Added airport manager

ogn/commands/__init__.py

@@ -1,4 +1,5 @@
 from .database import manager as database_manager
+from .showairport import manager as show_airport_manager
 from .showreceiver import manager as show_receiver_manager
 from .showdevices import manager as show_devices_manager
 from .logbook import manager as logbook_manager
@@ -8,6 +9,7 @@ from manager import Manager
 manager = Manager()
 
 manager.merge(database_manager, namespace='db')
+manager.merge(show_airport_manager, namespace='show.airport')
 manager.merge(show_receiver_manager, namespace='show.receiver')
 manager.merge(show_devices_manager, namespace='show.devices')
 manager.merge(logbook_manager, namespace='logbook')

ogn/commands/showairport.py

@@ -0,0 +1,16 @@
+from ogn.model import Airport
+from ogn.commands.dbutils import session
+
+from manager import Manager
+manager = Manager()
+
+
+@manager.command
+def list_all():
+    """Show a list of all airports."""
+    query = session.query(Airport) \
+        .order_by(Airport.name)
+
+    print('--- Airports ---')
+    for airport in query.all():
+        print(airport.name)