I am trying to display users that are in a friend group. I am using mongoose and express. This is the friend group schema:
var mongoose = require("mongoose");
var FriendGroupSchema = new mongoose.Schema({
name: String,
public_or_private: { type: String, enum: ["public", "private",] },
friends: [
{
user: {
type: mongoose.Schema.Types.ObjectId,
ref: "friend"
},
admin: Boolean
}
]
});
module.exports = mongoose.model("friend_group", FriendGroupSchema);
and this is the user schema:
var mongoose = require("mongoose");
var passportLocalMongoose = require("passport-local-mongoose");
var UserSchema = new mongoose.Schema({
username: String,
password: String,
profile_picture: String,
about: String,
friend_groups: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "friend_group"
}
],
friends: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "friend"
}
],
});
UserSchema.plugin(passportLocalMongoose);
module.exports = mongoose.model("User", UserSchema);
I will need to display the users inside the friend group in a show page of a user. I will need to .populate into the user, then populate into the friend group, and then into the friends array and finally the user and whether he/she is an admin(I will need to display both).
this is what I have so far:
.populate({path:"friend_groups", populate: {path: 'friends', populate: {path: 'user', model: 'User'}}})
but this doesn't seem to work. what am I doing wrong?
Related
I have 2 schemas:
const mongoose = require('mongoose');
const PinSchema = new mongoose.Schema({
title: String,
content: String,
image: String,
latitude: Number,
longitude: Number,
author: {
type: mongoose.Schema.ObjectId,
ref: "User"
},
comments: [
{
text: String,
createdAt: {
type: Date,
default: Date.now,
author: {
type: mongoose.Schema.ObjectId,
ref: "User"
}
}
}
]
}, { timestamps: true });
module.exports = mongoose.model("Pin", PinSchema);
and
const mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
name: String,
email: String,
picture: String
});
module.exports = mongoose.model("User", UserSchema);
As you can see author field in Pin is the same as the _id in User schema.
I then try to populate the comments author field in the Pin schema like this:
const pinUpdated = await Pin.findOneAndUpdate(
{ _id: pinId },
{ $push: { comments: "some comment" } },
{ new: true }
).populate("author")
.populate("comments.author");
however the result object has author field set to null so population doesn't work.
I'm not against doing this with native mongo syntax using $lookup but in my case it's not just looking up an array it's looking up a field of an objects array:
db.pins.aggregate([
{
$lookup:
{
from: "users",
localField: "comments._id", // this won't work
foreignField: "_id",
as: "authorOutput"
}
}
])
what am I missing in populate()?
It looks like your author field in the comments array is nested inside the createdAt object, which is likely unintentional. Changing PinSchema to the following (closing curly brace before author) should fix it:
const PinSchema = new mongoose.Schema({
...
comments: [
{
text: String,
createdAt: {
type: Date,
default: Date.now,
},
author: {
type: mongoose.Schema.ObjectId,
ref: "User"
}
}
]
}, { timestamps: true });
These the response for user that Im getting from get request to profile API
"user": "5cc3a4e8d37a7259b45c97fe"
What I'm looking for instead is
"user":{
"_id": "5cc3a4e8d37a7259b45c97fe",
"name":"Jhon Doe",
}
Here is my code:
Profile.findOne({
user: req.user.id
})
.populate('user',['name']) // I added this line to populate user object with name
.then(profile=>{
if(!profile){
errors.noprofile = 'There is no profile for this user'
return res.status(404).json(errors);
}
res.json(profile)
})
.catch(err => res.status(404).json(err));
However, Im getting these error:
{
"message": "Schema hasn't been registered for model \"users\".\nUse mongoose.model(name, schema)",
"name": "MissingSchemaError"
}
What am I missing
Profile Schema
const ProfileSchema = new Schema({
user:{
type: Schema.Types.ObjectId,
ref: 'users'
},
handle: {
type: String,
required: true,
max: 40
},
company: {
type: String
},
website: {
type: String,
}
})
Here is how my Users schema looks like
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
// Create Schema
const UserSchema = new Schema({
name:{
type: String,
required: true,
},
email:{
type: String,
required: true,
},
password:{
type: String,
required: true,
},
avator:{
type: String,
},
date:{
type: Date,
default: Date.now,
}
});
module.exports = User = mongoose.model('Users', UserSchema)
Schema that you are referencing in Profile schema is users, but you have saved your user schema as Users. So I would say that you need to update your Profile schema:
const ProfileSchema = new Schema({
user:{
type: Schema.Types.ObjectId,
ref: 'Users'
},
handle: {
type: String,
required: true,
max: 40
},
company: {
type: String
},
website: {
type: String,
}
})
Name under which is saved your User schema can be found in this line
module.exports = User = mongoose.model('Users', UserSchema)
The error says you don't have Schema for Users. You reference it from Profile Schema, but you don't have it. It can be this way:
const Users = new Schema({
name: String
})
I have a ProfileSchema that I want to keep track of posts that have been posted. When I save a new Post it has a Profile_id but when I fetch the profile entry the posts array is empty. How does this work?
Profile Schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const ProfileSchema = new mongoose.Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'users'
},
handle: {
type: String,
required: true,
max: 40
},
posts: [
{
type: Schema.Types.ObjectId,
ref: 'posts'
}
],date:{
type: Date,
default: Date.now
}
})
module.exports = Profile = mongoose.model('profile', ProfileSchema);
Post Schema
const PostSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'users'
},
profile: {
type: Schema.Types.ObjectId,
ref: 'profile'
},
title: {
type: String,
required: true,
max: 40
},
body: {
type: String,
required: true
},
date: {
type: Date,
default: Date.now
}
})
module.exports = Profile = mongoose.model('posts', PostSchema)
how I save it
router.post('/', passport.authenticate('jwt', {session: false}), (req,res) => {
const newPost = new Post({
title: req.body.title,
body: req.body.body,
img: req.body.img,
user: req.user._id,
profile: req.body.profile_id
});
newPost.save().then(post => res.json(post));
})
I'm a bit confused the mongoose documentation uses syntax I'm not familiar with or haven't learned their way yet. my user populates when I fetch for the profile data but the posts array is blank when I populate it.
My userSchema looks something like this:
var UserSchema = new Schema({
name: { type: ......},
email: { type..... },
test1: {
[
[0] { test: Array },
[1] { test: Array }
]
}
)};
With a few other objects not included here. In the object that's in test1 there is stored some data to which i want to add or somehow bind an array of comments. The problem is that I'm not sure which is the best way to implement this? If i should create a new commentSchema and somehow connect the comments with the object or how to do it. Can anyone give me some tips on how to implement it?
You can create your schema as follows:
var CommentSchema = new Schema({
user: {type: Schema.Types.ObjectId, ref: 'User', required: true},
message: String,
});
var UserSchema = new Schema({
name: { type: ......},
email: { type..... },
...
test1: {
comments: [CommentSchema]
}
... OR
comments: [CommentSchema]
)};
or if you are trying to do something like posts with comments try
var PostSchema = new Schema({
comments: [CommentSchema]
postBody: String
})
var UserSchema = new Schema({
name: { type: ......},
email: { type..... },
...
posts: [PostSchema]
...
)};
I have defined a mongoose user schema:
var userSchema = mongoose.Schema({
email: { type: String, required: true, unique: true},
password: { type: String, required: true},
name: {
first: { type: String, required: true, trim: true},
last: { type: String, required: true, trim: true}
},
phone: Number,
lists: [listSchema],
friends: [mongoose.Types.ObjectId],
accessToken: { type: String } // Used for Remember Me
});
var listSchema = new mongoose.Schema({
name: String,
description: String,
contents: [contentSchema],
created: {type: Date, default:Date.now}
});
var contentSchema = new mongoose.Schema({
name: String,
quantity: String,
complete: Boolean
});
exports.User = mongoose.model('User', userSchema);
the friends parameter is defined as an array of Object IDs.
So in other words, a user will have an array containing the IDs of other users. I am not sure if this is the proper notation for doing this.
I am trying to push a new Friend to the friend array of the current user:
user = req.user;
console.log("adding friend to db");
models.User.findOne({'email': req.params.email}, '_id', function(err, newFriend){
models.User.findOne({'_id': user._id}, function(err, user){
if (err) { return next(err); }
user.friends.push(newFriend);
});
});
however this gives me the following error:
TypeError: Object 531975a04179b4200064daf0 has no method 'cast'
If you want to use Mongoose populate feature, you should do:
var userSchema = mongoose.Schema({
email: { type: String, required: true, unique: true},
password: { type: String, required: true},
name: {
first: { type: String, required: true, trim: true},
last: { type: String, required: true, trim: true}
},
phone: Number,
lists: [listSchema],
friends: [{ type : ObjectId, ref: 'User' }],
accessToken: { type: String } // Used for Remember Me
});
exports.User = mongoose.model('User', userSchema);
This way you can do this query:
var User = schemas.User;
User
.find()
.populate('friends')
.exec(...)
You'll see that each User will have an array of Users (this user's friends).
And the correct way to insert is like Gabor said:
user.friends.push(newFriend._id);
I'm new to Mongoose myself, so I'm not entirely sure this is right. However, you appear to have written:
friends: [mongoose.Types.ObjectId],
I believe the property you're looking for is actually found here:
friends: [mongoose.Schema.Types.ObjectId],
It may be that the docs have changed since you posted this question though. Apologies if that's the case. Please see the Mongoose SchemaTypes docs for more info and examples.
I would try this.
user.friends.push(newFriend._id);
or
friends: [userSchema],
but i'm not sure if this is correct.