使用猫鼬填充时返回空的帖子数组 [英] Returning an empty array of posts when using mongoose populate
本文介绍了使用猫鼬填充时返回空的帖子数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试获取特定用户的帖子.它给我发了空的帖子.这是我的代码.我想我已经正确地引用了所有内容，肯定有一些错误.
I'm trying to get a particular user's posts. It's returning me an empty array of posts. Here's my code. I think I have referenced everything correctly, there must be some mistake.
User model
const Schema = mongoose.Schema
const userSchema = new Schema({
username: { type: String, required: true },
email: { type: String, reuired: true },
password: { type: String, required: true },
posts:[{ type: Schema.Types.ObjectId, ref: "Post" }]
}, { timestamps: true })
Post model
const Schema = mongoose.Schema;
const postSchema = new Schema({
title: { type: String, required: true },
content: { type: String, required: true },
user: { type: Schema.Types.ObjectId, ref: "User" },
}, { timestamps: true }
router.get("/posts/:id", usersController.getUserPosts)
getUserPosts: (req, res) => {
User.findById(req.params.id, async (err, user) => {
if (err) {
return res.status(500).json({ error: "Server error" })
} else if (!user) {
return res.status(400).json({ error: "No user" })
} else if (user) {
user = await User.populate("user", {
path: "posts",
model: "Post"
})
return res.status(200).json({ user })
}
})
}
编辑
数据库中的用户为:
/users/list
{
"users": [
{
"posts": [],
"_id": "5e66496fcaf5d6697ca3fdbc",
"username": "JimmyPage",
"email": "jimmypage@gmail.com",
"password": "$2b$10$mu0IcHADj5YVIT/66EEfPOxL3cvEjqDsnJUcrST8ZcatTOcQ42kn6",
"createdAt": "2020-03-09T13:49:35.834Z",
"updatedAt": "2020-03-09T13:49:35.834Z",
"__v": 0
},
{
"posts": [],
"_id": "5e66499fcaf5d6697ca3fdbe",
"username": "AxlRose",
"email": "axlrose@gmail.com",
"password": "$2b$10$H3X3efz02RonlvNXaRPr2eEbflSiFK1ITFdbyT2igUGDK9gDpIJqO",
"createdAt": "2020-03-09T13:50:23.702Z",
"updatedAt": "2020-03-09T13:50:23.702Z",
"__v": 0
}
]
}
帖子看起来像这样:
/posts/list
{
"posts": [
{
"_id": "5e66498ccaf5d6697ca3fdbd",
"title": "Jimmy Page's post",
"description": "This is Jimmy Page's post",
"user": {
"posts": [],
"_id": "5e66496fcaf5d6697ca3fdbc",
"username": "JimmyPage",
"email": "jimmypage@gmail.com",
"password": "$2b$10$mu0IcHADj5YVIT/66EEfPOxL3cvEjqDsnJUcrST8ZcatTOcQ42kn6",
"createdAt": "2020-03-09T13:49:35.834Z",
"updatedAt": "2020-03-09T13:49:35.834Z",
"__v": 0
},
"createdAt": "2020-03-09T13:50:04.840Z",
"updatedAt": "2020-03-09T13:50:04.840Z",
"__v": 0
},
{
"_id": "5e6649b5caf5d6697ca3fdbf",
"title": "Axl Rose's Post",
"description": "This is Axl Rose's Post",
"user": {
"posts": [],
"_id": "5e66499fcaf5d6697ca3fdbe",
"username": "AxlRose",
"email": "axlrose@gmail.com",
"password": "$2b$10$H3X3efz02RonlvNXaRPr2eEbflSiFK1ITFdbyT2igUGDK9gDpIJqO",
"createdAt": "2020-03-09T13:50:23.702Z",
"updatedAt": "2020-03-09T13:50:23.702Z",
"__v": 0
},
"createdAt": "2020-03-09T13:50:45.751Z",
"updatedAt": "2020-03-09T13:50:45.751Z",
"__v": 0
},
{
"_id": "5e664b7bf120ab6c0d9999c9",
"title": "Jimmy Page's second post",
"description": "This is Jimmy Page's second post\n\n",
"user": {
"posts": [],
"_id": "5e66496fcaf5d6697ca3fdbc",
"username": "JimmyPage",
"email": "jimmypage@gmail.com",
"password": "$2b$10$mu0IcHADj5YVIT/66EEfPOxL3cvEjqDsnJUcrST8ZcatTOcQ42kn6",
"createdAt": "2020-03-09T13:49:35.834Z",
"updatedAt": "2020-03-09T13:49:35.834Z",
"__v": 0
},
"createdAt": "2020-03-09T13:58:19.261Z",
"updatedAt": "2020-03-09T13:58:19.261Z",
"__v": 0
}
]
}
我在问题中添加了上面的代码.我一直被困在这个位置，就像我试图在他的个人资料中显示用户的帖子，并计划显示所有显示的用户帖子的全局供稿一样.
I've added the above code in my question. I've been stuck in this like forever like I'm trying to show user's posts in his profile and also planning to show the global feed of all user's posts showing.
如果您能帮助我，那将是很棒的.我会很感激的.谢谢.
It will be great if you could help me out. I will really appreciate it. THANKS.
列表帖子控制器是这样的:
listposts: (req, res) => {
Post.find({}, async (error, posts) => {
if (error) {
return res.status(500).json({ error: "something went wrong" })
} else if (!posts) {
return res.status(400).json({ msg: "sorry no posts" })
} else if (posts) {
posts = await Post.populate(posts, {
path: 'user',
model: 'User'
});
return res.status(200).json({ posts })
}
})
}
用户文档:
{
"_id" : ObjectId("5e66496fcaf5d6697ca3fdbc"),
"posts" : [ ],
"username" : "JimmyPage",
"email" : "jimmypage@gmail.com",
"password" : "$2b$10$mu0IcHADj5YVIT/66EEfPOxL3cvEjqDsnJUcrST8ZcatTOcQ42kn6",
"createdAt" : ISODate("2020-03-09T13:49:35.834Z"),
"updatedAt" : ISODate("2020-03-09T13:49:35.834Z"), "__v" : 0
}
{
"_id" : ObjectId("5e66499fcaf5d6697ca3fdbe"),
"posts" : [ ],
"username" : "AxlRose",
"email" : "axlrose@gmail.com",
"password" : "$2b$10$H3X3efz02RonlvNXaRPr2eEbflSiFK1ITFdbyT2igUGDK9gDpIJqO",
"createdAt" : ISODate("2020-03-09T13:50:23.702Z"),
"updatedAt" : ISODate("2020-03-09T13:50:23.702Z"),
"__v" : 0
}
帖子文件:
{
"_id" : ObjectId("5e66498ccaf5d6697ca3fdbd"),
"title" : "Jimmy Page's post",
"description" : "This is Jimmy Page's post",
"user" : ObjectId("5e66496fcaf5d6697ca3fdbc"),
"createdAt" : ISODate("2020-03-09T13:50:04.840Z"),
"updatedAt" : ISODate("2020-03-09T13:50:04.840Z"),
"__v" : 0
}
{
"_id" : ObjectId("5e6649b5caf5d6697ca3fdbf"),
"title" : "Axl Rose's Post",
"description" : "This is Axl Rose's Post",
"user" : ObjectId("5e66499fcaf5d6697ca3fdbe"),
"createdAt" : ISODate("2020-03-09T13:50:45.751Z"),
"updatedAt" : ISODate("2020-03-09T13:50:45.751Z"),
"__v" : 0 }
{
"_id" : ObjectId("5e664b7bf120ab6c0d9999c9"),
"title" : "Jimmy Page's second post",
"description" : "This is Jimmy Page's second post\n\n",
"user" : ObjectId("5e66496fcaf5d6697ca3fdbc"),
"createdAt" : ISODate("2020-03-09T13:58:19.261Z"),
"updatedAt" : ISODate("2020-03-09T13:58:19.261Z"),
"__v" : 0
}
推荐答案
您可以使用以下方法获取用户信息及其帖子.
You can use the following method to get the user info and his/her posts.
getUserPosts: async (req, res) => {
try {
const user = await User.findById(req.params.id).populate("posts");
if (!user) {
return res.status(400).json({ error: "No user" });
}
return res.status(200).json({ user });
} catch (err) {
return res.status(500).json({ error: "Server error" });
}
};
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