This commit introduces the usage of Common Table Expressions (CTEs) to
efficiently retrieve nested group hierarchies, without having to rely on
the "routes" table (which is an _incredibly_ inefficient way of getting
the data). This requires a patch to ActiveRecord (found in the added
initializer) to work properly as ActiveRecord doesn't support WITH
statements properly out of the box.
Unfortunately MySQL provides no efficient way of getting nested groups.
For example, the old routes setup could easily take 5-10 seconds
depending on the amount of "routes" in a database. Providing vastly
different logic for both MySQL and PostgreSQL will negatively impact the
development process. Because of this the various nested groups related
methods return empty relations when used in combination with MySQL.
For project authorizations the logic is split up into two classes:
* Gitlab::ProjectAuthorizations::WithNestedGroups
* Gitlab::ProjectAuthorizations::WithoutNestedGroups
Both classes get the fresh project authorizations (= as they should be
in the "project_authorizations" table), including nested groups if
PostgreSQL is used. The logic of these two classes is quite different
apart from their public interface. This complicates development a bit,
but unfortunately there is no way around this.
This commit also introduces Gitlab::GroupHierarchy. This class can be
used to get the ancestors and descendants of a base relation, or both by
using a UNION. This in turn is used by methods such as:
* Namespace#ancestors
* Namespace#descendants
* User#all_expanded_groups
Again this class relies on CTEs and thus only works on PostgreSQL. The
Namespace methods will return an empty relation when MySQL is used,
while User#all_expanded_groups will return only the groups a user is a
direct member of.
Performance wise the impact is quite large. For example, on GitLab.com
Namespace#descendants used to take around 580 ms to retrieve data for a
particular user. Using CTEs we are able to reduce this down to roughly 1
millisecond, returning the exact same data.
== On The Fly Refreshing
Refreshing of authorizations on the fly (= when
users.authorized_projects_populated was not set) is removed with this
commit. This simplifies the code, and ensures any queries used for
authorizations are not mutated because they are executed in a Rails
scope (e.g. Project.visible_to_user).
This commit includes a migration to schedule refreshing authorizations
for all users, ensuring all of them have their authorizations in place.
Said migration schedules users in batches of 5000, with 5 minutes
between every batch to smear the load around a bit.
== Spec Changes
This commit also introduces some changes to various specs. For example,
some specs for ProjectTeam assumed that creating a personal project
would _not_ lead to the owner having access, which is incorrect. Because
we also no longer refresh authorizations on the fly for new users some
code had to be added to the "empty_project" factory. This chunk of code
ensures that the owner's permissions are refreshed after creating the
project, something that is normally done in Projects::CreateService.
Enables user specification of group name vs. name inferred from group path.
Cause new group form to copy name from path
Adds some new page-specific javascript that copies entry from the
group path field to the group name field when the group name field
is initially empty.
Remove duplicate group name entry field on group edit form
This corrects the duplicated name entry field and tests that the
JavaScript does not update the group name field if the user
edits the group path. (Editing the group path is not recommended
in any case, but it is possible.)
Address eslint errors in group.js
Enable group name copy with dispatch and explore group creation
The dispatch and explore group creation forms require the group.js
asset, and their tests now require testing against poltergeist
Update workflow new group instruction
Update the gitlab basics group creation document
Add a change log entry
Remove unused variable for eslint
* subgroup can be created by owner of the group
* project can be created inside subgroup by owner of the group
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
- gl_emoji for falling back to image/css-sprite when the browser
doesn't support an emoji
- Markdown rendering (Banzai filter)
- Autocomplete
- Award emoji menu
- Perceived perf
- Immediate response because we now build client-side
- Update `digests.json` generation in gemojione rake task to be more
useful and include `unicodeVersion`
MR: !9437
See issues
- #26371
- #27250
- #22474
