We were using `.order_by('user_profile_id', '-timestamp') in our
UserPresence query in get_status_dicts_for_query.
We don't need a full sort to produce the dictionary of statuses.
In fact the whole operation in Python is still O(N):
- divvy rows up to be per-user in an O(N) pass
- find max row for the 'aggregated' entry in an O(n) pass
per user
The one minor annoyance of this fix is that datetime_to_timestamp
is lossy, so if you naively call to_presence_dict before finding
the "max" row, you get test flakes if rows are created during the
same second. I decided to avoid calling to_presence_dict so there
are fewer moving parts, but there's still the ugly step of having
to remove the "dt" field from the final results.
The commit() call in fix() breaks migrations and tests (unless you
mock) due to outer transactions.
We now explicitly call commit() from the management command.
Usually a small minority of users are eligible to receive missed
message emails or mobile notifications.
We now filter users first before hitting UserPresence to find idle
users. We also simply check for the existence of recent activity
rather than borrowing the more complicated data structures that we
use for the buddy list.
Use jQuery DOM construction methods, rather than string concatenation,
to keep things structured and to stay clear of the lint rules introduced
in ee6235d71.
Until we get search bubbles, the search text is kind of a
distracting detail for most users. This just makes the
height 2px smaller for now. This will also make more text
show up on mobile web.
Travis enables different Python versions through virtual environments,
but it seems that there is a little caveat when we try to create Zulip's
virtual environment by referring Travis' virtual environment; Zulip's
virtual environment refers the system Python. We encountered this
behaviour when we tried to run our backend test suite under Python 3.5
in Travis. 'python3 --version' command before activating Zulip's
virtualenv showed 'Python 3.5.3' and after it showed 'Python 3.4.3'.
This happened when we created the virtual environment using
'virtualenv -p python3'.
The solution seems to be to explicitly give the path of the Python
interpreter in the Travis' virtual environment using 'which python3'.
This adds snakeviz to dev tools and also updates the message displayed
upon running `test-backend` with `--profile` option to say how to run
snakeviz correctly when using vagrant development environment.
If we use string concatenation to span i18n strings across multiple
lines then we end with such strings to be translated by the translators:
```
"This is the first line"\n + "This is the second line"
```
We should use variables in i18n strings to give proper context to the
translators. If the pattern is this:
```
i18n.t("Count " + count + " items")
```
Then it will be captured like this:
```
{"Count" + count + "items": ""}
```
Which is not good for the translators.
This comes from, in the dev environment:
./manage.py makemessages -l en -l ja
tx push -s -l ja
tx pull -f -l ja --mode=developer
The makemessages and `tx push` provide Transifex with the updated set
of strings and metadata. I'm not entirely sure why that's necessary,
but without it a lone `tx pull` left the server crashing with numerous
zerver.models.DoesNotExist exceptions.
(So to be precise, there was another `tx pull` at the start, just like
the final one. That shouldn't matter for the result, though.)
