javascript

MongoDB duplicate key error on _id

MongoDB.*E11000.*duplicate key error.*index:.*_id_

Fixes

1.Let MongoDB auto-generate _id instead of specifying manually
2.Use updateOne with upsert:true for insert-or-update patterns
3.Check for race conditions causing duplicate _id generation

mongodbduplicate-key

Related Errors

javascript3 fixes

Cannot read property of undefined

Cannot read propert(y|ies) of undefined

•Add optional chaining (?.)
•Check if object exists before accessing

javascript3 fixes

Cannot read property of null

Cannot read propert(y|ies) of null

•Add null check before access
•Use optional chaining (?.)

javascript3 fixes

TypeError: X is not a function

is not a function

•Check spelling of method name
•Verify import is correct