This allows us to traverse a list backwards, cycling to the
bottom as needed.
This code is going to be used for the "A" key that cycles
upward in the stream sidebar. It's probably overkill for
that use case, but it does give us O(1) behavior and avoids
the pitfall of accidentally mutating a list when reversing it.
Previously, the Zulip webapp would throw an exception if you used a
character like "+" in your search query, since we were using regular
expressions, when really we should have been just searching for
characters.
We now call the create_large_migrations management command as part of
upgrade-zulip-stage-2 if needed, so that we can create large indexes
while the app is still up.
This management command creates the same indexes as migrations
82, 83, and 95, which are all indexes on the huge UserMessage
table. (*)
This command quickly no-ops with clear messaging when the
indexes already exist, so it's idempotent in that regard. (If
somebody somehow creates an index by the same name incorrectly,
they can always drop it in dbshell and re-run this command.)
If any of the migrations have not been run, which we detect simply
by the existence of the indexes, then we create them using a
`CREATE INDEX CONCURRENTLY` command. This functionality in
postgres allows you to create indexes against large tables
without disrupting queries against those tables. The tradeoff
here is that creating indexes concurrently takes significantly
longer than doing them non-concurrently.
Since most tables are small, we typically just use regular
Django migrations and run them during a brief interval while
the app is down.
For indexes on big tables, we will want to run this command
as part of the upgrade process, and we will want to run
it while the app is still up, otherwise it's pointless.
All the code in create_indexes() is literally copy/pasted
from the relevant migrations, and that scheme should work
going forward. (It uses a different implementation of
create_index_if_not_exist than the migrations use, but the
code is identical lexically in the function.)
If we ever do major restructuring of our large tables, such
as UserMessage, and we end up droppping some of these indexes,
then we will need to make this command migrations-aware. For
now it's safe to assume that indexes are generally additive in
nature, and the sooner we create them during the upgrade process,
the better.
(*) UserMessage is huge for large installations, of course.
Before this change, server searches for both
`is:mentioned` and `is:alerted` would return all messages
where the user is specifically mentioned (but not
at-all mentions).
Now we follow the JS semantics:
is:mentioned -- all mentions, including wildcards
is:alerted -- has an alert word
Here is one relevant JS snippet:
} else if (operand === 'mentioned') {
return message.mentioned;
} else if (operand === 'alerted') {
return message.alerted;
And here you see that `mentioned` is OR'ed over both mention flags:
message.mentioned = convert_flag('mentioned') || convert_flag('wildcard_mentioned');
The `alerted` flag on the JS side is a simple mapping:
message.alerted = convert_flag('has_alert_word');
Fixes#5020
Given typeahed and the fact that this only worked if the person had a
full name that didn't contain whitespace, this side effect of the
original @shortname mentionfeature that we removed was experienced by
users as a bug.
Fixes#6142.
This is necessary for tests the to pass with the new config_error code
path, which we don't want to trigger except on specific tests for
those features.
Use perfectScrollbar on settings sidebar, since the default scrollbar
makes settings menu break when not enough vertical space available.
Add perfectScrollbar to main settings section, and reset the scrollbar
position when switching between tabs.
Also delete the z-index on `.settings-list` since it makes the
perfectScrollbar covered.
Fixes#5216.
We apparently were using the default of num_before=1, not
num_before=0, which meant that if the very last randomly generated
message was one by cordelia mentioning lunch,
test_get_messages_with_search would fail because there were actually 3
matches.
We can't fully support it until we fix the tsearch_extras availability
issue, but for now, this is an improvement.
Tweaked by tabbott to cover the outstanding tsearch_extras issue.
Steve Howell
Tim Abbott
Vaida Plankyte
Rafid Aslam
Umair Khan
Robert Hönig
Aditya Bansal
Anirudh Jain