.request.user)}
            except Folder.DoesNotExist:
                pass

As you can see, folders return two objects related to the session user in get_queryset() : 'Folder' and 'Another folder

Infortunately, the combobox of my template get all the folders, without any filtering.

Any idea ?

解决方案

The issue here is that get_queryset is not used in a CreateView, as it's meant for filtering the models returned for display in a list or detail view. You want something completely different: you want to filter the choices available in a form field.

To do that you will need to create a custom ModelForm that accepts a user kwarg and filters the queryset accordingly:

class FolderForm(forms.ModelForm):
    class Meta:
       model = Folder
       fields = ['name', 'parent']

    def __init__(self, *args, **kwargs):
       user = kwargs.pop('user')
       super(FolderForm, self).__init__(*args, **kwargs)
       self.fields['parent'].queryset = Folder.objects.filter(user=user)

and then change your view to use that form and pass in the user parameter:

class FolderCreate(CreateView):
    template_name = 'Form/folder_create.html'
    form_class = FolderForm

    def get_form_kwargs(self):
        kwargs = super(FolderCreate, self).get_form_kwargs()
        kwargs['user'] = self.request.user
        return kwargs

这篇关于使用get_queryset在CreateView中过滤模型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！