Implemented an up vote(like) system for the blog comments

.vscode/settings.json

@@ -1,3 +1,3 @@
 {
-    "python.pythonPath": "/usr/local/bin/python3"
+    "python.pythonPath": "/usr/bin/python3"
 }

README.md

@@ -451,7 +451,8 @@ Simplified tree diagram
     "updated": time.current, 
     "anonymous": BOOLEAN,
     "publish": BOOLEAN,
-    "comments" : NUM_COMMENTS
+    "comments" : NUM_COMMENTS,
+    "likes": NUM_OF_LIKES
 
  } 
 
@@ -484,7 +485,8 @@ Simplified tree diagram
     "updated": time.current, 
     "anonymous": BOOLEAN,
     "publish": BOOLEAN,
-    "comments" : NUM_COMMENTS
+    "comments" : NUM_COMMENTS,
+    "likes": NUM_OF_LIKES
 
  } 
   ```
@@ -536,7 +538,8 @@ returns
     "updated": time.current, 
     "anonymous": BOOLEAN,
     "publish": BOOLEAN,
-    "comments" : NUM_COMMENTS
+    "comments" : NUM_COMMENTS,
+    "likes": NUM_OF_LIKES
 } 
 ```
 
@@ -558,12 +561,45 @@ returns
       }
   ```
 
+### Like a Blog Post 
+PATCH /blogs/id/<BLOG_ID>/likes/  
+like the post if the user hasn't liked this post yet. Cancel the like if the user has already liked the post.  
+returns
+```javascript
+{
+    "id": BLOG.ID,
+    "author": "FIRST_NAME + LAST_NAME,
+    "user": USER.ID,
+    "body": UPDATED_BODY,
+    "title": UPDATED_TITLE,
+    "images": [
+        {
+            "id": IMAGE.ID,
+            "filename": FILENAME,
+            "blog": BLOG.ID,
+            "picture": FILEURL,
+        },
+        .
+        .
+        .
+    ],
+    "published": time.publish,
+    "created": time.created,
+    "updated": time.current, 
+    "anonymous": BOOLEAN,
+    "publish": BOOLEAN,
+    "comments" : NUM_COMMENTS,
+    "likes": NUM_OF_LIKES
+}
+```
+
+
 
 ### Create Comment 
   POST /blogs/comment/
 
   Enter blog or comment id to associate created comment with blog or comment.
-  Enter type <STRING> either 'blog' or 'post'
+  Enter type <STRING> either 'blog' or 'comment'
   Comments are connected like a single-directional tree with a blog root node.
 
   ```

src/blog/migrations/0006_blogpost_likes.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.7 on 2020-05-27 21:07
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('blog', '0005_auto_20190527_0852'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='blogpost',
+            name='likes',
+            field=models.ManyToManyField(blank=True, to=settings.AUTH_USER_MODEL),
+        ),
+    ]

src/blog/models.py

@@ -24,6 +24,7 @@ class BlogPost(models.Model):
     updated = models.DateTimeField(auto_now=True,editable=False)
     publish = models.BooleanField(default=False)
     anonymous = models.BooleanField(default=False)
+    likes = models.ManyToManyField(User, blank=True)
 
     class Meta:
         ordering = ('-publish',)
@@ -36,6 +37,10 @@ def getComments(self):
             return self.commentblog.all().count()
         else:
             return 0
+
+    @property
+    def getLikes(self):
+        return self.likes.count()
 
 
 class BlogPicture(models.Model):

src/blog/serializers.py

@@ -15,10 +15,11 @@ class Meta:
 
 class BlogPostSerializer(serializers.ModelSerializer):
     comments = serializers.IntegerField(source='getComments')
+    likes = serializers.IntegerField(source='getLikes')
     images = BlogPictureSerializer(many=True)
     class Meta:
         model = BlogPost
-        fields = ('id','author','user','body','title','images','publish','anonymous','created','published','updated','comments')
+        fields = ('id','author','user','body','title','images','publish','anonymous','created','published','updated','comments', 'likes')
         read_only_fields = ('id','anonymous','created','updated')
 
 

src/blog/urls.py

@@ -7,6 +7,7 @@
             url(r'^blogs/comment/?$', views.CreateCommentView.as_view(),name='createcomment'),
             url(r'^blogs/comment/id/(?P<comment_id>[0-9]+)/?$', views.RUDCommentView.as_view(),name='RUDComment'),
             url(r'^blogs/comment/id/(?P<comment_id>[0-9]+)/likes/?$',views.UpdateCommentLikesView.as_view(),name='commentlikes'),
+            url(r'^blogs/id/(?P<blog_id>[0-9]+)/likes/?$',views.UpdateBlogLikesView.as_view(),name='bloglikes'),
             url(r'^blogs/(?P<username>[\w.@+-]+)/?$', views.CreateBlogView.as_view(), name="createview"),
             url(r'^blogs/?$', views.BlogView.as_view(), name='blogs'),
             url(r'^blogs/id/(?P<blog_id>[0-9]+)/?$', views.RUDBlogView.as_view(), name='RUDBlog'),

src/blog/views.py

@@ -160,7 +160,7 @@ def post(self, request):
             if(blogpost != None):
                 new_comment = Comment.objects.create(
                             user = self.request.user,
-                            author=self.request.user.first_name + ' ' + request.user.last_name,
+                            author=self.request.user.first_name + ' ' + self.request.user.last_name,
                             blog = blogpost,
                             body = self.request.data['body'],
                         )
@@ -175,7 +175,7 @@ def post(self, request):
             if(commentpost != None):
                 new_comment = Comment.objects.create(
                         user = self.request.user,
-                        author=self.request.user.first_name + ' ' + request.user.last_name,
+                        author=self.request.user.first_name + ' ' + self.request.user.last_name,
                         comment = commentpost,
                         body = self.request.data['body'],
                     )
@@ -247,6 +247,25 @@ def get_queryset(self):
             queryset = queryset.all()[:num]
         return queryset
 
+#Increment or decrement likes
+class UpdateBlogLikesView(generics.UpdateAPIView):
+    serializer_class = BlogPostSerializer
+    queryset = BlogPost.objects.all()
+
+
+
+    def update(self, request, *args, **kwargs):
+        blog = get_object_or_404(BlogPost, id=int(self.kwargs['blog_id']))
+
+        if(blog.likes.filter(id = self.request.user.id).exists()):
+            blog.likes.remove(self.request.user)
+        else:
+            blog.likes.add(self.request.user)
+
+
+        return Response(BlogPostSerializer(blog).data, status=200)
+
+
 #Increment or decrement likes
 class UpdateCommentLikesView(generics.UpdateAPIView):
     serializer_class = CommentSerializer