Open and close the db connection at the beginning and end of each request.

data/database.py

@@ -1,4 +1,5 @@
 import string
+import logging
 
 from random import SystemRandom
 from datetime import datetime
@@ -8,10 +9,26 @@ from peewee import create_model_tables
 from app import app
 
 
+logger = logging.getLogger(__name__)
 db = app.config['DB_DRIVER'](app.config['DB_NAME'],
                              **app.config['DB_CONNECTION_ARGS'])
 
 
+def connect_db():
+  logger.debug('Connectin to database.')
+  db.connect()
+
+
+def close_db(exc):
+  if not db.is_closed():
+    logger.debug('Disconnecting from database.')
+    db.close()
+
+
+app.before_request(connect_db)
+app.teardown_request(close_db)
+
+
 class BaseModel(Model):
   class Meta:
     database = db