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This commit is contained in:
Eliot Horowitz 2010-11-16 11:15:47 -05:00
parent 87be2c5e2a
commit 7f0b3ac99c
1 changed files with 6 additions and 4 deletions
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10
db/projection.h
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@ -23,7 +23,9 @@
namespace mongo {
/**
used for doing field limiting
* given a document and a projection specification
* can transform the document
* currently supports specifying which fields and $slice
*/
class Projection {
public:
@ -63,6 +65,7 @@ namespace mongo {
/**
* called once per lifetime
* e.g. { "x" : 1 , "a.y" : 1 }
*/
void init( const BSONObj& spec );
@ -84,9 +87,8 @@ namespace mongo {
/**
* @return if the key has all the information needed to return
* return a new KeyOnly
* otherwise null
* @return if the keyPattern has all the information needed to return then
* return a new KeyOnly otherwise null
* NOTE: a key may have modified the actual data
* which has to be handled above this (arrays, geo)
*/