June 2014
Intermediate to advanced
696 pages
38h 52m
English
Content preview from Node.js, MongoDB, and AngularJS Web Development
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Understanding Query Objects
Throughout this chapter, the various methods all use a query object of some sort or another to define which documents to retrieve from a MongoDB collection. The query object is a standard JavaScript object with special property names that the MongoDB Node.js driver understands. These property names closely match the native queries that you can perform inside the MongoDB client, so you can easily transfer back and forth.
The properties of the query object are called operators because they operate on the data to determine whether a document should be included in the result set. These operators match the values of fields in a document against specific criteria. For example, to find all documents with a count value greater ...
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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.
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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.