update syntax

[mongobee]

db.users.update({b:'q'}, {$set:{a:1}}, false, true)

 

Above query updates value of field "a'" as 1 where field "b" is "q". What is the purpose of passing the last 2 parameters (,false, true)?

[Jorge Puente Sarrín]

Hi,

These are optional parameters

Third parameter: upsert parameter, inserts merged document when not exists

Fourth parameter: multi parameter, updates on MongoDB defaults affects to first document, with true, update all of matched documents on collections

http://www.mongodb.org/display/DOCS/Updating#Updating-update%28%29

2012/9/12 mongobee <jja...@gmail.com>

db.users.update({b:'q'}, {$set:{a:1}}, false, true)

 

Above query updates value of field "a'" as 1 where field "b" is "q". What is the purpose of passing the last 2 parameters (,false, true)?

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Atte.
Jorge Puente Sarrín.

[mongobee]

Thanks Jorge. I read the basic tutorial but did not know there is detailed documentation in the DOCS for every function. Thanks again for pointing to this link.