gistfile1.rb

smt = StrainMeasurementTask.last
all_delta_r = smt.mydx_analyzing_events.collect do |mde| 
  raw_delta_r = mde.sample_raw_data.collect do |srd|
    srd.delta_r_calculations
  end.flatten

  calibrated_delta_r = mde.sample_calibrated_data.collect do |scd|
    scd.delta_r_calculations
  end.flatten
  
  raw_delta_r + calibrated_delta_r
end.flatten

# For specific scheme
delta_r_calculation_scheme = DeltaRCalculationScheme.first
smt = StrainMeasurementTask.last
all_delta_r = smt.mydx_analyzing_events.collect do |mde| 
  raw_delta_r = mde.sample_raw_data.collect do |srd|
    srd.delta_r_calculations.where(delta_r_calculation_scheme: delta_r_calculation_scheme)
  end.flatten

  calibrated_delta_r = mde.sample_calibrated_data.collect do |scd|
    scd.delta_r_calculations.where(delta_r_calculation_scheme: delta_r_calculation_scheme)
  end.flatten
  
  raw_delta_r + calibrated_delta_r
end.flatten