Worn Off Keys | MongoDB in NodeJS - Array Query Operators: ElemMatch, All, and Size (2020) [Episode #17] @WornOffKeys | Uploaded 4 years ago | Updated 9 hours ago
Sometimes you need to search through arrays, in this video I show you 3 ways of how to do that. First we look at the $all operator, which will let you find documents that contain all specified elements of a given array. Next we look at the size operator, which allows you to search by array size. Last we look at the elemMatch operator, which lets you find values conditionally (greater than, less than, etc) from within the array.

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🖥️ Source code:
github.com/AlexzanderFlores/Worn-Off-Keys-MongoDB-NodeJS

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🕐 Timestamps:
00:00 Introduction
00:33 Adding an array to our schema and document
01:47 Using the "$all" operator
03:44 Using the "$size" operator
04:38 Using the "$elemMatch" operator
05:51 Outro

#mongodb #javascript #nodejs #wornoffkeys

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