def get_most_recent_donation(self):
try:
query = (Transaction.select().order_by(Transaction.id.desc()))
return list(query)[0].donation_amount
except Exception as e:
logging.info('Error retrieving most recent donation')
logging.info(e)
def get_donors(self):
try:
query = (Transaction.select(Transaction.donor_name).distinct())
return [i.donor_name for i in query]
except Exception as e:
logging.info('Failed to retrieve donor names')
logging.info(e)
def get_sum_donations(self):
try:
query = (Transaction.select(Transaction.donation_amount).where(
Transaction.donor_name == self.name))
return float(sum([i.donation_amount for i in query]))
except Exception as e:
logging.info('Error calculating sum of donations')
logging.info(e)
def get_num_donations(self):
try:
query = (Transaction.select(Transaction.donation_amount).where(
Transaction.donor_name == self.name))
return len(query)
except Exception as e:
logging.info('Error calculating number of donations')
logging.info(e)
def get_average_donation(self):
try:
query = (Transaction.select(Transaction.donation_amount).where(
Transaction.donor_name == self.name))
return float(sum([i.donation_amount for i in query]) / len(query))
except Exception as e:
logging.info('Error calculating average donation')
logging.info(e)
def update_row(self):
try:
query = (Transaction.select().execute())
for row in query:
print('{:8} {:18} {:8}'.format(row.id, row.donor_name,
row.donation_amount))
idx = input('Select the index of the transaction you want '
'to update')
new_value = input('Enter the new amount')
query = (Transaction.update(donation_amount=new_value).where(
Transaction.id == idx).execute())
logging.info('Successfully updated row')
except Exception as e:
logging.info('Error updating row')
logging.info(e)
def delete_row(self):
"""I don't want to delete transactions where one user made the
same donation multiple times, which would occur if I deleted
based on donor name and transaction amount. So I will give the
user the list of transactions and have the user delete based
on index"""
try:
query = (Transaction.select().execute())
for row in query:
print('{:8} {:18} {:8}'.format(row.id, row.donor_name,
row.donation_amount))
idx = input('Select the index of the transaction you want'
' to delete')
query = (Transaction.delete().where(
Transaction.id == idx).execute())
logging.info('Successfully deleted row')
except Exception as e:
logging.info('Error deleting row')
logging.info(e)