fix: redis hget

'node_redis: The HGET command contains a invalid argument type.\n' +
'Only strings, dates and buffers are accepted. Please update your code to use valid argument types.'

src/database/redis/hash.js

@@ -75,7 +75,7 @@ module.exports = function (module) {
 		if (cachedData[key]) {
 			return cachedData[key].hasOwnProperty(field) ? cachedData[key][field] : null;
 		}
-		return await module.client.async.hget(key, field);
+		return await module.client.async.hget(key, String(field));
 	};
 
 	module.getObjectFields = async function (key, fields) {

test/database/hash.js

@@ -211,6 +211,11 @@ describe('Hash methods', function () {
 				done();
 			});
 		});
+
+		it('should return null and not error', async () => {
+			const data = await db.getObjectField('hashTestObject', ['field1', 'field2']);
+			assert.strictEqual(data, null);
+		});
 	});
 
 	describe('getObjectFields()', function () {