gitlab-org--gitlab-foss/app/finders
Yorick Peterse 237c8f66e6
Precalculate trending projects
This commit introduces a Sidekiq worker that precalculates the list of
trending projects on a daily basis. The resulting set is stored in a
database table that is then queried by Project.trending.

This setup means that Unicorn workers no longer _may_ have to calculate
the list of trending projects. Furthermore it supports filtering without
any complex caching mechanisms.

The data in the "trending_projects" table is inserted in the same order
as the project ranking. This means that getting the projects in the
correct order is simply a matter of:

    SELECT projects.*
    FROM projects
    INNER JOIN trending_projects ON trending_projects.project_id = projects.id
    ORDER BY trending_projects.id ASC;

Such a query will only take a few milliseconds at most (as measured on
GitLab.com), opposed to a few seconds for the query used for calculating
the project ranks.

The migration in this commit does not require downtime and takes care of
populating an initial list of trending projects.
2016-10-10 12:27:08 +02:00
..
access_requests_finder.rb Use Ability.allowed? instead of current_user.can? in AccessRequestsFinder 2016-09-28 08:46:59 +02:00
branches_finder.rb implements the basic filter functionality 2016-07-19 19:30:10 +01:00
contributed_projects_finder.rb Tweaks, refactoring, and specs 2016-03-20 21:04:07 +01:00
group_projects_finder.rb Fix groups API to list only user's accessible projects 2016-05-24 18:14:12 -07:00
groups_finder.rb Tweaks, refactoring, and specs 2016-03-20 21:04:07 +01:00
issuable_finder.rb Take filters in account in issuable counters 2016-09-30 12:02:54 +02:00
issues_finder.rb fix issues mr counter 2016-09-20 14:39:15 +01:00
joined_groups_finder.rb Address feedback 2016-03-22 00:09:20 +01:00
merge_requests_finder.rb fix issues mr counter 2016-09-20 14:39:15 +01:00
milestones_finder.rb sort milestones by due_date 2015-12-03 08:53:34 -06:00
move_to_project_finder.rb Move to project dropdown with infinite scroll for better performance 2016-08-18 15:31:51 +02:00
notes_finder.rb Fix notes on confidential issues through JSON to users without access 2016-06-14 17:51:17 -03:00
personal_projects_finder.rb Tweaks, refactoring, and specs 2016-03-20 21:04:07 +01:00
pipelines_finder.rb Use PipelinesFinder in Pipelines API 2016-09-07 15:38:03 +02:00
projects_finder.rb Pass project IDs relation to ProjectsFinder instead of using a block 2016-08-15 12:49:31 +02:00
README.md Set milestone on new issue when creating issue from index with milestone filter active. 2015-05-27 14:22:11 +02:00
snippets_finder.rb Project members with guest role can't access confidential issues 2016-06-13 19:32:00 -03:00
tags_finder.rb add specs for tags finder 2016-08-31 19:16:47 +01:00
todos_finder.rb remove Ability.abilities 2016-08-30 11:35:06 -07:00
union_finder.rb Tweaks, refactoring, and specs 2016-03-20 21:04:07 +01:00

Finders

This type of classes responsible for collection items based on different conditions. To prevent lookup methods in models like this:

class Project
  def issues_for_user_filtered_by(user, filter)
    # A lot of logic not related to project model itself
  end
end

issues = project.issues_for_user_filtered_by(user, params)

Better use this:

issues = IssuesFinder.new(project, user, filter).execute

It will help keep models thiner.