MongoDB：存储模型数组

Question

I have declared following models:

Banana

var banana = new mongoose.Schema({
    src: {
        type: String,
        max: 1000,
        default: "yabadaba"
});

User

var user = new mongoose.Schema({
    name: String,
    bananas: [banana]
});

And I have problems inserting data to user collection. Here's the code:

var data = [{
    name: "Batman",
    bananas: [
        new banana({src: "nananana"}),
        new banana({src: "nana"})
    ]
}, {
    name: "Robin",
    bananas: [
        new banana({src: "meh"})
    ]
}];

for(var i=0, arrLen=data.length; i<arrLen; i++){
    var item = new User(data[i]);
    item.save();
}

And I it throws an error...

CastError: Cast to Array failed for value "..." at user.bananas. name: CastError, kind: 'Array', value: [Object], path: user.bananas, reason: [Object]

Answer 1

As I did not need to store bananas to db, I created a workaround for this. If it was necessary to store bananas separately, then it is possible to reference them via object id.

So I removed Bananas model and modified User model as follows.

User

var user = new mongoose.Schema({
    name: String,
    bananas: [{
        src: {
            type: String,
            max: 1000,
            default: "yabadaba"
        }
    }]
});

I inserted values as follows:

var data = [{
    name: "Batman",
    bananas: [
        {src: "nananana"},
        {src: "nana")
    ]
}, {
    name: "Robin",
    bananas: [
        {src: "meh"}
    ]
}];

for(var i=0, arrLen=data.length; i<arrLen; i++){
    var item = new User(data[i]);
    item.save();
}

And it seems to be working.