Consistent relations and backrefs

ogn/backend/liveglidernet.py

@@ -59,8 +59,8 @@ def lxml(session, show_offline=False, lat_max=90, lat_min=-90, lon_max=180, lon_
     for [aircraft_beacon, device] in position_query.all():
         code = encode(device.address)
 
-        if len(device.informations) > 0:
+        if len(device.infos) > 0:
-            device_info = device.informations[0]
+            device_info = device.infos[0]
             if device_info and (not device_info.tracked or not device_info.identified):
                 continue
 

ogn/model/aircraft_beacon.py

@@ -43,10 +43,10 @@ class AircraftBeacon(Beacon):
 
     # Relations
     receiver_id = Column(Integer, ForeignKey('receiver.id', ondelete='SET NULL'))
-    receiver = relationship('Receiver', foreign_keys=[receiver_id])
+    receiver = relationship('Receiver', foreign_keys=[receiver_id], backref='aircraft_beacons')
 
     device_id = Column(Integer, ForeignKey('device.id', ondelete='SET NULL'))
-    device = relationship('Device', foreign_keys=[device_id])
+    device = relationship('Device', foreign_keys=[device_id], backref='aircraft_beacons')
 
     # Multi-column indices
     Index('ix_aircraft_beacon_receiver_id_receiver_name', 'receiver_id', 'receiver_name')

ogn/model/airport.py

@@ -22,9 +22,6 @@ class Airport(Base):
     runway_length = Column(Integer)
     frequency = Column(Float)
 
-    # Relations
-    takeoff_landings = relationship('TakeoffLanding')
-
     def __repr__(self):
         return "<Airport %s: %s,%s,%s,%s,%s,%s,%s,%s,%s,% s>" % (
             self.name,

ogn/model/device.py

@@ -17,10 +17,6 @@ class Device(Base):
     hardware_version = Column(SmallInteger)
     real_address = Column(String(6))
 
-    # Relations
-    aircraft_beacons = relationship('AircraftBeacon')
-    informations = relationship('DeviceInfo', backref="device")
-
     def __repr__(self):
         return "<Device: %s,%s,%s,%s,%s,%s>" % (
             self.address,

ogn/model/device_info.py

@@ -21,6 +21,7 @@ class DeviceInfo(Base):
 
     # Relations
     device_id = Column(Integer, ForeignKey('device.id', ondelete='SET NULL'), index=True)
+    device = relationship('Device', foreign_keys=[device_id], backref='infos')
 
     def __repr__(self):
         return "<DeviceInfo: %s,%s,%s,%s,%s,%s,%s,%s,%s>" % (

ogn/model/device_stats.py

@@ -16,7 +16,7 @@ class DeviceStats(Base):
 
     # Relations
     device_id = Column(Integer, ForeignKey('device.id', ondelete='SET NULL'), index=True)
-    device = relationship('Device', foreign_keys=[device_id])
+    device = relationship('Device', foreign_keys=[device_id], backref='stats')
 
     def __repr__(self):
         return "<DeviceStats: %s,%s,%s,%s>" % (

ogn/model/receiver.py

@@ -22,10 +22,6 @@ class Receiver(Base):
     version = Column(String)
     platform = Column(String)
 
-    # Relations
-    aircraft_beacons = relationship('AircraftBeacon')
-    receiver_beacons = relationship('ReceiverBeacon')
-
     @property
     def location(self):
         if self.location_wkt is None:

ogn/model/receiver_beacon.py

@@ -35,7 +35,7 @@ class ReceiverBeacon(Beacon):
 
     # Relations
     receiver_id = Column(Integer, ForeignKey('receiver.id', ondelete='SET NULL'))
-    receiver = relationship('Receiver', foreign_keys=[receiver_id])
+    receiver = relationship('Receiver', foreign_keys=[receiver_id], backref='receiver_beacons')
 
     # Multi-column indices
     Index('ix_receiver_beacon_receiver_id_name', 'receiver_id', 'name')

ogn/model/receiver_stats.py

@@ -17,4 +17,4 @@ class ReceiverStats(Base):
 
     # Relations
     receiver_id = Column(Integer, ForeignKey('receiver.id', ondelete='SET NULL'), index=True)
-    receiver = relationship('Receiver', foreign_keys=[receiver_id])
+    receiver = relationship('Receiver', foreign_keys=[receiver_id], backref='stats')

ogn/model/takeoff_landing.py

@@ -15,7 +15,7 @@ class TakeoffLanding(Base):
 
     # Relations
     airport_id = Column(Integer, ForeignKey('airport.id', ondelete='SET NULL'), index=True)
-    airport = relationship('Airport', foreign_keys=[airport_id])
+    airport = relationship('Airport', foreign_keys=[airport_id], backref='takeoff_landings')
 
     device_id = Column(Integer, ForeignKey('device.id', ondelete='SET NULL'), index=True)
-    device = relationship('Device', foreign_keys=[device_id])
+    device = relationship('Device', foreign_keys=[device_id], backref='takeoff_landings')