def _updateTrail(self, trailId):
try:
trail = Key("Trail", long(trailId)).get()
if(trail is not None):
'''
Try to update the trail. Returns the updated trail as a JSON object.
First the properties that are not related to the file upload are updated.
'''
trail.title = self.request.get('title')
trail.militaryMap= self.request.get('militaryMap')
trail.timeDurationHours= self.request.get('timeDurationHours')
trail.nearestCity= self.request.get('nearestCity')
trail.tags= self.request.get('tags').split(',')
'''
Check if there is a newly uploaded file that superseeds the old data.
'''
uploadedFiles = self.get_uploads('file') # 'file' is file upload field in the form
if(len(uploadedFiles) > 0):
blobInfo = uploadedFiles[0]
blobReader = blobInfo.open()
parser = KmlParser()
trailInfo = parser.parseKml(blobReader)
trail.extension = trailInfo['extension']
trail.slope = trailInfo['slope']
trail.points = simplejson.dumps(trailInfo['points'])
trail.startPoint = trailInfo['startPoint']
blobInfo.delete()
#Save the updated trail.
trail.save()
#log action
usr = users.get_current_user()
if(usr is not None):
logEntry = ActivityLog(user=usr, action="Update - Trail")
logEntry.put()
self.response.clear()
self.response.set_status(200)
else:
self.error(404)
except:
logging.exception("An exception occurred when updating the trail")
self.error(500)
