DRF 4-8 좋아요

# articles/models.py

from django.db import models
from users.models import User


class Article(models.Model):
    # 한 user가 여러 article. 1:many. FK
    user = models.ForeignKey(User, on_delete=models.CASCADE) # 삭제할 때 없애준다
    title = models.CharField(max_length=50)
    content = models.TextField()
    image = models.ImageField(blank=True, upload_to='%Y/%m/')
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    likes = models.ManyToManyField(User, related_name="like_articles") # 추가
     
    def __str__(self):
        return str(self.title)

ManyToMany를 쓸 때는 related_name을 설정해주는 게 좋다.

• user에 있는 default값과 중복을 방지하기 위해

위와 같이 설정하면 user.like_articles로 '좋아요 개수' 구할 수 있다.

• user.article_set 하면 user가 작성한 게시글이 표시된다.
  
  

모델을 만들었으니 makemigrations, migrate 하면
admin에서 like 옵션이 생긴 것을 확인할 수 있다.

이제 urls와 views를 만든다.

# articles/urls.py

from django.urls import path 
from articles import views


urlpatterns = [
    path('', views.ArticleView.as_view(), name='article_view'),
    path('<int:article_id>/', views.ArticleDetailView.as_view(), name='article_detail_view'),
    path('<int:article_id>/comment/', views.CommentView.as_view(), name='comment_view'),
    path('<int:article_id>/comment/<int:comment_id>', views.CommentDetailView.as_view(), name='comment_detail_view'),
    path('<int:article_id>/like/', views.LikeView.as_view(), name='like_view'),

# articles/views.py

from rest_framework.generics import get_object_or_404
from rest_framework.views import APIView
from rest_framework import status, permissions
from rest_framework.response import Response
from articles.models import Article, Comment
from articles.serializers import ArticleSerializer, ArticleListSerializer, ArticleCreateSerializer, CommentSerializer, CommentCreateSerializer


# 토글 로직 (했으면 빼고, 안 했으면 넣고)
class LikeView(APIView):
    def post(self, request, article_id):
        article = get_object_or_404(Article, id=article_id) # 게시글 받아오기
        # request 유저가 글 좋아요 한 사람들 중에 있다면 빼주기
        if request.user in article.likes.all():
            article.likes.remove(request.user) # models에 있는 클래스article의 likes
            return Response("언팔로우 했습니다.", status=status.HTTP_200_OK)
        else:
            article.likes.add(request.user)
            return Response("팔로우 했습니다.", status=status.HTTP_200_OK)