device dao changed

dao/device/device.py

-import psycopg2
 from psycopg2 import sql
-import bcrypt
+from misc import with_psql
 
-
-class DeviceDao:
-    
-    def __init__(self):
-        pass
-
-    # decorator implementation
-    def with_psql(f):
-        def _with_psql(*args, **kwargs):
-            conn = psycopg2.connect('dbname=gateway')
-            cur = conn.cursor()
-
-            try:
-                res = f(cur, *args, **kwargs)
-            except (Exception, psycopg2.DatabaseError) as error:
-                conn.rollback()
-                res = (False, error)
-            else:
-                conn.commit()
-            finally:
-                cur.close()
-                conn.close()
-    
-            return res
-        return _with_psql
-
-    @staticmethod
-    @with_psql
-    def create_datatable(cur, appkey, dev_id):
+@with_psql
+def create_datatable(cur, appkey, dev_id):
     tn = 'dev_' +str(appkey)+ '_' +str(dev_id)
     cur.execute(
         sql.SQL(
@@ -43,9 +15,8 @@ class DeviceDao:
     return (True,)
 
     
-    @staticmethod
-    @with_psql
-    def delete_datatable(cur, appkey, dev_id):
+@with_psql
+def delete_datatable(cur, appkey, dev_id):
     tn = 'dev_' +str(appkey)+ '_' +str(dev_id)
     cur.execute(
         psycopg2.sql.SQL(
@@ -53,9 +24,8 @@ class DeviceDao:
         ).format(sql.Identifier(tn)))
     return (True,)
 
-    @staticmethod
-    @with_psql
-    def create_table(cur, appkey):
+@with_psql
+def create_table(cur, appkey):
     tn = 'devices_' +str(appkey)
     cur.execute(
         sql.SQL(
@@ -68,9 +38,8 @@ class DeviceDao:
     return (True,)
 
     
-    @staticmethod
-    @with_psql
-    def delete_table(cur, appkey):
+@with_psql
+def delete_table(cur, appkey):
     tn = 'devices_' +str(appkey)
     cur.execute(
         psycopg2.sql.SQL(
@@ -78,12 +47,8 @@ class DeviceDao:
         ).format(sql.Identifier(tn)))
     return (True,)
 
-
-
-
-    @staticmethod
-    @with_psql
-    def create(cur, name, dev_id, appkey, desc):
+@with_psql
+def create(cur, name, dev_id, appkey, desc):
     tn = 'devices_' +str(appkey)
     query = """
     INSERT INTO 
@@ -96,9 +61,8 @@ class DeviceDao:
     return (True,)
 
 
-    @staticmethod
-    @with_psql
-    def delete(cur, appkey, dev_id):
+@with_psql
+def delete(cur, appkey, dev_id):
     tn = 'devices_' +str(appkey)
     query = """
     DELETE FROM 
@@ -111,9 +75,8 @@ class DeviceDao:
     return (True,)
 
 
-    @staticmethod
-    @with_psql
-    def get(cur, appkey, dev_id):
+@with_psql
+def get(cur, appkey, dev_id):
     tn = 'devices_' +str(appkey)
     query = """
     SELECT * FROM 
@@ -131,9 +94,8 @@ class DeviceDao:
         return (True, dev)
 
 
-    @staticmethod
-    @with_psql
-    def get_list(cur, appkey):
+@with_psql
+def get_list(cur, appkey):
     tn = 'devices_' +str(appkey)
     query = """
     SELECT * FROM 

server.py

@@ -98,12 +98,11 @@ def new_application():
 def app():
     if 'name' in session:
         if request.method == 'GET':
-            dh = dd.DeviceDao()
             
             session['appkey'] = request.args.get('appkey')
 
             app = ad.get(session['appkey'])
-            devs = dh.get_list(app[1][1])
+            devs = dd.get_list(app[1][1])
         
             try:
                 filelist = [f for f in os.listdir(DATA_DOWNLOAD_DIR) if f.startswith(session['appkey'])]
@@ -125,8 +124,7 @@ def app():
                 if not res[0]:
                     return render_template('new-app.html', feedback=res[1])
             
-                dh = dd.DeviceDao()
-                res = dh.create_table(appkey)
+                res = dd.create_table(appkey)
             
                 if not res[0]:
                     ad.delete(appkey)
@@ -139,13 +137,12 @@ def app():
 @server.route('/delete-app')
 def delete_app():
     if 'name' in session:
-        dh = dd.DeviceDao()
-        devs = dh.get_list(session['appkey'])
+        devs = dd.get_list(session['appkey'])
     
         for dev in devs[1]:
             data.delete_table(session['appkey'], dev[1])
     
-        dh.delete_table(session['appkey'])
+        dd.delete_table(session['appkey'])
     
         res = ad.delete(session['appkey'])
     
@@ -160,8 +157,7 @@ def delete_app():
 @server.route('/add-dev')
 def new_dev():
     if 'name' in session:
-        dh = dd.DeviceDao()
-        dev_list = dh.get_list(session['appkey'])
+        dev_list = dd.get_list(session['appkey'])
     
     #print('dev list : ', dev_list)
 
@@ -177,9 +173,8 @@ def new_dev():
 @server.route('/dev', methods=['GET', 'POST'])
 def dev():
     if 'name' in session:
-        dh = dd.DeviceDao()
         if request.method == 'GET':
-            dev = dh.get(session['appkey'], request.args.get('id'))
+            dev = dd.get(session['appkey'], request.args.get('id'))
 
             session['devid'] = dev[1][1]
             session['devname'] = dev[1][0]
@@ -193,7 +188,7 @@ def dev():
 
             return render_template('dev.html', dev=dev[1], appkey=session['appkey'], ltup=ltup)
         else:
-            res = dh.create(request.form['devname'], request.form['devid'], session['appkey'], request.form['devdesc'])
+            res = dd.create(request.form['devname'], request.form['devid'], session['appkey'], request.form['devdesc'])
 
             if not res[0]:
                 return render_template('add-dev.html', feedback=res[1])
@@ -201,7 +196,7 @@ def dev():
                 res = data.create_table(session['appkey'], request.form['devid'])
             
                 if not res[0]:
-                    dh.delete(session['appkey'], request.form['devid'])
+                    dd.delete(session['appkey'], request.form['devid'])
                     return render_template('add-dev.html', feedback=res[1])
                 else:
                     return redirect(url_for('app', appkey=session['appkey']))
@@ -244,9 +239,8 @@ def dev_conf():
 @server.route('/delete-dev')
 def delete_dev():
     if 'name' in session and 'devid' in session:
-        dh = dd.DeviceDao()
         data.delete_table(session['appkey'], session['devid'])
-        res = dh.delete(session['appkey'], session['devid'])
+        res = dd.delete(session['appkey'], session['devid'])
 
         return redirect(url_for('app', appkey=session['appkey']))
     else: