gitlab-org--gitlab-foss/app/models/merge_requests_closing_issues.rb

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# frozen_string_literal: true
class MergeRequestsClosingIssues < ApplicationRecord
Improve performance of the cycle analytics page. 1. These changes bring down page load time for 100 issues from more than a minute to about 1.5 seconds. 2. This entire commit is composed of these types of performance enhancements: - Cache relevant data in `IssueMetrics` wherever possible. - Cache relevant data in `MergeRequestMetrics` wherever possible. - Preload metrics 3. Given these improvements, we now only need to make 4 SQL calls: - Load all issues - Load all merge requests - Load all metrics for the issues - Load all metrics for the merge requests 4. A list of all the data points that are now being pre-calculated: a. The first time an issue is mentioned in a commit - In `GitPushService`, find all issues mentioned by the given commit using `ReferenceExtractor`. Set the `first_mentioned_in_commit_at` flag for each of them. - There seems to be a (pre-existing) bug here - files (and therefore commits) created using the Web CI don't have cross-references created, and issues are not closed even when the commit title is "Fixes #xx". b. The first time a merge request is deployed to production When a `Deployment` is created, find all merge requests that were merged in before the deployment, and set the `first_deployed_to_production_at` flag for each of them. c. The start / end time for a merge request pipeline Hook into the `Pipeline` state machine. When the `status` moves to `running`, find the merge requests whose tip commit matches the pipeline, and record the `latest_build_started_at` time for each of them. When the `status` moves to `success`, record the `latest_build_finished_at` time. d. The merge requests that close an issue - This was a big cause of the performance problems we were having with Cycle Analytics. We need to use `ReferenceExtractor` to make this calculation, which is slow when we have to run it on a large number of merge requests. - When a merge request is created, updated, or refreshed, find the issues it closes, and create an instance of `MergeRequestsClosingIssues`, which acts as a join model between merge requests and issues. - If a `MergeRequestsClosingIssues` instance links a merge request and an issue, that issue closes that merge request. 5. The `Queries` module was changed into a class, so we can cache the results of `issues` and `merge_requests_closing_issues` across various cycle analytics stages. 6. The code added in this commit is untested. Tests will be added in the next commit.
2016-09-15 04:59:36 -04:00
belongs_to :merge_request
belongs_to :issue
validates :merge_request_id, uniqueness: { scope: :issue_id }, presence: true
validates :issue_id, presence: true
scope :with_issues, ->(ids) { where(issue_id: ids) }
scope :with_merge_requests_enabled, -> do
joins(:merge_request)
.joins('INNER JOIN project_features ON merge_requests.target_project_id = project_features.project_id')
.where('project_features.merge_requests_access_level >= :access', access: ProjectFeature::ENABLED)
end
scope :accessible_by, ->(user) do
joins(:merge_request)
.joins('INNER JOIN project_features ON merge_requests.target_project_id = project_features.project_id')
.where('project_features.merge_requests_access_level >= :access OR EXISTS(:authorizations)',
access: ProjectFeature::ENABLED,
authorizations: user.authorizations_for_projects(min_access_level: Gitlab::Access::REPORTER, related_project_column: "merge_requests.target_project_id")
)
end
class << self
def count_for_collection(ids, current_user)
closing_merge_requests(ids, current_user).group(:issue_id).pluck('issue_id', Arel.sql('COUNT(*) as count'))
end
def count_for_issue(id, current_user)
closing_merge_requests(id, current_user).count
end
private
def closing_merge_requests(ids, current_user)
return with_issues(ids) if current_user&.admin?
return with_issues(ids).with_merge_requests_enabled if current_user.blank?
with_issues(ids).accessible_by(current_user)
end
end
Improve performance of the cycle analytics page. 1. These changes bring down page load time for 100 issues from more than a minute to about 1.5 seconds. 2. This entire commit is composed of these types of performance enhancements: - Cache relevant data in `IssueMetrics` wherever possible. - Cache relevant data in `MergeRequestMetrics` wherever possible. - Preload metrics 3. Given these improvements, we now only need to make 4 SQL calls: - Load all issues - Load all merge requests - Load all metrics for the issues - Load all metrics for the merge requests 4. A list of all the data points that are now being pre-calculated: a. The first time an issue is mentioned in a commit - In `GitPushService`, find all issues mentioned by the given commit using `ReferenceExtractor`. Set the `first_mentioned_in_commit_at` flag for each of them. - There seems to be a (pre-existing) bug here - files (and therefore commits) created using the Web CI don't have cross-references created, and issues are not closed even when the commit title is "Fixes #xx". b. The first time a merge request is deployed to production When a `Deployment` is created, find all merge requests that were merged in before the deployment, and set the `first_deployed_to_production_at` flag for each of them. c. The start / end time for a merge request pipeline Hook into the `Pipeline` state machine. When the `status` moves to `running`, find the merge requests whose tip commit matches the pipeline, and record the `latest_build_started_at` time for each of them. When the `status` moves to `success`, record the `latest_build_finished_at` time. d. The merge requests that close an issue - This was a big cause of the performance problems we were having with Cycle Analytics. We need to use `ReferenceExtractor` to make this calculation, which is slow when we have to run it on a large number of merge requests. - When a merge request is created, updated, or refreshed, find the issues it closes, and create an instance of `MergeRequestsClosingIssues`, which acts as a join model between merge requests and issues. - If a `MergeRequestsClosingIssues` instance links a merge request and an issue, that issue closes that merge request. 5. The `Queries` module was changed into a class, so we can cache the results of `issues` and `merge_requests_closing_issues` across various cycle analytics stages. 6. The code added in this commit is untested. Tests will be added in the next commit.
2016-09-15 04:59:36 -04:00
end