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t = db.group5;
t.drop();
// each group has groupnum+1 5 users
for ( var group=0; group<10; group++ ){
for ( var i=0; i<5+group; i++ ){
t.save( { group : "group" + group , user : i } );
}
}
function c( group ){
return t.group(
{
key : { group : 1 } ,
q : { group : "group" + group } ,
initial : { users : {} },
reduce : function(obj,prev){
prev.users[obj.user] = true; // add this user to the hash
},
finalize : function(x){
var count = 0;
for (var key in x.users){
count++;
}
//replace user obj with count
//count add new field and keep users
x.users = count;
return x;
}
})[0]; // returns array
}
assert.eq( "group0" , c(0).group , "g0" );
assert.eq( 5 , c(0).users , "g0 a" );
assert.eq( "group5" , c(5).group , "g5" );
assert.eq( 10 , c(5).users , "g5 a" );
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