CODEWITHSUNDEEP
mongodbcollectionsconcatenation
lolops
lolops

Reputation: 107

2 Collections - Concat

Extensive research couldn't answer this question but i feel it's not a big thing:

I aggregate product data and differ at the filter stage, my output (exact same keys) goes into 2 collections.

I work exclusively in mongoshell.

I have only found manuals to bring 2 collections together - with different keys, in this situation i'd use mapReduce to bring them together. what i want is more like classic concat - put all the objects from 2 collections into one.

Upvotes: 1

Views: 149

Answers (1)

lolops
lolops

Reputation: 107

Found a definite answer, exactly what i needed:

use this in mongoshell: db.source_collection.find().forEach(function(obj){ db.target_collection.insert(obj) });

easy, quick, excellent solution!

src: https://wrtsprt.wordpress.com/2011/08/17/merging-collections-in-mongodb/

Upvotes: 1

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