2018-11-18 11:00:15 +05:30
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# frozen_string_literal: true
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2019-05-18 00:54:41 +05:30
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class TrendingProject < ApplicationRecord
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2016-11-03 12:29:30 +05:30
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belongs_to :project
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# The number of months to include in the trending calculation.
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MONTHS_TO_INCLUDE = 1
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# The maximum number of projects to include in the trending set.
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PROJECTS_LIMIT = 100
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# Populates the trending projects table with the current list of trending
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# projects.
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def self.refresh!
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# The calculation **must** run in a transaction. If the removal of data and
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# insertion of new data were to run separately a user might end up with an
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# empty list of trending projects for a short period of time.
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transaction do
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delete_all
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timestamp = connection.quote(MONTHS_TO_INCLUDE.months.ago)
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connection.execute <<-EOF.strip_heredoc
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INSERT INTO #{table_name} (project_id)
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SELECT project_id
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FROM notes
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INNER JOIN projects ON projects.id = notes.project_id
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WHERE notes.created_at >= #{timestamp}
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AND notes.system IS FALSE
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AND projects.visibility_level = #{Gitlab::VisibilityLevel::PUBLIC}
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GROUP BY project_id
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ORDER BY count(*) DESC
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LIMIT #{PROJECTS_LIMIT};
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EOF
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end
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end
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end
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