CODEWITHSUNDEEP
mongodb
Peter
Peter

Reputation: 1253

MongoDB updateMany is not a function

I'm using mongodb 3.6.3

db.version() 3.6.3

I have test collection:

> db.test.find()
{ "_id" : ObjectId("5c582787e504df9ad201ba77"), "val" : 0.25 }
{ "_id" : ObjectId("5c582789e504df9ad201ba78"), "val" : 1 }
{ "_id" : ObjectId("5c58278be504df9ad201ba79"), "val" : 10 }
{ "_id" : ObjectId("5c58278fe504df9ad201ba7a"), "val" : 11122 }

And I want to divide all values. Due for this I've tried to use updateMany

> db.test.updateMany({}, {$mul: {val: 0.5}})
2019-02-04T17:08:27.548+0500 TypeError: Property 'updateMany' of object local.test is not a function
> db.test.update({}, {$mul: {val: 0.5}}, {multi:true})
WriteResult({ "nMatched" : 4, "nUpserted" : 0, "nModified" : 4 })
> db.test.find()
{ "_id" : ObjectId("5c582787e504df9ad201ba77"), "val" : 0.125 }
{ "_id" : ObjectId("5c582789e504df9ad201ba78"), "val" : 0.5 }
{ "_id" : ObjectId("5c58278be504df9ad201ba79"), "val" : 5 }
{ "_id" : ObjectId("5c58278fe504df9ad201ba7a"), "val" : 5561 }

Why there is no updateMany function?

Upvotes: 2

Views: 1463

Answers (1)

Ashish
Ashish

Reputation: 643

updateMany has been introduced in version 3.2 since you're using mongo shell with version 2.6.10, it's missing there. You need to update your CLI and it should work as expected.

Upvotes: 2

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