Lodash: how do I use filter when I have nested Object?

Question

Consider this example. I am using Lodash

 \'data\': [
        {
            \'category\': {
                \'uri\': \'/categories/0b092e7c-4d2c-4eba-8c4e-80         


        

Answer 1

beginning from v3.7.0 you can do it in this way:

_.filter(summary.data, 'category.parent', 'Food')

Answer 2

_.where(summary.data, {category: {parent: 'Food'}});

Should do the trick too

Answer 3

_.filter(summary.data, function(item){
  return item.category.parent === 'Food';
});

Answer 4

lodash allows nested object definitions:

_.filter(summary.data, {category: {parent: 'Food'}});

As of v3.7.0, lodash also allows specifying object keys in strings:

_.filter(summary.data, ['category.parent', 'Food']);

Example code in JSFiddle: https://jsfiddle.net/6qLze9ub/

lodash also supports nesting with arrays; if you want to filter on one of the array items (for example, if category is an array):

_.filter(summary.data, {category: [{parent: 'Food'}] }); 

If you really need some custom comparison, that's when to pass a function:

_.filter(summary.data, function(item) {
  return _.includes(otherArray, item.category.parent);
});

Answer 5

In lodash 4.x, you need to do:

_.filter(summary.data, ['category.parent', 'Food'])

(note the array wrapping around the second argument).

This is equivalent to calling:

_.filter(summary.data, _.matchesProperty('category.parent', 'Food'))

Here are the docs for _.matchesProperty:

// The `_.matchesProperty` iteratee shorthand.
_.filter(users, ['active', false]);
// => objects for ['fred']