Why this update query only update one record once

Question

$coll->update(
  array(
    \"uid\"=(int)$uid,
    \"status\"=>1,
    \"time\"=>array(\'$gt\'=>0,\'$lte\'=>$time)
  ),
  array(
    \'$set\'=>array         


        

Answer 1

This is the MongoDB default behaviour for updates. If you want to update multiple documents at once, you'll explicitly have to provide the multi flag:

db.collection.update( criteria, objNew, upsert, multi )

so you'd have to use

db.we.update({"uid":1, "status":1, "time" : {"$lte":1324403899}},
             {"$set":{status:0}}, 
             false, 
             true);

instead.

From the documentation:

If you are coming from SQL, be aware that by default, update() only modifies the first matched object. If you want to modify all matched objects, you need to use the multi flag.