Reputation: 333
My chat object has got an array with two elements - users id. I have first id from url params, but second id I have in array of users. Now I want to get all chats where first id is this one from url, and second is in the array. I think that example how I tried to do it will be the best explanation of this problem :
Chat.find({
users: { $all: [req.params.id, { $in: usersIdArray }] }
})
where usersIdArray is for example:
[ 5f8777a01d8c122e74cb6f08, 5f8777721d8c122e74cb6f02 ]
they are numbers, not strings. I don't know if it is important...
The error I get now :
(node:12168) UnhandledPromiseRejectionWarning: CastError: Cast to ObjectId failed for value "{ '$in': [ 5f8777a01d8c122e74cb6f08, 5f8777721d8c122e74cb6f02 ] }" at path "users" for model "Chat"
And my chat schema:
// Create schema
const ChatSchema = new Schema({
users: {
type: [{
type: Schema.Types.ObjectId,
ref: 'Users',
}, {
type: Schema.Types.ObjectId,
ref: 'Users',
}],
required: [true, 'Podaj uczestników czatu.'],
},
lastMessage: {
type: Schema.Types.ObjectId,
ref: 'Message'
}
}, { timestamps: opts });
Upvotes: 2
Views: 314
Reputation: 333
@Christian Fritz, I had to add $or to your solution and everything is fine now:
Chat.find({
$or: [
{
"users.1": req.params.id,
"users.0": { $in: usersIdArray }
}, {
"users.0": req.params.id,
"users.1": { $in: usersIdArray }
}]
})
Upvotes: 0
Reputation: 21384
Since the length of your array is fixed (2), you can just query based on array position:
Chat.find({
"users.0": req.params.id,
"users.1": {$in: usersIdArray}
});
If that doesn't work then probably because usersIdArray
are actually not ObjectIds, in which case you'd need to map them:
usersIdArray.map(x => ObjectId(x))
Upvotes: 2