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Introduce new patterns for direct sql that are safe and fast. MiniSql is not prone to memory bloat that can happen with direct PG usage. It also has an extremely fast materializer and very a convenient API - DB.exec(sql, *params) => runs sql returns row count - DB.query(sql, *params) => runs sql returns usable objects (not a hash) - DB.query_hash(sql, *params) => runs sql returns an array of hashes - DB.query_single(sql, *params) => runs sql and returns a flat one dimensional array - DB.build(sql) => returns a sql builder See more at: https://github.com/discourse/mini_sql
75 lines
2.5 KiB
Ruby
75 lines
2.5 KiB
Ruby
class UserVisit < ActiveRecord::Base
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def self.counts_by_day_query(start_date, end_date, group_id = nil)
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result = where('visited_at >= ? and visited_at <= ?', start_date.to_date, end_date.to_date)
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if group_id
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result = result.joins("INNER JOIN users ON users.id = user_visits.user_id")
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result = result.joins("INNER JOIN group_users ON group_users.user_id = users.id")
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result = result.where("group_users.group_id = ?", group_id)
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end
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result.group(:visited_at).order(:visited_at)
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end
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def self.count_by_active_users(start_date, end_date)
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sql = <<~SQL
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WITH dau AS (
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SELECT date_trunc('day', user_visits.visited_at)::DATE AS date,
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count(distinct user_visits.user_id) AS dau
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FROM user_visits
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WHERE user_visits.visited_at::DATE >= :start_date::DATE AND user_visits.visited_at <= :end_date::DATE
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GROUP BY date_trunc('day', user_visits.visited_at)::DATE
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ORDER BY date_trunc('day', user_visits.visited_at)::DATE
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)
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SELECT date, dau,
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(SELECT count(distinct user_visits.user_id)
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FROM user_visits
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WHERE user_visits.visited_at::DATE BETWEEN dau.date - 29 AND dau.date
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) AS mau
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FROM dau
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SQL
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DB.query_hash(sql, start_date: start_date, end_date: end_date)
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end
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# A count of visits in a date range by day
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def self.by_day(start_date, end_date, group_id = nil)
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counts_by_day_query(start_date, end_date, group_id).count
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end
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def self.mobile_by_day(start_date, end_date, group_id = nil)
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counts_by_day_query(start_date, end_date, group_id).where(mobile: true).count
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end
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def self.ensure_consistency!
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DB.exec <<~SQL
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UPDATE user_stats u set days_visited =
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(
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SELECT COUNT(*) FROM user_visits v WHERE v.user_id = u.user_id
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)
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WHERE days_visited <>
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(
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SELECT COUNT(*) FROM user_visits v WHERE v.user_id = u.user_id
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)
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SQL
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end
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end
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# == Schema Information
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#
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# Table name: user_visits
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#
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# id :integer not null, primary key
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# user_id :integer not null
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# visited_at :date not null
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# posts_read :integer default(0)
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# mobile :boolean default(FALSE)
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# time_read :integer default(0), not null
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#
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# Indexes
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#
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# index_user_visits_on_user_id_and_visited_at (user_id,visited_at) UNIQUE
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# index_user_visits_on_user_id_and_visited_at_and_time_read (user_id,visited_at,time_read)
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# index_user_visits_on_visited_at_and_mobile (visited_at,mobile)
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#
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