node.js - 用户之前是否喜欢该帖子或未使用 Sequelize

Question

目前，当用户喜欢某个帖子时，该喜欢的记录会添加到我的 Likes 表中，其中包含 userId 和 postId。
现在，当用户查看帖子时，我想确定他们之前是否喜欢该帖子。我知道要这样做，我需要在我的 get 请求中在我要求发布信息时确定这一点。
当我调用帖子信息时，我需要检查 Likes 表以获取当前用户的 userId 和当前帖子的 postId 的记录。如果它存在，那么我需要返回一个名为 isLiked 的参数并将其设置为 true，如果它不存在则 isLiked=false。
这是我的 Post 模型:

id: {
  type: Sequelize.INTEGER,
  primaryKey: true,
  autoIncrement: true,
},
title: {
  type: Sequelize.STRING,

},
userId: {
  type: Sequelize.INTEGER,
},
likesCount:{
  type:Sequelize.INTEGER,
  defaultValue:0,
  validate: {
            min: 0,
        }
},

这是我的喜欢模型:

id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER,
 },
 PostId: {
type: Sequelize.INTEGER,
references: {
  model: "Post",
  key: "id",
},
 },
 userId: {
type: Sequelize.INTEGER,
references: {
  model: "User",
  key: "id",
},
 },

这是我的用户模型:

id: {
  type: Sequelize.INTEGER,
  primaryKey: true,
  autoIncrement: true,
},
name: {
  type: Sequelize.STRING,
 },

这是我的协会:

User.hasMany(Post, { foreignKey: "userId" });
Post.belongsTo(User, { foreignKey: "userId" });

Post.hasMany(Likes, { foreignKey: "PostId", targetKey: "id" });
Likes.belongsTo(Post, { foreignKey: "PostId", targetKey: "id" });

User.hasMany(Likes, { foreignKey: "userId", targetKey: "id" });
Likes.belongsTo(User, { foreignKey: "userId", targetKey: "id" });

更新
我一直在研究并发现，因为我正在使用 JWT 中间件来签署我的用户 token ，并且我目前正在检查当前用户是否在喜欢表中有任何记录，我尝试了以下但有人可以告诉我这种方法是否适用正确的？

 router.get("/", async (req, res) => {
    const posts = await Post.findAll({
   order: [["createdAt", "DESC"]],
   include: [
  { model: Post_Image, attributes: ["id", "images"] },
  { model: Likes, attributes: ["id", "PostId", "userId"] },
  ],
  });

 if (!posts) return res.status(404).send();

 const baseUrl = config.get("assetsBaseUrl");

 const plainPosts = posts.map((x) => x.get({ plain: true }));
 const resultPosts = [];
  for (const post of plainPosts) {

 let isLiked = false;
 let like = await Likes.findOne({
where: {
[Op.and]: [{ PostId: post.id) }, { userId: 
req.user.id }],

  },
 });

if (like) isLiked = true;

const { Post_Images, ...postAttributes } = post;
const IMAGES = Post_Images.map((postImage) => ({
  url: `${baseUrl}${postImage.images}_full.jpg`,
  thumbnailUrl: `${baseUrl}${postImage.images}_thumb.jpg`,
}));
resultPosts.push({ ...postAttributes, images: IMAGES, isLiked 
});
}

res.send( resultPosts );

 });

Answer 1

你不需要再次请求 Like，你手​​头上有所有帖子的赞:

for (const post of plainPosts) {
 // check if we have any like among posts' likes that is made by a certain user
 const isLiked = post.Likes.some(x => x.userId === req.user.id);
 const { Post_Images, ...postAttributes } = post;
 ...