Django搜索＆＃34; DoesNotExist＆＃34;

Question

我使用Django为足球俱乐部建立一个网站，其中包含许多博客文章。我试图加入搜索栏，但我无法使其发挥作用。提交搜索词时，会显示以下错误：

  

在/ web / search /
中不存在   Articulo匹配查询不存在。

这是我的代码：

views.py

def search(request):
    query = request.GET.get('q', '')
    if query:
        try:
            qset = (
                    Articulo(titulo__icontains=query) |
                    Articulo(cuerpo_icontains=query)
            )
            results = Articulo.objects.filter(qset).distinct()
        except Articulo.DoesNotExist:
            results = None
    else:
        results = []
    return render_to_response('web/buscar.html', {"results": results, "query": query})

的index.html

<div id="busqueda" class="row">
    <div class="col-md-12">
        <span id="cruz" class="fas fa-times fa-2x"></span>
        <form method="GET" action="/web/search/" class="form my-2 my-lg-0">
            <input id="searchBox" value="{{ query|escape }}" class="form-control mr-sm-2" type="text" name="q" placeholder="Buscar" aria-label="Buscar">
            <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Buscar</button>
        </form>
    </div>
</div>

urls.py

url(r'^search/$', search),

models.py

class Articulo(models.Model):
    """Un artículo de la página"""
    id = models.AutoField(primary_key=True)
    titulo = models.CharField(max_length=100)
    slug = models.SlugField(unique=True, default="")
    CATEGORIAS = (
        ('Primera y Sub 21', 'Primera y Sub 21'),
        ('Inferiores', 'Inferiores'),
        ('Básquet', 'Básquet'),
        ('Hockey', 'Hockey'),
        ('Gurises', 'Gurises'),
        ('Generales', 'Generales'),
        ('Institucionales', 'Institucionales'),
        ('Senior', 'Senior'),
    )
    categoria = models.CharField(
        max_length=200,
        choices=CATEGORIAS
    )
    cuerpo = RichTextField()
    fecha_hora= models.DateTimeField()
    foto = models.ImageField()
    url_video = models.CharField(help_text='Url del video de facebook (opcional). Para obtener el link, ir al video, apretar donde están los 3 puntitos y poner "insertar". Pegar aquí solo el link del video, borrar el resto. Ejemplo: https://www.facebook.com/plugins/video.php?href=https%3A%2F%2Fwww.facebook.com%2FJuanCruzPiornoOficial%2Fvideos%2F302760100205413', max_length=500,blank=True)
    album_flickr = models.CharField(help_text="Subir fotos a Flickr, crear un álbum, compartirlo eligiendo la opción 'Insertar', elegir el tamaño más grande, y pegar el link aquí", max_length=700, blank=True)
    def save(self, *args, **kwargs):
        self.slug = slugify(self.titulo)

        super(Articulo, self).save(*args, **kwargs)

    def __str__(self):
        return self.titulo

Answer 1

首先你需要导入Q之后你可以查找带有关键字参数的函数（例如filter（），exclude（），get（）

from django.db.models import Q
def search(request):
    query = request.GET.get('q', '')
    if query:
        Articulo.objects.get(
            Q(titulo__icontains=query) |
            Q(cuerpo_icontains=query)
           )
    return query

有关详情，请查看文档here

Answer 2

from django.db.models import Q

def search(request):
    results = []
    query = request.GET.get('q', None)
    if query:
       try:
        results = Articulo.objects.filter(Q(titulo__icontains=query) | Q(cuerpo_icontains=query))
       except Articulo.DoesNotExist:
           pass
    return render_to_response('web/buscar.html',{"results": results, "query": query})

Answer 3

试试这个

def search(request):
    query = request.GET.get('q', '')
    if query:
        try:
            qset = Articulo.objects.filter(Q(titulo__icontains=query) | cuerpo_icontains = query)  # change is here <<
            results = Articulo.objects.filter(some_field=some_value).distinct() # change is here <<
        except Articulo.DoesNotExist:
            results = None
    else:
        results = []
    return render_to_response('web/buscar.html', {"results": results, "query": query})

注意：我不确定您为何使用qset和result！

Answer 4

由于您尝试执行“搜索”（或过滤），您应该使用“fitler（）”而不是get（），它在语义上更有意义。对于您的信息，如果结果为空，则过滤器不会引发异常。 您的代码看起来类似于：

ListView

如果您使用from django.db.models import Q def search(request): results = [] query = request.GET.get('q', '') if query: qset = Q(titulo__icontains=query) | Q(cuerpo__icontains=query) results = Articulo.objects.filter(qset).distinct() ctx = {"results": results, "query": query} return render_to_response('web/buscar.html', ctx) 的代码获得DoesNotExist个例外，则应查看回溯以查找li filter()文件，以确保调用所需的视图而不是其他人。