feat: use covered query

src/database/mongo/main.js

@@ -15,16 +15,23 @@ module.exports = function (module) {
 		if (!key) {
 			return;
 		}
+
 		if (Array.isArray(key)) {
-			const data = await module.client.collection('objects').find({ _key: { $in: key } }).toArray();
-			var map = {};
+			const data = await module.client.collection('objects').find({
+				_key: { $in: key },
+			}, { _id: 0, _key: 1 }).toArray();
+
+			const map = {};
 			data.forEach(function (item) {
 				map[item._key] = true;
 			});
 
 			return key.map(key => !!map[key]);
 		}
-		const item = await module.client.collection('objects').findOne({ _key: key });
+
+		const item = await module.client.collection('objects').findOne({
+			_key: key,
+		}, { _id: 0, _key: 1 });
 		return item !== undefined && item !== null;
 	};
 
@@ -74,15 +81,16 @@ module.exports = function (module) {
 		if (!key) {
 			return;
 		}
-		var data = { data: value };
-		await module.setObject(key, data);
+		await module.setObject(key, { data: value });
 	};
 
 	module.increment = async function (key) {
 		if (!key) {
 			return;
 		}
-		const result = await module.client.collection('objects').findOneAndUpdate({ _key: key }, { $inc: { data: 1 } }, { returnOriginal: false, upsert: true });
+		const result = await module.client.collection('objects').findOneAndUpdate({
+			_key: key,
+		}, { $inc: { data: 1 } }, { returnOriginal: false, upsert: true });
 		return result && result.value ? result.value.data : null;
 	};
 

src/database/mongo/sorted.js

@@ -428,7 +428,7 @@ module.exports = function (module) {
 		count = count !== undefined ? count : 0;
 		buildLexQuery(query, min, max);
 
-		const data = await module.client.collection('objects').find(query, { projection: { _id: 0, _key: 0, score: 0 } })
+		const data = await module.client.collection('objects').find(query, { projection: { _id: 0, value: 1 } })
 			.sort({ value: sort })
 			.skip(start)
 			.limit(count === -1 ? 0 : count)