create sub document mongoose code example

Example 1: mongoose increment sub document

BlogPost.update({_id: blogPostId, 'comments._id': commentId}, {$inc:{'comments.$.rating':1}})
    .then((blogPost) => res.status(200).json({
    'status': 'Comment rating is increased.'
}))

Example 2: create document mongoose

var Tank = mongoose.model('Tank', yourSchema);

var small = new Tank({ size: 'small' });
small.save(function (err) {
  if (err) return handleError(err);
  // saved!
});

// or

Tank.create({ size: 'small' }, function (err, small) {
  if (err) return handleError(err);
  // saved!
});

// or, for inserting large batches of documents
Tank.insertMany([{ size: 'small' }], function(err) {

});