feat: shorter setsCard

src/database/mongo/sorted.js

@@ -159,32 +159,7 @@ module.exports = function (db, module) {
 		if (!Array.isArray(keys) || !keys.length) {
 			return callback(null, []);
 		}
-		var pipeline = [
+		async.map(keys, module.sortedSetCard, callback);
-			{ $match: { _key: { $in: keys } } },
-			{ $group: { _id: { _key: '$_key' }, count: { $sum: 1 } } },
-			{ $project: { _id: 1, count: '$count' } },
-		];
-		db.collection('objects').aggregate(pipeline).toArray(function (err, results) {
-			if (err) {
-				return callback(err);
-			}
-
-			if (!Array.isArray(results)) {
-				results = [];
-			}
-
-			var map = {};
-			results.forEach(function (item) {
-				if (item && item._id._key) {
-					map[item._id._key] = item.count;
-				}
-			});
-
-			results = keys.map(function (key) {
-				return map[key] || 0;
-			});
-			callback(null, results);
-		});
 	};
 
 	module.sortedSetRank = function (key, value, callback) {

src/database/mongo/sorted/union.js

@@ -6,16 +6,12 @@ module.exports = function (db, module) {
 			return callback(null, 0);
 		}
 
-		var pipeline = [
+		db.collection('objects').aggregate([
 			{ $match: { _key: { $in: keys } } },
 			{ $group: { _id: { value: '$value' } } },
 			{ $group: { _id: null, count: { $sum: 1 } } },
-		];
+			{ $project: { _id: 0, count: '$count' } },
-
+		]).toArray(function (err, data) {
-		var project = { _id: 0, count: '$count' };
-		pipeline.push({	$project: project });
-
-		db.collection('objects').aggregate(pipeline).toArray(function (err, data) {
 			callback(err, Array.isArray(data) && data.length ? data[0].count : 0);
 		});
 	};