def delete_exercise(user_id, exercise_id):
"""
Submit a request to have an exercise deleted.
:param exercise_id: ID of the exercise we're requesting to have deleted
:return: Nothing.
"""
conn = eng.connect()
exercise_parm = bindparam("exercise_id", type_=Integer)
user_parm = bindparam("user_id", type_=String)
query = select([exercise_table.c.id]).where(
and_(exercise_table.c.id == exercise_parm, exercise_table.c.user_id == user_parm)
)
is_valid_user = conn.execute(query, exercise_id=exercise_id, user_id=user_id).fetchone()
if is_valid_user:
with conn.begin() as trans:
query = attempt_table.delete().where(attempt_table.c.exercise_id == exercise_parm)
conn.execute(query, exercise_id=exercise_id)
query = resource_by_exercise_table.delete().where(resource_by_exercise_table.c.exercise_id == exercise_parm)
conn.execute(query, exercise_id=exercise_id)
query = exercise_table.delete().where(exercise_table.c.id == exercise_parm)
conn.execute(query, exercise_id=exercise_id)
trans.commit()
msg = "Executed deleteion query on exercise: {} belonging to user: {}".format(exercise_id, user_id)
else:
msg = "User: {} not the owner of exercise: {}".format(user_id, exercise_id)
conn.close()
return msg
def delete_resource(user_id, resource_id):
conn = eng.connect()
user_parm = bindparam("user_id", type_=String)
resource_parm = bindparam("resource_id", type_=Integer)
query = select([resource_table.c.id]).where(
and_(resource_table.c.id == resource_parm, resource_table.c.user_id == user_parm)
)
is_valid_user = conn.execute(query, user_id=user_id, resource_id=resource_id).fetchone()
if is_valid_user:
with conn.begin() as trans:
query = resource_by_exercise_table.delete().where(resource_by_exercise_table.c.resource_id == resource_parm)
conn.execute(query, resource_id=resource_id)
query = resource_table.delete().where(resource_table.c.id == resource_parm)
conn.execute(query, resource_id=resource_id)
trans.commit()
conn.close()
return "FINISHED"