June 2014
Intermediate to advanced
696 pages
38h 52m
English
Content preview from Node.js, MongoDB, and AngularJS Web DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Limiting Fields Returned in Objects
Another extremely effective method of limiting the resulting data when retrieving documents is to limit which fields are returned. Documents may have a lot of different fields that are useful in some circumstance but not in others. You should consider which fields should be included when retrieving documents from the MongoDB server and only request the ones that are necessary.
To limit the fields returned from a server, use the fields option of the options object. The fields option in an object allows you to either include or exclude fields by setting the value of the document field to 0 for exclude or 1 for include. You cannot mix inclusions and exclusions in the same expression.
For example, to exclude the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.