Class: Redtastic::Model

Inherits:
Object
  • Object
show all
Defined in:
lib/redtastic/model.rb

Class Method Summary collapse

Class Method Details

.aggregate(params) ⇒ Object 



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# File 'lib/redtastic/model.rb', line 77

def aggregate(params)
  key_data  = fill_keys_and_dates(params)
  keys      = key_data[0]

  # If interval is present, we return a hash including the total as well as a data point for each interval.
  # Example: Visits.aggregate(start_date: 2014-01-05, end_date: 2013-01-06, id: 1, interval: :days)
  # {
  #    visits: 2
  #    days: [
  #      {
  #        created_at: 2014-01-05,
  #        visits: 1
  #      },
  #      {
  #        created_at: 2014-01-06,
  #        visits: 1
  #      }
  #    ]
  # }
  if params[:interval].present? && @_resolution.present?
    if @_type == :unique
      argv = []
      argv << key_data[1].shift # Only need the # of business ids (which is 1st element) from key_data[1]
      argv << temp_key
      if params[:attributes].present?
        attributes = param_to_array(params[:attributes])
        attributes.each do |attribute|
          keys << attribute_key(attribute)
          argv << 1
        end
      end
      data_points = Redtastic::ScriptManager.union_data_points_for_keys(keys, argv)
    else
      data_points = Redtastic::ScriptManager.data_points_for_keys(keys, key_data[1])
    end

    result = HashWithIndifferentAccess.new
    dates  = key_data[2]
    # The data_points_for_keys lua script returns an array of all the data points, with one exception:
    # the value at index 0 is the total across all the data points, so we pop it off of the data points array.
    result[model_name]         = data_points.shift
    result[params[:interval]]  = []

    data_points.each_with_index do |data_point, index|
      point_hash                 = HashWithIndifferentAccess.new
      point_hash[model_name]     = data_point
      point_hash[:date]          = dates[index]
      result[params[:interval]]  << point_hash
    end
    result
  else
    # If interval is not present, we just return the total as an integer
    if @_type == :unique
      argv = []
      argv << temp_key
      if params[:attributes].present?
        attributes = param_to_array(params[:attributes])
        attributes.each do |attribute|
          keys << attribute_key(attribute)
          argv << 1
        end
      end
      Redtastic::ScriptManager.msunion(keys, argv)
    else
      key_data[1].shift # Remove the number of ids from the argv array (don't need it in the sum method)
      Redtastic::ScriptManager.sum(keys, key_data[1]).to_i
    end
  end
end

.decrement(params) ⇒ Object 



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# File 'lib/redtastic/model.rb', line 22

def decrement(params)
  key_data = fill_keys_for_update(params)
  if @_type == :unique
    argv = []
    argv << params[:unique_id]
    Redtastic::ScriptManager.msrem(key_data[0], argv)
  else
    if params[:by].present?
      decrement_by = params[:by]
    else
      decrement_by = 1
    end
    Redtastic::ScriptManager.hmincrby(key_data[0], key_data[1].unshift(-1*decrement_by))
  end
end

.find(params) ⇒ Object

Retrieving



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# File 'lib/redtastic/model.rb', line 40

def find(params)
  keys = []
  argv = []

  # Construct the key's timestamp from inputed date parameters
  timestamp = ''
  timestamp += "#{params[:year]}"
  timestamp += "-#{zeros(params[:month])}" if params[:month].present?
  timestamp += "-W#{params[:week]}"        if params[:week].present?
  timestamp += "-#{zeros(params[:day])}"   if params[:day].present?
  params.merge!(timestamp: timestamp)

  # Handle multiple ids
  ids = param_to_array(params[:id])

  ids.each do |id|
    params[:id] = id
    keys << key(params)
    argv << index(id)
  end

  if @_type == :unique
    unique_argv = []
    unique_argv << params[:unique_id]
    result = Redtastic::ScriptManager.msismember(keys, unique_argv)
  else
    result = Redtastic::ScriptManager.hmfind(keys, argv)
  end

  # If only for a single id, just return the value rather than an array
  if result.size == 1
    result[0]
  else
    result
  end
end

.increment(params) ⇒ Object

Recording



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# File 'lib/redtastic/model.rb', line 6

def increment(params)
  key_data = fill_keys_for_update(params)
  if @_type == :unique
    argv = []
    argv << params[:unique_id]
    Redtastic::ScriptManager.msadd(key_data[0], argv)
  else
    if params[:by].present?
      increment_by = params[:by]
    else
      increment_by = 1
    end
    Redtastic::ScriptManager.hmincrby(key_data[0], key_data[1].unshift(increment_by))
  end
end