如何解决查询500中的错误500？

Question

我想列出保存在名为“ related”的数据库字段中的相关类别我的代码def category(request, slug):    related = Article.objects.filter(slug__icontains=slug).values('related').first()return render(request,'category.html',{'related':related}y尝试：选项1：如果有退货，则相关无我仅分配类别Article.objects.filter(Q(slug__icontains=slug) | Q(category__icontains=slug))选项2：if related is None:    related = Article.objects.filter(category__icontains=slug).values('category').first()    else:    related = related.get('related').split(',')错误：'NoneType'对象没有属性'get'在我的数据库中，我检查了以下查询：SELECT * FROM `article` WHERE slug like '%internet%'而且我得到0条记录，所以错误是连贯的，但是在这种情况下我看不到如何分配SELECT * FROM `article` WHERE category like '%internet%'我有22个结果模型：class Article(models.Model):    category = models.CharField(max_length=2000, blank=True, null=True)    related = models.CharField(max_length=2000, blank=True, null=True)    text = models.CharField(max_length=2000, blank=True, null=True)    slug= models.SlugField(max_length=255, unique=True)    class Meta:        managed = False        db_table = 'article'    def __str__(self):        return u'%s %s %s %s' % (self.categoria,self.related, self.text, self.slug)选项3：Article.objects.filter(Q(slug__icontains=slug) | Q(category__icontains=slug)).values_list("related", flat=True).distinct()错误太多值以至于无法解包（预期2）错误行37与此：relateds = related.get（'related'）。split（'，'）所有过程：def category(request, slug):    related = Article.objects.filter(Q(slug__icontains=slug) | Q(category__icontains=slug)).values('related').distinct()temp=[]    for x in relateds:        temp.append(x.replace(" ","-").replace("é","e"))    relateds=temp

Answer 1

使用选项2，您可以尝试这种方式

related = Article.objects.filter(slug__icontains=slug).values('category').first()  

if not related:

    related = Article.objects.filter(category__icontains=slug).values('category').first()