[英]How to add likes to my blog posts using generic relationships in Django
I'm trying to add a like/dislike functionality in Django using generic relationships.我正在尝试使用通用关系在 Django 中添加喜欢/不喜欢的功能。 Can someone help me?
有人能帮我吗?
My post model我的帖子 model
class Post(models.Model):
title = models.CharField(max_length=225)
post_image = models.ImageField(null=True, blank=True, upload_to="images/")
author = models.ForeignKey(User, on_delete=models.CASCADE)
body = models.TextField()
post_date = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.title + ' | ' + str(self.author)
class Meta:
ordering = ['-post_date',]
def get_absolute_url(self):
return reverse('post-detail', args=(str(self.id)),)
Thanks in advance!提前致谢!
Create a new class like below:创建一个新的 class,如下所示:
class LikedPost(models.Model):
user = models.ForeignKey(User,on_delete=models.CASCADE)
post = models.ForeignKey(Post, on_delete=models.CASCADE)
liked_date = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.post.title + " liked by " + self.user.username
Then, whenever a user hit like
button, do create a new LikedPost
if not exist a user
liking that post
for like
function, else remove that LikedPost
for dislike
function.然后,每当用户点击
like
按钮时,如果不存在喜欢该post
的user
like
LikedPost
,请创建一个新的 LikedPost,否则删除该LikedPost
dislike
function。
@login_required
def hit_like_button(request, pk):
# Get the id of post
post = get_object_or_404(Post, pk=pk)
# Create a new LikedPost if this post is not liked by this user.
liked_post, created = LikedPost.objects.get_or_create(
post=post,
user=request.user
)
# If not created new LikedPost <=> exist LikedPost = dislike.
if not created: #If get_or_create() function not created a new LikedPost
liked_post.delete()
messages.info(request, "This post was disliked.")
else: # If created a new LikedPost => this user did not like this post
liked_post.save()
messages.info(request, "This post was liked.")
return redirect('home')
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