Class: Rollup

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/rollup.rb,
lib/rollup/model.rb,
lib/rollup/utils.rb,
lib/rollup/version.rb,
lib/rollup/aggregator.rb

Defined Under Namespace

Modules: Model, Utils Classes: Aggregator

Constant Summary collapse

VERSION =

not used in gemspec to avoid superclass mismatch be sure to update there as well

"0.1.3"

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.time_zone ⇒ Object

do not memoize so Time.zone can change



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# File 'lib/rollup.rb', line 14

def time_zone
  (defined?(@time_zone) && @time_zone) || Time.zone || "Etc/UTC"
end

.week_start ⇒ Object

Returns the value of attribute week_start.



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# File 'lib/rollup.rb', line 7

def week_start
  @week_start
end

Class Method Details

.list ⇒ Object 



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# File 'lib/rollup.rb', line 63

def list
  select(:name, :interval).distinct.order(:name, :interval).map do |r|
    {name: r.name, interval: r.interval}
  end
end

.multi_series(name, interval: "day") ⇒ Object 



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# File 'lib/rollup.rb', line 31

def multi_series(name, interval: "day")
  Utils.check_dimensions

  relation = where(name: name, interval: interval)

  # use select_all to reduce allocations
  sql = relation.order(:time).select(Utils.time_sql(interval), :value, :dimensions).to_sql
  result = connection.select_all(sql).rows

  result.group_by { |r| JSON.parse(r[2]) }.map do |dimensions, rollups|
    {dimensions: dimensions, data: Utils.make_series(rollups, interval)}
  end
end

.rename(old_name, new_name) ⇒ Object

TODO maybe use in_batches



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# File 'lib/rollup.rb', line 70

def rename(old_name, new_name)
  where(name: old_name).update_all(name: new_name)
end

.series(name, interval: "day", dimensions: {}) ⇒ Object 



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# File 'lib/rollup.rb', line 18

def series(name, interval: "day", dimensions: {})
  Utils.check_dimensions if dimensions.any?

  relation = where(name: name, interval: interval)
  relation = relation.where(dimensions: dimensions) if Utils.dimensions_supported?

  # use select_all due to incorrect casting with pluck
  sql = relation.order(:time).select(Utils.time_sql(interval), :value).to_sql
  result = connection.select_all(sql).rows

  Utils.make_series(result, interval)
end

.where_dimensions(dimensions) ⇒ Object 



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# File 'lib/rollup.rb', line 45

def where_dimensions(dimensions)
  Utils.check_dimensions

  relation = self
  dimensions.each do |k, v|
    k = k.to_s
    relation =
      if v.nil?
        relation.where("dimensions ->> ? IS NULL", k)
      elsif v.is_a?(Array)
        relation.where("dimensions ->> ? IN (?)", k, v.map { |vi| vi.as_json.to_s })
      else
        relation.where("dimensions ->> ? = ?", k, v.as_json.to_s)
      end
  end
  relation
end

Instance Method Details

#inspect ⇒ Object

feels cleaner than overriding _read_attribute



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# File 'lib/rollup.rb', line 76

def inspect
  if Utils.date_interval?(interval)
    super.sub(/time: "[^"]+"/, "time: \"#{time.to_s(:db)}\"")
  else
    super
  end
end

#time ⇒ Object 



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# File 'lib/rollup.rb', line 84

def time
  if Utils.date_interval?(interval) && !time_before_type_cast.nil?
    if time_before_type_cast.is_a?(Time)
      time_before_type_cast.utc.to_date
    else
      Date.parse(time_before_type_cast.to_s)
    end
  else
    super
  end
end