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class CycleAnalytics
include Gitlab::Database::Median
include Gitlab::Database::DateTime
DEPLOYMENT_METRIC_STAGES = %i[production staging]
def initialize(project, from:)
@project = project
@from = from
end
def summary
@summary ||= Summary.new(@project, from: @from)
end
def issue
calculate_metric(:issue,
Issue.arel_table[:created_at],
[Issue::Metrics.arel_table[:first_associated_with_milestone_at],
Issue::Metrics.arel_table[:first_added_to_board_at]])
end
def plan
calculate_metric(:plan,
[Issue::Metrics.arel_table[:first_associated_with_milestone_at],
Issue::Metrics.arel_table[:first_added_to_board_at]],
Issue::Metrics.arel_table[:first_mentioned_in_commit_at])
end
def code
calculate_metric(:code,
Issue::Metrics.arel_table[:first_mentioned_in_commit_at],
MergeRequest.arel_table[:created_at])
end
def test
calculate_metric(:test,
MergeRequest::Metrics.arel_table[:latest_build_started_at],
MergeRequest::Metrics.arel_table[:latest_build_finished_at])
end
def review
calculate_metric(:review,
MergeRequest.arel_table[:created_at],
MergeRequest::Metrics.arel_table[:merged_at])
end
def staging
calculate_metric(:staging,
MergeRequest::Metrics.arel_table[:merged_at],
MergeRequest::Metrics.arel_table[:first_deployed_to_production_at])
end
def production
calculate_metric(:production,
Issue.arel_table[:created_at],
MergeRequest::Metrics.arel_table[:first_deployed_to_production_at])
end
private
def calculate_metric(name, start_time_attrs, end_time_attrs)
cte_table = Arel::Table.new("cte_table_for_#{name}")
# Build a `SELECT` query. We find the first of the `end_time_attrs` that isn't `NULL` (call this end_time).
# Next, we find the first of the start_time_attrs that isn't `NULL` (call this start_time).
# We compute the (end_time - start_time) interval, and give it an alias based on the current
# cycle analytics stage.
interval_query = Arel::Nodes::As.new(
cte_table,
subtract_datetimes(base_query_for(name), end_time_attrs, start_time_attrs, name.to_s))
median_datetime(cte_table, interval_query, name)
end
# Join table with a row for every <issue,merge_request> pair (where the merge request
# closes the given issue) with issue and merge request metrics included. The metrics
# are loaded with an inner join, so issues / merge requests without metrics are
# automatically excluded.
def base_query_for(name)
arel_table = MergeRequestsClosingIssues.arel_table
# Load issues
query = arel_table.join(Issue.arel_table).on(Issue.arel_table[:id].eq(arel_table[:issue_id])).
join(Issue::Metrics.arel_table).on(Issue.arel_table[:id].eq(Issue::Metrics.arel_table[:issue_id])).
where(Issue.arel_table[:project_id].eq(@project.id)).
where(Issue.arel_table[:deleted_at].eq(nil)).
where(Issue.arel_table[:created_at].gteq(@from))
# Load merge_requests
query = query.join(MergeRequest.arel_table, Arel::Nodes::OuterJoin).
on(MergeRequest.arel_table[:id].eq(arel_table[:merge_request_id])).
join(MergeRequest::Metrics.arel_table).
on(MergeRequest.arel_table[:id].eq(MergeRequest::Metrics.arel_table[:merge_request_id]))
if DEPLOYMENT_METRIC_STAGES.include?(name)
# Limit to merge requests that have been deployed to production after `@from`
query.where(MergeRequest::Metrics.arel_table[:first_deployed_to_production_at].gteq(@from))
end
query
end
end
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