Mongodb unwind nested documents

Question

I have a document in MongoDB and I\'m trying to unwind it in PHP. I want to unwind a document that has a subdocument that contains yet anothersubdocument. I was able to do t

Answer 1

I know that what you're trying to do is possible with MongoDB. The aggregate() command can take as many arguments as you need.

In the mongo shell, a command like this

db.collection.aggregate(
  { $project: {
    _id: 1,
    items: 1
  } },
  { $unwind: '$items' },
  { $unwind: '$items.images' }
);

will unwind the items subdocument, then the images subdocument.

Based on the code in your question, perhaps this will work

$project = array(
  '$project' => array(
    '_id' => 1,
    'items' => 1,
  )
);

$unwind_items = array(
  '$unwind' => '$items'
);

$unwind_images = array(
  '$unwind' => '$items.images'
);


$query = $mongo->store->aggregate($project,$unwind_items,$unwind_images);