CODEWITHSUNDEEP
mongodbsortingmeteor
Garfield
Garfield

Reputation: 2537

Custom sort of nested document

I have a collection fruits {name:'orange', id:1}.... and another one users, users have document favorites: [1,2,3]. I want to display the favourite fruits at first and then the rest.

I can query twice like first with fruits.find({id: {$id:[user.favorites]}}) and then with not in and then merge them.

Is there any other way to do it? Is there a possibility to pass custom function to sort, if so. How can I do that?

Upvotes: 0

Views: 44

Answers (2)

Oliver
Oliver

Reputation: 4091

No, Meteor doesn't allow a custom sort function. What you can do, is use the sortBy() and contains() functions from the underscore library to sort your items:

var fruitsSorted = _.sortBy(fruits.find(selector).fetch(), (fruit) => {
    if(_.contains(user.favorites, fruit.id)){
        return 0;
    }
    return 1;
});

You now have a sorted array in fruitsSorted.

Upvotes: 1

Kunal Kapadia
Kunal Kapadia

Reputation: 3333

Lets say you have queried fruits collection for all fruits.

var fruits = [
    { name: 'orange', id: 1},
    { name: 'apple', id: 2},
    { name: 'banana', id: 3}
];

Now you can use sortBy and includes function from lodash library to sort the fruits as per user favourites.

var sortedFruits = _.sortBy(fruits, function(fruit) {
    return _.includes(user.favourites, fruit.id) ? 0 : 1;
});

Upvotes: 1

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