【发布时间】：2020-05-03 23:30:35
【问题描述】：
我遇到的第一个问题是，每当我尝试删除评论时，我也会尝试在 post.cmets 中找到该特定评论的索引在 user.cmets 内部，它始终返回 -1，我之所以试图找到它，是为了让我可以从用户和帖子所拥有的 cmets 数组中拼接它。 我遇到的 second 问题是，每当我创建评论时，我都会尝试将其存储在用户和帖子拥有的 cmets 数组中，但它仅将其存储为字符串，尽管我认为它是应该存储为对象吧？，所以我以后可以通过填充来访问它？
我已经挣扎了好几天了，现在很沮丧为什么它不起作用。请帮帮我！
以下将是我的两条路线，用于删除和创建 cmets，以及我的 Schema，谢谢大家的帮助！
创建评论
// @route POST api/posts/comment/:id
// @desc Comment on a post
// @access Private
router.post(
'/comment/:id',
[
auth,
[
check('text', 'Text is required')
.not()
.isEmpty()
]
],
async (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
try {
const post = await Post.findById(req.params.id);
const user = await User.findById(req.user.id)
const newComment = {
text: req.body.text,
post: post._id,
user: req.user.id
};
const comment = new Comment(newComment);
post.comments.unshift(comment._id);
user.comments.unshift(comment._id)
console.log(user.comments);
console.log(post.comments);
console.log(comment)
await post.save();
await comment.save();
await user.save();
res.json(comment);
} catch (err) {
console.error(err.message);
res.status(500).send('Server Error');
}
}
);
删除 cmets
// @route DELETE api/posts/comment/:id/:comment_id
// @desc Delete comment
// @access Private
router.delete('/comment/:id/:comment_id', auth, async (req, res) => {
try {
const post = await Post.findById(req.params.id);
const user = await User.findById(req.user.id);
// Pull out comment by finding it through its id
const comment = await Comment.findById(req.params.comment_id);
// Make sure comment exists
if (!comment) {
return res.status(404).json({ msg: 'Post do not have this comment' });
}
// Check user
if (comment.user.toString() !== req.user.id) {
return res.status(401).json({ msg: 'User not authorized' });
}
// Get The value to be removed
const postCommentIndex = post.comments.findIndex(postComment => postComment === comment._id);
const userCommentIndex = user.comments.findIndex(userComment => userComment === comment._id);
console.log(`This is the post comment index ${postCommentIndex}`);
console.log(`This is the user comment index ${userCommentIndex}`);
post.comments.splice(postCommentIndex, 1);
user.comments.splice(userCommentIndex, 1);
// save user and post
await post.save();
await user.save();
await comment.remove();
// resend the comments that belongs to that post
res.json(post.comments);
} catch (err) {
console.error(err.message);
res.status(500).send('Server Error');
}
});
架构：
const mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
name: {
type: String,
required: true
},
email: {
type: String,
required: true,
unique: true
},
password: {
type: String,
required: true
},
avatar: {
type: String
},
posts: [{type: mongoose.Schema.Types.ObjectId, ref: "Post"}],
comments: [{type: mongoose.Schema.Types.ObjectId, ref: "Comment"}],
date: {
type: Date,
default: Date.now
}
});
module.exports = mongoose.model('User', UserSchema);
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const PostSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'User'
},
text: {
type: String,
required: true
},
likes: [
{
user: {
type: Schema.Types.ObjectId,
ref: 'User'
}
}
],
dislikes: [
{
user: {
type: Schema.Types.ObjectId,
ref: "User"
}
}
],
comments: [{type: Schema.Types.ObjectId, ref: "Comment"}],
date: {
type: Date,
default: Date.now
}
});
module.exports = mongoose.model('Post', PostSchema);
const mongoose = require("mongoose")
const Schema = mongoose.Schema;
const CommentSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'User'
},
post: {
type: Schema.Types.ObjectId,
ref: "Post"
},
text: {
type: String,
required: true
},
date: {
type: Date,
default: Date.now
}
})
module.exports = mongoose.model("Comment", CommentSchema);
【问题讨论】：
标签： javascript node.js mongodb express mongoose