Dynamic menu mongoose

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MongoDB

Node.js

I am trying to build a dynamic menu in nodejs with mongoose, but my method is not working. i get a list of menu items with an empty coreMongooseArray as its children property [{model.children = coreMongooseArray(0)}, {model.children = coreMongooseArray(0)}]



, but i should be getting a list of menu items each with their own list of children menu items. [{model.children = [model]}, {model.children = [model, model], {model.children = null}]

below is my method, route and form schema data. someone help!

Route

router.get('/scripts/menu', async function(req, res, next) {
    console.log('menutree is working');
    var initial = await Menu.find().populate('parent');
    var menutree = await Menu.GetMenuTree(initial, null, '5dfe0009551b160edcdc89ce');
    await res.status(200).send(menutree)
})

Schema

const menuSchema = new Mongoose.Schema({
    title: {
        type: String,
        trim: true,
        required: true
    },
    parent: {
        type: Mongoose.Schema.Types.ObjectId,
        ref: 'Menu'
    },
    active: {
        type: Boolean,
    },
    page: {
        type: String,
        trim: true
    },
    category: {
        type: Mongoose.Schema.Types.ObjectId,
        ref: 'Category',
        required: true
    },
    children: [Mongoose.Schema.Types.Mixed]

}, {
    timestamps: true
})

Method

menuSchema.static('GetMenuTree', async function(unfilteredlist, parent = undefined, category) {

    var MenuObj = this;

    var filteredlist = unfilteredlist.filter(function(item) {
        return item.parent == parent && item.category == category;
    })


    filteredlist = filteredlist.map(async function(item) {

        item.children = await MenuObj.GetMenuTree(unfilteredlist, item._id, item.category);
        return item

    })

    return Promise.all(filteredlist).then(function(results) {
        return results
    })

});

What I have tried:

i have tried to alter my method to get it to work, but i dont know whats wrong, im now trying to find someone who can offer some guidance online