diff --git a/dist/db/clickhouse/index.cjs b/dist/db/clickhouse/index.cjs
index 9db90ef..7a15ee4 100644
--- a/dist/db/clickhouse/index.cjs
+++ b/dist/db/clickhouse/index.cjs
@@ -80,7 +80,7 @@ let Index;
  */
 
 function ClickhouseDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== ClickhouseDB){
         return new ClickhouseDB(name, config);
     }
     if(typeof name === "object"){
@@ -106,7 +106,7 @@ function ClickhouseDB(name, config = {}){
 }
 ClickhouseDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     defaults.resolution = Math.max(flexsearch.resolution, flexsearch.resolution_ctx);
diff --git a/dist/db/indexeddb/index.cjs b/dist/db/indexeddb/index.cjs
index 9797b72..f1f0e76 100644
--- a/dist/db/indexeddb/index.cjs
+++ b/dist/db/indexeddb/index.cjs
@@ -55,7 +55,7 @@ const Index = create_object();
  */
 
 function IdxDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== IdxDB){
         return new IdxDB(name, config);
     }
     if(typeof name === "object"){
@@ -75,7 +75,7 @@ function IdxDB(name, config = {}){
 }
 IdxDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/db/mongodb/index.cjs b/dist/db/mongodb/index.cjs
index 75d134c..c43acfc 100644
--- a/dist/db/mongodb/index.cjs
+++ b/dist/db/mongodb/index.cjs
@@ -45,7 +45,7 @@ let Index = Object.create(null);
  */
 
 function MongoDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== MongoDB){
         return new MongoDB(name, config);
     }
     if(typeof name === "object"){
@@ -70,7 +70,7 @@ function MongoDB(name, config = {}){
 
 MongoDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/db/postgres/index.cjs b/dist/db/postgres/index.cjs
index 86f217e..3250400 100644
--- a/dist/db/postgres/index.cjs
+++ b/dist/db/postgres/index.cjs
@@ -74,7 +74,7 @@ let DB;
  */
 
 function PostgresDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== PostgresDB){
         return new PostgresDB(name, config);
     }
     if(typeof name === "object"){
@@ -95,7 +95,7 @@ function PostgresDB(name, config = {}){
 }
 PostgresDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/db/redis/index.cjs b/dist/db/redis/index.cjs
index 6366f57..3aac402 100644
--- a/dist/db/redis/index.cjs
+++ b/dist/db/redis/index.cjs
@@ -43,7 +43,7 @@ let DB, TRX;
  */
 
 function RedisDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== RedisDB){
         return new RedisDB(name, config);
     }
     if(typeof name === "object"){
@@ -69,7 +69,7 @@ function RedisDB(name, config = {}){
 
 RedisDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
@@ -82,20 +82,24 @@ RedisDB.prototype.open = async function(){
     if(this.db){
         return this.db
     }
+    if(DB){
+        return this.db = DB;
+    }
     let url = defaults.url;
     if(!url){
         url = defaults.user
             ? `redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`
             : `redis://${defaults.host}:${defaults.port}`;
     }
-    return this.db =
+    return this.db = DB =
         await redis.createClient(url)
         .on("error", err => console.error(err))
         .connect();
 };
 
 RedisDB.prototype.close = async function(){
-    this.db = null;
+    DB && await this.db.disconnect(); // this.db.client.disconnect();
+    this.db = DB = null;
     return this;
 };
 
@@ -116,14 +120,16 @@ RedisDB.prototype.clear = function(){
 
 function create_result(range, type, resolve, enrich){
     if(resolve){
-        for(let i = 0, tmp, id; i < range.length; i++){
-            tmp = range[i];
-            id = type === "number"
-                ? parseInt(tmp.value || tmp, 10)
-                : tmp.value || tmp;
-            range[i] = /*enrich
-                ? { id, doc: tmp.doc }
-                :*/ id;
+        if(type === "number"){
+            for(let i = 0, tmp, id; i < range.length; i++){
+                tmp = range[i];
+                id = type === "number"
+                    ? parseInt(tmp.id || tmp, 10)
+                    : tmp.id || tmp;
+                range[i] = enrich
+                    ? { id, doc: tmp.doc }
+                    : id;
+            }
         }
         return range;
     }
@@ -132,15 +138,11 @@ function create_result(range, type, resolve, enrich){
         for(let i = 0, tmp, id, score; i < range.length; i++){
             tmp = range[i];
             id = type === "number"
-                ? parseInt(tmp.value, 10)
-                : tmp.value;
+                ? parseInt(tmp.id || tmp, 10)
+                : tmp.id || tmp;
             score = tmp.score;
             result[score] || (result[score] = []);
-            result[score].push(
-                enrich
-                    ? { id, doc: tmp.doc }
-                    : id
-            );
+            result[score].push(id);
         }
         return result;
     }
diff --git a/dist/db/sqlite/index.cjs b/dist/db/sqlite/index.cjs
index db48e08..e408ac3 100644
--- a/dist/db/sqlite/index.cjs
+++ b/dist/db/sqlite/index.cjs
@@ -68,7 +68,7 @@ const Index = Object.create(null);
  */
 
 function SqliteDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== SqliteDB){
         return new SqliteDB(name, config);
     }
     if(typeof name === "object"){
@@ -92,7 +92,7 @@ function SqliteDB(name, config = {}){
 }
 SqliteDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/db/redis/index.js b/dist/module-debug/db/redis/index.js
index 46ac29a..7987505 100644
--- a/dist/module-debug/db/redis/index.js
+++ b/dist/module-debug/db/redis/index.js
@@ -63,17 +63,19 @@ RedisDB.prototype.open = async function () {
     if (this.db) {
         return this.db;
     }
-
+    if (DB) {
+        return this.db = DB;
+    }
     let url = defaults.url;
     if (!url) {
         url = defaults.user ? `redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}` : `redis://${defaults.host}:${defaults.port}`;
     }
-    return this.db = await createClient(url).on("error", err => console.error(err)).connect();
+    return this.db = DB = await createClient(url).on("error", err => console.error(err)).connect();
 };
 
 RedisDB.prototype.close = async function () {
-    // this.db.client.disconnect();
-    this.db = null;
+    DB && (await this.db.disconnect()); // this.db.client.disconnect();
+    this.db = DB = null;
     return this;
 };
 
@@ -87,22 +89,22 @@ RedisDB.prototype.clear = function () {
 
 function create_result(range, type, resolve, enrich) {
     if (resolve) {
-        for (let i = 0, tmp, id; i < range.length; i++) {
-            tmp = range[i];
-            id = "number" === type ? parseInt(tmp.value || tmp, 10) : tmp.value || tmp;
-            range[i] = /*enrich
-                       ? { id, doc: tmp.doc }
-                       :*/id;
+        if ("number" === type) {
+            for (let i = 0, tmp, id; i < range.length; i++) {
+                tmp = range[i];
+                id = "number" === type ? parseInt(tmp.id || tmp, 10) : tmp.id || tmp;
+                range[i] = enrich ? { id, doc: tmp.doc } : id;
+            }
         }
         return range;
     } else {
         let result = [];
         for (let i = 0, tmp, id, score; i < range.length; i++) {
             tmp = range[i];
-            id = "number" === type ? parseInt(tmp.value, 10) : tmp.value;
+            id = "number" === type ? parseInt(tmp.id || tmp, 10) : tmp.id || tmp;
             score = tmp.score;
             result[score] || (result[score] = []);
-            result[score].push(enrich ? { id, doc: tmp.doc } : id);
+            result[score].push(id);
         }
         return result;
     }
diff --git a/dist/module/db/redis/index.js b/dist/module/db/redis/index.js
index 46ac29a..7987505 100644
--- a/dist/module/db/redis/index.js
+++ b/dist/module/db/redis/index.js
@@ -63,17 +63,19 @@ RedisDB.prototype.open = async function () {
     if (this.db) {
         return this.db;
     }
-
+    if (DB) {
+        return this.db = DB;
+    }
     let url = defaults.url;
     if (!url) {
         url = defaults.user ? `redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}` : `redis://${defaults.host}:${defaults.port}`;
     }
-    return this.db = await createClient(url).on("error", err => console.error(err)).connect();
+    return this.db = DB = await createClient(url).on("error", err => console.error(err)).connect();
 };
 
 RedisDB.prototype.close = async function () {
-    // this.db.client.disconnect();
-    this.db = null;
+    DB && (await this.db.disconnect()); // this.db.client.disconnect();
+    this.db = DB = null;
     return this;
 };
 
@@ -87,22 +89,22 @@ RedisDB.prototype.clear = function () {
 
 function create_result(range, type, resolve, enrich) {
     if (resolve) {
-        for (let i = 0, tmp, id; i < range.length; i++) {
-            tmp = range[i];
-            id = "number" === type ? parseInt(tmp.value || tmp, 10) : tmp.value || tmp;
-            range[i] = /*enrich
-                       ? { id, doc: tmp.doc }
-                       :*/id;
+        if ("number" === type) {
+            for (let i = 0, tmp, id; i < range.length; i++) {
+                tmp = range[i];
+                id = "number" === type ? parseInt(tmp.id || tmp, 10) : tmp.id || tmp;
+                range[i] = enrich ? { id, doc: tmp.doc } : id;
+            }
         }
         return range;
     } else {
         let result = [];
         for (let i = 0, tmp, id, score; i < range.length; i++) {
             tmp = range[i];
-            id = "number" === type ? parseInt(tmp.value, 10) : tmp.value;
+            id = "number" === type ? parseInt(tmp.id || tmp, 10) : tmp.id || tmp;
             score = tmp.score;
             result[score] || (result[score] = []);
-            result[score].push(enrich ? { id, doc: tmp.doc } : id);
+            result[score].push(id);
         }
         return result;
     }
diff --git a/src/db/redis/index.js b/src/db/redis/index.js
index 7ee0a5e..529d3a2 100644
--- a/src/db/redis/index.js
+++ b/src/db/redis/index.js
@@ -71,7 +71,7 @@ RedisDB.prototype.open = async function(){
             ? `redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`
             : `redis://${defaults.host}:${defaults.port}`;
     }
-    return this.db =
+    return this.db = DB =
         await createClient(url)
         .on("error", err => console.error(err))
         .connect();
@@ -79,7 +79,7 @@ RedisDB.prototype.open = async function(){
 
 RedisDB.prototype.close = async function(){
     DB && await this.db.disconnect(); // this.db.client.disconnect();
-    this.db = null;
+    this.db = DB = null;
     return this;
 };
 
@@ -100,31 +100,29 @@ RedisDB.prototype.clear = function(){
 
 function create_result(range, type, resolve, enrich){
     if(resolve){
-        for(let i = 0, tmp, id; i < range.length; i++){
-            tmp = range[i];
-            id = type === "number"
-                ? parseInt(tmp.value || tmp, 10)
-                : tmp.value || tmp;
-            range[i] = /*enrich
-                ? { id, doc: tmp.doc }
-                :*/ id;
+        if(type === "number"){
+            for(let i = 0, tmp, id; i < range.length; i++){
+                tmp = range[i];
+                id = type === "number"
+                    ? parseInt(tmp.id || tmp, 10)
+                    : tmp.id || tmp;
+                range[i] = enrich
+                    ? { id, doc: tmp.doc }
+                    : id;
+            }
         }
         return range;
     }
-    else{
+    else {
         let result = [];
         for(let i = 0, tmp, id, score; i < range.length; i++){
             tmp = range[i];
             id = type === "number"
-                ? parseInt(tmp.value, 10)
-                : tmp.value
+                ? parseInt(tmp.id || tmp, 10)
+                : tmp.id || tmp;
             score = tmp.score;
             result[score] || (result[score] = []);
-            result[score].push(
-                enrich
-                    ? { id, doc: tmp.doc }
-                    : id
-            );
+            result[score].push(id);
         }
         return result;
     }