GAE python27 return nested json - json

Question

This seems such a simple task, yet it eludes me...
class ViewAllDogs(webapp2.RequestHandler):
""" Returns an array of json objects representing all dogs. """
def get(self):
query = Dog.query()
results = query.fetch(limit = MAX_DOGS) # 100
aList = []
for match in results:
aList.append({'id': match.id, 'name': match.name,
'owner': match.owner, arrival_date':match.arrival_date})
aList.append({'departure_history':{'departure_date': match.departure_date,
'departed_dog': match.departed_dog}})
self.response.headers['Content-Type'] = 'application/json'
self.response.write(json.dumps(aList))
The above, my best attempt to date, gets me:
[
{
"arrival_date": null,
"id": "a link to self",
"owner": 354773,
"name": "Rover"
},
{
"departure_history": {
"departed_dog": "Jake",
"departure_date": 04/24/2017
}
},
# json array of objects continues...
]
What I'm trying to get is the departure_history nested:
[
{
"id": "a link to self...",
"owner": 354773,
"name": "Rover",
"departure_history": {
"departed_dog": "Jake",
"departure_date": 04/24/2017
},
"arrival_date": 04/25/2017,
},
# json array of objects continues...
]
I've tried a bunch of different combinations, looked at json docs, python27 docs, no joy, and burned about way too many hours with this. I got this far with the many related SO posts on this topic. Thanks in advance.

Answer 1

You can simplify a little:
aList = []
for match in results:
aDog = {'id': match.id,
'name': match.name,
'owner': match.owner,
'arrival_date':match.arrival_date,
'departure_history': {
'departure_date': match.departure_date,
'departed_dog': match.departed_dog}
}
aList.append(aDog)

Answer 2

This seems a bit hackish, but it works. If you know a better way, by all means, let me know. Thanks.
class ViewAllDogs(webapp2.RequestHandler):
""" Returns an array of json objects representing all dogs. """
def get(self):
query = Dog.query()
results = query.fetch(limit = MAX_DOGS) # 100
aList = []
i = 0
for match in results:
aList.append({'id': match.id, 'name': match.name,
'owner': match.owner, arrival_date':match.arrival_date})
aList[i]['departure_history'] = ({'departure_history':{'departure_date': match.departure_date,
'departed_dog': match.departed_dog}})
i += 1
self.response.headers['Content-Type'] = 'application/json'
self.response.write(json.dumps(aList))