Django 按类别过滤

Question

我想看具体的分类 post, 我创建了类别应用程序和博客 app.i 想要在 home.html.that 中显示前 5 或 10 post 这就是我需要 4 个特定类别的原因。但我无法从 post model.i 中过滤（类别） model.i 无法访问类别，因为我创建了另一个应用程序..

我想按类别过滤。

model.py for category

class Category(models.Model):
 parent = models.ForeignKey('self', related_name='children', on_delete=models.CASCADE, blank = True, null=True)
 category_name = models.CharField(max_length=50,unique=True)
 slug = models.SlugField(allow_unicode=True,max_length=100,unique=True)
 description =models.TextField(max_length=300,blank=True)
 cat_image = models.ImageField(upload_to = 'photo/categories',blank = True)
 created_at = models.DateTimeField(auto_now_add=True)

model.py for blog

class Post(models.Model):
 title = models.CharField(max_length=200, unique=True)
 slug = models.SlugField(allow_unicode=True, unique=True, max_length=250, null=True, blank=True)
 subtitle = models.CharField(max_length=255, blank=True)
 heder_image =  models.ImageField(null=False,blank=True,upload_to="images/")
 heder_image_url =  models.CharField(null=True,blank=True,max_length=200)
 heder_image_Under_line =  models.TextField(null=True,default="image")
 # author = models.ForeignKey(Profile, on_delete=models.PROTECT)
 author = models.ForeignKey(User, on_delete=models.CASCADE)
 updated_on = models.DateTimeField(auto_now= True)
 created_on = models.DateTimeField(auto_now_add=True)
 body   = RichTextField(max_length=100000)
 status = models.IntegerField(choices=STATUS, default=0)
 meta_description = models.TextField(max_length=300, blank=True,default='')
 category = models.ForeignKey(Category,on_delete= models.CASCADE)

views.py

def home(request):
 category = Category.objects.all().filter(parent=None)
 post_by_category = Post.objects.filter(published=True).order_by('-created_on')#filter by category name
 slider = Post.objects.filter(slider=True).order_by('-created_on')


 context = {
      'category':category,
      'post_by_category':post_by_category,
      'slider':slider,
      'counter':Counter,
 }
 return render(request,'home.html',context)

Answer 1

post_by_category = Post.objects.filter(category=Category.objects.get(category_name="aaa"))

如果您想按特定类别名称过滤 post，这应该有效。

Answer 2

Django 还支持 follow relationships when filtering 的特殊 __（双下划线）语法。所以以下也应该有效：

post_by_category = Post.objects.filter(category__category_name="aaa", published=True)

Django 按类别过滤

Django filter by category

python

django

django-templates

django-template-filters