mongodb - Mongo return first set of results found from 3 finds() -

is there way me search list of options until 1 of them comes results? or there better way in general find records following 3 queries:

{     "geotargets.countries.name": {$in: ["us"]},     "geotargets.countries.regions.name": {$in: ["ny", "nj"]},     "geotargets.countries.regions.cities.name": {$in: ["city 1", "city 2", "city 3"]} }, {     "geotargets.countries.name": {$in: ["us"]},     "geotargets.countries.regions.name": {$in: ["ny", "nj"]} }, {     "geotargets.countries.name": {$in: ["us"]} } 

i trying search , want this:

1. first try find results match 1 of cities
2. if nothing found try find results match 1 of regions
3. again if nothing found try find results match on coutries

in application doing if search:

take slimmed down version of node (not real, purpose of visualization), way searching. doesn't seem best be. seems slow. there way in mongodb 1 query?

var results = db.campaigns.find({     "geotargets.countries.name": {$in: ["us"]},     "geotargets.countries.regions.name": {$in: ["ny", "nj"]},     "geotargets.countries.regions.cities.name": {$in: ["city 1", "city 2", "city 3"]}});  if(results.length == 0){     results = db.campaigns.find({         "geotargets.countries.name": {$in: ["us"]},         "geotargets.countries.regions.name": {$in: ["ny", "nj"]}});      if(results.length == 0){         results = db.campaigns.find({"geotargets.countries.name": {$in: ["us"]}});     } }  console.log(results); 

you make use of $or operator club these conditions , execute them.

the boolean $or operator of aggregation framework short circuit evaluation, i.e, if preceding condition satisfied, rest of conditions not executed against document.

var conda = {     "geotargets.countries.name": {$in: ["us"]},     "geotargets.countries.regions.name": {$in: ["ny", "nj"]},     "geotargets.countries.regions.cities.name": {$in: ["city 1", "city 2", "city 3"]} }; var condb = {     "geotargets.countries.name": {$in: ["us"]},     "geotargets.countries.regions.name": {$in: ["ny", "nj"]} }; var condc = {     "geotargets.countries.name": {$in: ["us"]} }; 

and execute as:

db.campaigns.aggregate(  [   {$match:{$or:[conda,condb,condc]}}  ],function(err,data){       //callback   }) 

$or uses short-circuit logic: operation stops evaluation after encountering first true expression.

although behavior of $or operator not documented when used query operator in find() query, try , see 1 more efficient data set.