diff --git a/JavaScript/b-transport/db.js b/JavaScript/b-transport/db.js
index 5e26018..32d7bc7 100644
--- a/JavaScript/b-transport/db.js
+++ b/JavaScript/b-transport/db.js
@@ -11,8 +11,8 @@ const crud = (pool) => (table) => ({
   async read(id, fields = ['*']) {
     const names = fields.join(', ');
     const sql = `SELECT ${names} FROM ${table}`;
-    if (!id) return pool.query(sql);
-    return pool.query(`${sql} WHERE id = $1`, [id]);
+    if (!id) return this.query(sql);
+    return this.query(`${sql} WHERE id = $1`, [id]);
   },
 
   async create({ ...record }) {
@@ -27,7 +27,7 @@ const crud = (pool) => (table) => ({
     const fields = '"' + keys.join('", "') + '"';
     const params = nums.join(', ');
     const sql = `INSERT INTO "${table}" (${fields}) VALUES (${params})`;
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async update(id, { ...record }) {
@@ -42,12 +42,12 @@ const crud = (pool) => (table) => ({
     const delta = updates.join(', ');
     const sql = `UPDATE ${table} SET ${delta} WHERE id = $${++i}`;
     data.push(id);
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async delete(id) {
     const sql = 'DELETE FROM ${table} WHERE id = $1';
-    return pool.query(sql, [id]);
+    return this.query(sql, [id]);
   },
 });
 
diff --git a/JavaScript/b-transport/transport/http.js b/JavaScript/b-transport/transport/http.js
index fda7506..80851f1 100644
--- a/JavaScript/b-transport/transport/http.js
+++ b/JavaScript/b-transport/transport/http.js
@@ -32,7 +32,7 @@ module.exports = (routing, port, console) => {
     if (!handler) return res.end('"Not found"');
     const { args } = await receiveArgs(req);
     console.log(`${socket.remoteAddress} ${method} ${url}`);
-    const result = await handler(args);
+    const result = await handler(...args);
     res.end(JSON.stringify(result));
   }).listen(port);
 
diff --git a/JavaScript/c-commonjs/db.js b/JavaScript/c-commonjs/db.js
index 45a4a52..59e865f 100644
--- a/JavaScript/c-commonjs/db.js
+++ b/JavaScript/c-commonjs/db.js
@@ -17,8 +17,8 @@ const crud = (table) => ({
   async read(id, fields = ['*']) {
     const names = fields.join(', ');
     const sql = `SELECT ${names} FROM ${table}`;
-    if (!id) return pool.query(sql);
-    return pool.query(`${sql} WHERE id = $1`, [id]);
+    if (!id) return this.query(sql);
+    return this.query(`${sql} WHERE id = $1`, [id]);
   },
 
   async create({ ...record }) {
@@ -33,7 +33,7 @@ const crud = (table) => ({
     const fields = '"' + keys.join('", "') + '"';
     const params = nums.join(', ');
     const sql = `INSERT INTO "${table}" (${fields}) VALUES (${params})`;
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async update(id, { ...record }) {
@@ -48,12 +48,12 @@ const crud = (table) => ({
     const delta = updates.join(', ');
     const sql = `UPDATE ${table} SET ${delta} WHERE id = $${++i}`;
     data.push(id);
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async delete(id) {
     const sql = 'DELETE FROM ${table} WHERE id = $1';
-    return pool.query(sql, [id]);
+    return this.query(sql, [id]);
   },
 });
 
diff --git a/JavaScript/c-commonjs/transport/http.js b/JavaScript/c-commonjs/transport/http.js
index fda7506..80851f1 100644
--- a/JavaScript/c-commonjs/transport/http.js
+++ b/JavaScript/c-commonjs/transport/http.js
@@ -32,7 +32,7 @@ module.exports = (routing, port, console) => {
     if (!handler) return res.end('"Not found"');
     const { args } = await receiveArgs(req);
     console.log(`${socket.remoteAddress} ${method} ${url}`);
-    const result = await handler(args);
+    const result = await handler(...args);
     res.end(JSON.stringify(result));
   }).listen(port);
 
diff --git a/JavaScript/d-messenger/lib/db.js b/JavaScript/d-messenger/lib/db.js
index 5e26018..32d7bc7 100644
--- a/JavaScript/d-messenger/lib/db.js
+++ b/JavaScript/d-messenger/lib/db.js
@@ -11,8 +11,8 @@ const crud = (pool) => (table) => ({
   async read(id, fields = ['*']) {
     const names = fields.join(', ');
     const sql = `SELECT ${names} FROM ${table}`;
-    if (!id) return pool.query(sql);
-    return pool.query(`${sql} WHERE id = $1`, [id]);
+    if (!id) return this.query(sql);
+    return this.query(`${sql} WHERE id = $1`, [id]);
   },
 
   async create({ ...record }) {
@@ -27,7 +27,7 @@ const crud = (pool) => (table) => ({
     const fields = '"' + keys.join('", "') + '"';
     const params = nums.join(', ');
     const sql = `INSERT INTO "${table}" (${fields}) VALUES (${params})`;
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async update(id, { ...record }) {
@@ -42,12 +42,12 @@ const crud = (pool) => (table) => ({
     const delta = updates.join(', ');
     const sql = `UPDATE ${table} SET ${delta} WHERE id = $${++i}`;
     data.push(id);
-    return pool.query(sql, data);
+    return this.query(sql, data);
   },
 
   async delete(id) {
     const sql = 'DELETE FROM ${table} WHERE id = $1';
-    return pool.query(sql, [id]);
+    return this.query(sql, [id]);
   },
 });