1

我正在尝试为我的结果创建过滤器，该过滤器将从 html 表单中获取多个值。当前的设置为我提供了诸如 /?language=French&language=German 之类的 URL，但是结果不会显示法语和德语记录，而只会显示法语。此外，添加新的过滤条件，例如 "level" /?language=French&level=Beginner 也不起作用。

有人可以帮我指出正确的方向吗？

谢谢西科尔

我的表格如下所示：

RESOURCES_LANGUAGE =        (('English', 'English'),
                            ('Spanish', 'Spanish'),
                            ('French', 'French'),
                            ('German', 'German'))

RESOURCES_LEVEL =           (('Beginner', 'Beginner'),
                            ('Intermediate', 'Intermediate'),
                            ('Advanced', 'Advanced'))

SORTBY =                    (('likes', 'Likes'),
                            ('name', 'Name'),
                            ('latest', 'Latest'))

class FiltersAndSortingForm(forms.Form): 
    language = forms.MultipleChoiceField(required=False, label='Language', widget=forms.CheckboxSelectMultiple, choices=RESOURCES_LANGUAGE)
    level = forms.MultipleChoiceField(required=False, label='Level', widget=forms.CheckboxSelectMultiple, choices=RESOURCES_LEVEL)
    provider = forms.ModelMultipleChoiceField(queryset=Provider.objects.all().order_by('name'), label='Provider', required=False,)
    sortby = forms.MultipleChoiceField(required=False, label='Sort by', widget=forms.CheckboxSelectMultiple, choices=SORTBY)

我的观点：

def resources(request):
    if request.GET:
        language = request.GET.get('language', '')
        level = request.GET.get('level', '')
        provider = request.GET.get('provider', '')  

        sortby = request.GET.get('sortby', '')
        if sortby == 'name':
            orderby = 'name'
        elif sortby == 'latest':
            orderby = '-dt_added'
        elif sortby == 'likes':
            orderby = '-facebook_likes'
        else:
            orderby = '-facebook_likes'    

        qset = (
            Q(language=language) 
#            & 
#            Q(level=level) 
            )

        resources = Resource.objects.filter(inactive=0).filter(qset).order_by(orderby)
        form = FiltersAndSortingForm()
    else:
        form = FiltersAndSortingForm()
        resources = Resource.objects.filter(inactive=0).order_by('-facebook_likes')
4

2 回答 2

1

好的，最终在查看了这个线程django 使用 q 对象动态过滤之后，我让它像这样工作。也许这不是最干净的方式，但似乎它正在完成这项工作。除非有人能提出更好的解决方案？

谢谢-s

def resources(request):
    if request.GET:
        type = request.GET.getlist('type', '')
        language = request.GET.getlist('language', '')
        level = request.GET.getlist('level', '')
        provider = request.GET.getlist('provider', '')  

        sortby = request.GET.get('sortby', '')
        if sortby == 'name':
            orderby = 'name'
        elif sortby == 'latest':
            orderby = '-dt_added'
        elif sortby == 'likes':
            orderby = '-facebook_likes'
        else:
            orderby = '-facebook_likes'  

        qset_type = Q() # Create an empty Q object to start with
        for x in type:
            qset_type |= Q(provider__tags__name=x) # 'or' the Q objects together

        qset_language = Q() 
        for x in language:
            qset_language |= Q(language=x) 

        qset_level = Q() 
        for x in level:
            qset_level |= Q(level=x) 

        qset_provider = Q() 
        for x in provider:
            qset_provider |= Q(provider=x)    

        qset = qset_language & qset_level & qset_type & qset_provider

        resources = Resource.objects.filter(inactive=0).filter(qset).order_by(orderby)
        form = FiltersAndSortingForm()
    else:
        form = FiltersAndSortingForm()
        resources = Resource.objects.filter(inactive=0).order_by('-facebook_likes')
于 2014-05-04T16:11:00.837 回答
0

我没有看到将其他标准添加到 qset，这就是过滤不适用于这些参数的原因。另外，我建议您使用字典作为搜索条件，然后将其解压缩。查看这个问题以获得详细解释Django：如何在 Q() 语句中使用字符串作为关键字？. 如果您需要任何澄清，请告诉我。

于 2014-05-04T00:47:05.700 回答