Node JS : how to fix validation failed cast to Array in mongoose - node.js

Question

i'm trying to make an API like this
I tried to add a controller to the array, but I got a problem when I executed an error.
error like this
I have been looking for a solution from google and stackoverflow for last post but I got confused with that.
I am very grateful for the help
this is my code from controller
getCommunity: async (req, res, next) => {
const { playerId } = req.params;
const newCommunity = new Community(req.body);
//Get Player
const player = Player.findById(playerId);
// Assign player as a part of community's player
newCommunity.communityPlayer = player;
// Save the community
await newCommunity.save();
// Add community to the player's array
player.PlayerCommunities.push(newCommunity);
// Save the playerCommunities
await player.save();
res.status(201).json(newCommunity)
}
this from my model player
const playerSchema = new Schema({
playerName: String,
playerImage: { type: String, data: Buffer },
playerNumberPhone: {
type: String,
validate: {
validator: function(v) {
return /\d{3}-\d{4}-\d{4}/.test(v);
},
message: props => `${props.value} is not a valid phone number!`
},
required: [true, 'User phone number required']
},
playerAddress: String,
PlayerCommunities: [{type: Schema.Types.ObjectId, ref: 'community'}]
});
this is my model community
const communitySchema = new Schema({
communityName: String,
communityImage: {type: String, data: Buffer},
communityPlayer: [{
type: Schema.Types.ObjectId,
ref: 'player'}]
}, { usePushEach: true });
and this for my end point actually i using it
http://localhost:3000/player/:playerId/community

Answer 1

the way you assign newCommunity play to the array is wrong that's why it screams the error. try like this
getCommunity: async (req, res, next) => {
const { playerId } = req.params;
const newCommunity = new Community(req.body);
//Get Player
const player = Player.findById(playerId);
// Assign player as a part of community's player
newCommunity.communityPlayer.push(player); // here change your code like this
// Save the community
await newCommunity.save();
// Add community to the player's array
player.PlayerCommunities.push(newCommunity);
// Save the playerCommunities
await player.save();
res.status(201).json(newCommunity)
}

Answer 2

In the community model communityPlayer property is an array.
But in the controller you are assigning a non-array value.
Change following line of your controller
newCommunity.communityPlayer = player;
To
newCommunity.communityPlayer.push(player);