def from_json(cls, json_map):
if type(json_map) is str:
json_map = json.loads(json_map)
c = cls(Student.from_json(json_map["student"]),
Book.from_json(json_map["book"]), json_map["created_at"],
json_map["redeemed"], json_map["redemption_key"])
return c
def _fetch_data(self):
# We wrap it in a try/except so the app doesn't crash
try:
# Emits that fetching is about to occur
self.network_state.emit({'state': NetworkState.active})
# Gets the data in a GET request from the server
r = requests.get(self.url)
# Raises an exception if the response returned a non-200 status code
r.raise_for_status()
# Parses the response as JSON
js = r.json()
# Makes a list of books from the JSON
self.books = [Book.from_json(j) for j in js["books"]]
# And emits that the fetching has been completed, alongside the list of books
# These will later be passed to the list model
self.network_state.emit({
"state": NetworkState.done,
"data": self.books
})
# In the case something bad happens...
except Exception as e:
# ...print the error...
print(e)
# ...and emit it.
self.network_state.emit({
"state": NetworkState.error,
"error": str(e)
})
def _fetch_data(self):
# We wrap it in a try/except in case it fails
try:
# Emit that we're fethcing data
self.network_state.emit({'state': NetworkState.active})
# Get the data from the server in a GET request
r = requests.get(self.url)
# Raise if the response code is anything non-200
r.raise_for_status()
# Parse the response as JSON
js = r.json()
# Parse the JSON as a Book
self.book = Book.from_json(js["book"])
# And emit the book while saying the fetching is done
self.network_state.emit(
{
"state": NetworkState.done,
"data": self.book.__dict__
}
)
# If it is not successful...
except Exception as e:
# ...show the error...
print(e)
# ...and emit it
self.network_state.emit(
{
"state": NetworkState.error,
"error": str(e)
}
)