gitlab-org--gitlab-foss/app/services/merge_requests/create_service.rb
Yorick Peterse 6ec53f5d48
Cache the number of open issues and merge requests
Every project page displays a navigation menu that in turn displays the
number of open issues and merge requests. This means that for every
project page we run two COUNT(*) queries, each taking up roughly 30
milliseconds on GitLab.com. By caching these numbers and refreshing them
whenever necessary we can reduce loading times of all these pages by up
to roughly 60 milliseconds.

The number of open issues does not include confidential issues. This is
a trade-off to keep the code simple and to ensure refreshing the data
only needs 2 COUNT(*) queries instead of 3. A downside is that if a
project only has 5 confidential issues the counter will be set to 0.

Because we now have 3 similar counting service classes the code
previously used in Projects::ForksCountService has mostly been moved to
Projects::CountService, which in turn is reused by the various service
classes.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36622
2017-08-23 13:42:29 +02:00

53 lines
1.8 KiB
Ruby

module MergeRequests
class CreateService < MergeRequests::BaseService
def execute
# @project is used to determine whether the user can set the merge request's
# assignee, milestone and labels. Whether they can depends on their
# permissions on the target project.
source_project = @project
@project = Project.find(params[:target_project_id]) if params[:target_project_id]
merge_request = MergeRequest.new
merge_request.target_project = @project
merge_request.source_project = source_project
merge_request.source_branch = params[:source_branch]
merge_request.merge_params['force_remove_source_branch'] = params.delete(:force_remove_source_branch)
create(merge_request)
end
def before_create(merge_request)
# current_user (defined in BaseService) is not available within run_after_commit block
user = current_user
merge_request.run_after_commit do
NewMergeRequestWorker.perform_async(merge_request.id, user.id)
end
end
def after_create(issuable)
todo_service.new_merge_request(issuable, current_user)
issuable.cache_merge_request_closes_issues!(current_user)
update_merge_requests_head_pipeline(issuable)
super
end
private
def update_merge_requests_head_pipeline(merge_request)
pipeline = head_pipeline_for(merge_request)
merge_request.update(head_pipeline_id: pipeline.id) if pipeline
end
def head_pipeline_for(merge_request)
return unless merge_request.source_project
sha = merge_request.source_branch_sha
return unless sha
pipelines = merge_request.source_project.pipelines.where(ref: merge_request.source_branch, sha: sha)
pipelines.order(id: :desc).first
end
end
end