Restricted user to only like once

blogproject/blogapp/admin.py

@@ -1,5 +1,5 @@
 from django.contrib import admin
-from .models import Post, Comment, Category
+from .models import Post, Comment, Category,PostLiked
 
 class PostAdmin(admin.ModelAdmin):
     list_display = ['title', 'get_full_name', 'post_date', 'category', 'nr_comments', 'likes', 'visible']
@@ -20,6 +20,13 @@ class CommentAdmin(admin.ModelAdmin):
     list_display = ['author', 'post', 'comment_date', 'visible']
     search_fields = ['author', 'post__title']
 
+
+@admin.register(PostLiked)
+class PostLikedAdmin(admin.ModelAdmin):
+    list_display = ['name', 'post_id', ]
+    search_fields = ['name', 'post_id']
+
+
 @admin.register(Category)
 class CategoryAdmin(admin.ModelAdmin):
     list_display = ['name', 'get_nr_posts', 'nr_comments', 'nr_likes']

blogproject/blogapp/models.py

@@ -24,6 +24,12 @@ def __str__(self):
     def get_absolute_url(self):
         return reverse('blog:PostDetailView', args=[self.pk])
 
+
+class PostLiked(models.Model):
+    name = models.ForeignKey(User, on_delete=models.CASCADE)
+    post_id = models.CharField(max_length=(5),blank=True)
+
+
 class Comment(models.Model):
     body = models.TextField()
     author = models.CharField(max_length=128)

blogproject/blogapp/views.py

@@ -5,7 +5,7 @@
 from django.views.generic import ListView
 from django.views.generic import CreateView, UpdateView
 from django.contrib import messages
-from .models import Post, Comment, Category
+from .models import Post, Comment, Category,PostLiked
 from django.contrib.auth import authenticate, login, logout
 
 def MainView(request):
@@ -36,11 +36,18 @@ def PostDetailView(request, pk):
         return redirect('compapp:NoAccess')
 
 def LikePost(request, pk):
+    user = request.user
     post = Post.objects.get(pk=pk)
-    post.likes = post.likes + 1
-    post.save()
-    messages.info(request, 'I\'m glad you liked the article. Thank you for reading!')
-    return redirect('blog:PostDetailView', pk)
+    postlike = PostLiked.objects.filter(name=user,post_id=pk).exists()
+    if postlike:
+        return redirect('blog:PostDetailView', pk)
+    else:
+        likeduser = PostLiked.objects.create(name=user,post_id=pk)
+        likeduser.save()
+        post.likes = post.likes + 1
+        post.save()
+        messages.info(request, 'I\'m glad you liked the article. Thank you for reading!')
+        return redirect('blog:PostDetailView', pk)
 
 @method_decorator(login_required(), 'dispatch')
 class PostCreateView(CreateView):