在Python/Django中使用数据库查询进行多列搜索？

我有一个这样的模型：

class Info(models.Model):
    tape_id = models.TextField()
    name = models.TextField()
    video_type = models.TextField()
    date = models.DateTimeField()
    director = models.CharField(max_length=255)
    cameraman = models.CharField(max_length=255)
    editor = models.CharField(max_length=255)
    time_code = models.TextField()
    tag1 = models.TextField()

 if request.method == 'POST':
        search_inp = request.POST['search_box']
        tape_id = Info.objects.filter(tape_id__exact=search_inp)
        res = Info.objects.filter(name__icontains=search_inp)
        res = Info.objects.filter(director__icontains=search_inp)
        res = Info.objects.filter(cameraman__icontains=search_inp)
        total_video = res.count()
        if len(res) == 0 and len(tape_id) == 0 :
            result = "No videos found!!"
            return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
        else:
            date1 = [i.date for i in res]
            date = [i.strftime("%B %d, %Y") for i in date1]
            a = zip(res, date)
            return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
        return HttpResponseRedirect('/')

if request.method == 'POST':
    search_inp = request.POST['search_box']
    res = Info.objects.filter(
        Q(tape_id__exact=search_inp) | 
        Q(name__icontains=search_inp) |
        Q(director__icontains=search_inp) |
        Q(cameraman__icontains=search_inp)
    )
    total_video = res.count()
    if len(res) == 0:
        result = "No videos found!!"
        return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
    else:
        date1 = [i.date for i in res]
        date = [i.strftime("%B %d, %Y") for i in date1]
        a = zip(res, date)
        return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
    return HttpResponseRedirect('/')

用户可以使用相同的搜索输入框从

磁带中搜索id、姓名、导演和摄影师。
我有这样一个搜索视图：

class Info(models.Model):
    tape_id = models.TextField()
    name = models.TextField()
    video_type = models.TextField()
    date = models.DateTimeField()
    director = models.CharField(max_length=255)
    cameraman = models.CharField(max_length=255)
    editor = models.CharField(max_length=255)
    time_code = models.TextField()
    tag1 = models.TextField()

 if request.method == 'POST':
        search_inp = request.POST['search_box']
        tape_id = Info.objects.filter(tape_id__exact=search_inp)
        res = Info.objects.filter(name__icontains=search_inp)
        res = Info.objects.filter(director__icontains=search_inp)
        res = Info.objects.filter(cameraman__icontains=search_inp)
        total_video = res.count()
        if len(res) == 0 and len(tape_id) == 0 :
            result = "No videos found!!"
            return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
        else:
            date1 = [i.date for i in res]
            date = [i.strftime("%B %d, %Y") for i in date1]
            a = zip(res, date)
            return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
        return HttpResponseRedirect('/')

if request.method == 'POST':
    search_inp = request.POST['search_box']
    res = Info.objects.filter(
        Q(tape_id__exact=search_inp) | 
        Q(name__icontains=search_inp) |
        Q(director__icontains=search_inp) |
        Q(cameraman__icontains=search_inp)
    )
    total_video = res.count()
    if len(res) == 0:
        result = "No videos found!!"
        return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
    else:
        date1 = [i.date for i in res]
        date = [i.strftime("%B %d, %Y") for i in date1]
        a = zip(res, date)
        return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
    return HttpResponseRedirect('/')

一开始我以为它会起作用，但事实并非如此。第一个res变量可以包含该值，而最后一个res为空，将返回到
no_results.html
。我想使用相同的输入框部署此搜索。如何使其工作？
建议在
过滤器中应用
或
条件。有关语法，您可以参考

Q(question__startswith='Who') | Q(question__startswith='What')

它将确保您在结果中获得唯一的对象列表。
首先，您需要导入Q以用于或筛选：

from django.db.models import Q

那么您的代码应该如下所示：

class Info(models.Model):
    tape_id = models.TextField()
    name = models.TextField()
    video_type = models.TextField()
    date = models.DateTimeField()
    director = models.CharField(max_length=255)
    cameraman = models.CharField(max_length=255)
    editor = models.CharField(max_length=255)
    time_code = models.TextField()
    tag1 = models.TextField()

 if request.method == 'POST':
        search_inp = request.POST['search_box']
        tape_id = Info.objects.filter(tape_id__exact=search_inp)
        res = Info.objects.filter(name__icontains=search_inp)
        res = Info.objects.filter(director__icontains=search_inp)
        res = Info.objects.filter(cameraman__icontains=search_inp)
        total_video = res.count()
        if len(res) == 0 and len(tape_id) == 0 :
            result = "No videos found!!"
            return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
        else:
            date1 = [i.date for i in res]
            date = [i.strftime("%B %d, %Y") for i in date1]
            a = zip(res, date)
            return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
        return HttpResponseRedirect('/')

if request.method == 'POST':
    search_inp = request.POST['search_box']
    res = Info.objects.filter(
        Q(tape_id__exact=search_inp) | 
        Q(name__icontains=search_inp) |
        Q(director__icontains=search_inp) |
        Q(cameraman__icontains=search_inp)
    )
    total_video = res.count()
    if len(res) == 0:
        result = "No videos found!!"
        return render_to_response('no_results_only.html', {'result':result}, context_instance=RequestContext(request))
    else:
        date1 = [i.date for i in res]
        date = [i.strftime("%B %d, %Y") for i in date1]
        a = zip(res, date)
        return render_to_response('list_videos.html', {'a':a, 'total_video':total_video}, context_instance=RequestContext(request))
    return HttpResponseRedirect('/')

您知道您正在用这些查询中的每一个重写
res
，对吗？无论如何，使用
Q
进行
或
查询。是的，我意识到，我对Q一无所知。谢谢，伙计！就我而言，我该怎么做？Q（Info.objects.filter（tape_id__确切=search_inp））？是的。就这样。非常感谢。