Class: MerryGoRound::Query

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/merry_go_round/query.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils

seconds, window

Constructor Details

#initialize(params = {}) ⇒ Query

Returns a new instance of Query.



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# File 'lib/merry_go_round/query.rb', line 7

def initialize(params = {})
  self.granularity = params[:granularity] || :hour
  self.keys = [params[:keys]].flatten.compact
  parse_max(params)
  parse_min(params)
end

Instance Attribute Details

#granularity ⇒ Object

Returns the value of attribute granularity.



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# File 'lib/merry_go_round/query.rb', line 5

def granularity
  @granularity
end

#keys ⇒ Object

Returns the value of attribute keys.



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# File 'lib/merry_go_round/query.rb', line 5

def keys
  @keys
end

#max ⇒ Object

Returns the value of attribute max.



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# File 'lib/merry_go_round/query.rb', line 5

def max
  @max
end

#min ⇒ Object

Returns the value of attribute min.



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# File 'lib/merry_go_round/query.rb', line 5

def min
  @min
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/merry_go_round/query.rb', line 14

def execute
  query = MerryGoRound::Aggregation
  if keys && keys.length > 0
    query = query.where('key in (?)', keys)
  end
  query = query.where('granularity = ? and timestamp >= ? and timestamp <= ?', granularity, min, max)
  query = query.order('key, timestamp')

  records = query.all
  keys = records.map(&:key).uniq

  results = keys.inject({}) do |out, current_key|
    out[current_key] = records.select{|record| record.key == current_key }.map do |item|
      {
        id: item.id,
        parent_id: item.parent_id,
        timestamp: item.timestamp,
        value: item.value,
        granularity: item.granularity
      }
    end

    out
  end

  {
    results: results,
    query: self.as_json
  }
end