Flake8 Bugbear checks for some extra things that aren’t code style
errors, but are likely to introduce bugs or unexpected behaviour. A
good example is having mutable default function arguments, which get
shared between every call to the function and therefore mutating a value
in one place can unexpectedly cause it to change in another.
This commit enables all the extra warnings provided by Flake8 Bugbear,
except for:
- the line length one (because we already lint for that separately)
- B903 Data class should either be immutable or use `__slots__` because
this seems to false-positive on some of our custom exceptions
- B902 Invalid first argument 'cls' used for instance method because
some SQLAlchemy decorators (eg `declared_attr`) make things that
aren’t formally class methods take a class not an instance as their
first argument
It disables:
- _B306: BaseException.message is removed in Python 3_ because I think
our exceptions have a custom structure that means the `.message`
attribute is still present
Matches the work done in other repos:
- https://github.com/alphagov/notifications-admin/pull/3172/files
New rows giving the prices of letters with a post_class of `europe` and
`rest-of-world` have been added to the `letter_rates` table. All rates
are currently the same for international letters.
the queries all return lots of columns, but each query has columns it
doesn't care about. eg emails don't have billable units or international
flag, letters don't have international flag, sms don't have a page count
etc. additionally, the query was grouping on things that never change,
like service id and notification type.
by making all of these literals (as in `select 1 as foo`) we see times
that are over 50% quicker for gov.uk email service.
Note: One of the tests changed because previously it involved emails and
sms with statuses that they could never be (eg returned-letter)
sms and emails have a very predictable 72 hour lifecycle. letters, on
the other hand, have ridiculously complex lifecycles - they might not
get sent because it's a weekend, they might not get sent because they're
second class and are only processed on alternate days, they might not
get sent because a different letter in the same batch had an error that
we didn't know about. Either way, it's apparent that four days is
definitely not enough time to guarantee that letters have gone from
sending to delivered.
Extend the amount of days we process for letters to 10 days. Keep emails
and sms down at 4 to keep run-times shorter
We're deliberately not thinking about returned letters here at all.
it makes less sense once we introduce different start dates for letters
and emails. Also, we never use it, since we just call the day tasks
ourselves from commands.py
the nightly task won't be affected, it'll just trigger three times more
sub-tasks.
this doesn't need to be a two-part deploy because we only trigger this
overnight, so as long as the deploy completes in daytime we don't need
to worry about celery task signatures
the nightly tasks need to run after the create nightly notification
status task - so that test notifications are still there to record
stats for, and to stop the risk of deleting notificaitons part-way
through recording stats for them.
the create_nightly_notification_status task runs at 00:30am UK time,
however this means that in summer datetime.today() will return the
wrong date as the server (which runs on UTC) will run the task at
23:30 (populating the wrong row in the table).
fix this to use nice tz aware functions
make a decorator that pings cronitor before and after each task run.
Designed for use with nightly tasks, so we have visibility if they
fail. We have a bunch of cronitor monitors set up - 5 character keys
that go into a URL that we then make a GET to with a self-explanatory
url path (run/fail/complete).
the cronitor URLs are defined in the credentials repo as a dictionary
of celery task names to URL slugs. If the name passed in to the
decorator isn't in that dict, it won't run.
to use it, all you need to do is call `@cronitor(my_task_name)`
instead of `@notify_celery.task`, and make sure that the task name and
the matching slug are included in the credentials repo (or locally,
json dumped and stored in the CRONITOR_KEYS environment variable)
* Changed update_fact_billing DAO function to update the table with the
real data for postage instead of hard-coding in 'second'.
* Added a test for the create nightly billing task to test that rows
with different postage are being inserted correctly.
Removed the occasionally failing test to check how ft_billing upserts
postage data. This test will be re-added once the postage column has been
added to the primary key.
* Updated the 'fetch_billing_data_for_day' DAO function to take postage into
account
* Updated the 'update_fact_billing' DAO function to insert postage for
new rows. When updating rows which are identical apart from the postage, the
original row will be kept. (This behaviour will change once postage is
added to the primary key - at this point, upserting will add a new row.)
* Also changed some fixtures / test set up functions to take postage
into account
Added the letter_rate table to the list of tables which does not get
deleted after each test run and changed the tests to use the real letter
rates.
Also removed the letter rate DAO since this was only being used in
tests, so was no longer needed.
`created_at` was added previously and made nullable temporarily. This
commit now populates the column, ensures that it will always have a
value, and makes `created_at` non-nullable.
