mysql2 and async/await

functions/methods.ts

 const dbconn = require('../config/dbconn');
 
 var methods = {
-    getAllMailinglists: function(callback:any) {
-        dbconn.project.query('CALL getAllLists', function (err:any, rows:any){
-            if (err) throw err;
-            callback(rows[0], err);
-	    })
+    getAllMailinglists: async function() {
+        try {
+            let rows:any = await dbconn.project.promise().query('CALL getAllLists')
+            if (rows[0][0]) {
+                return rows[0][0]
+            } else { return null }
+        } catch (err) {
+            console.error(err)
+        }
+        return null
     },
-    getProjectOverviewById: function(projectId:number, callback:any) {
-        dbconn.project.query('CALL GetProjectInformationByProjectID(' + projectId+ ')', function (err:any, rows:any){
-            if (err) throw err;
-            callback(rows[0], err);
-    	})
+    getProjectOverviewById: async function(projectId:number) {
+        try {
+            let rows:any = await dbconn.project.promise().query('CALL GetProjectInformationByProjectID(' + projectId+ ')')
+            if (rows[0][0]) {
+                return rows[0][0]
+            } else { return null }
+        } catch (err) {
+            console.error(err)
+        }
+        return null
     },
-    getProjectImagesById: function(projectId:number, callback:any) {
-        dbconn.project.query('CALL getImagesByProjectID(' + projectId+ ')', function (err:any, rows:any){
-            if (err) throw err;
-            callback(rows[0], err);
-        })
+    getProjectImagesById: async function(projectId:number) {
+        try {
+            let rows:any = await dbconn.project.promise().query('CALL getImagesByProjectID(' + projectId+ ')')
+            if (rows[0][0]) {
+                return rows[0][0]
+            } else { return null }
+        } catch (err) {
+            console.error(err)
+        }
+        return null
     }
 };