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Open Studio Ruby - Undefined method from openstudio standards

asked 2023-06-22 18:04:01 -0500

MDW's avatar

updated 2023-06-28 07:30:19 -0500

Hi there,

I am getting an undefined method error from the openstudio standards. I have require 'openstudio-standards'at the top of the measure so unclear if I should be importing any other libraries. Any ideas on how I can resolve this?

Error: undefined method `spaces' for "DOAS - Building Story 1":String:/ruby/2.7.0/gems/openstudio-standards-0.3.0/lib/openstudio-standards/standards/Standards.ThermalZone.rb:12:in `thermal_zone_outdoor_airflow_rate':/ruby/2.7.0/gems/openstudio-standards-0.3.0/lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb:1343:in `block in model_add_doas':/ruby/2.7.0/gems/openstudio-standards-0.3.0/lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb:1342:in `each':/ruby/2.7.0/gems/openstudio-standards-0.3.0/lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb:1342:in `model_add_doas':/ruby/2.7.0/gems/openstudio-standards-0.3.0/lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb:6448:in `model_add_hvac_system'

Thank you!

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Does your measure call the openstudio-standards thermal_zone_outdoor_airflow_rate method? If so, it seems like you're passing in the name of the thermal zone as an argument instead of the thermal zone object itself.

shorowit's avatar shorowit  ( 2023-06-22 19:01:51 -0500 )edit

No, the measure does not call the mentioned method. It's possible that a method I'm calling from the openstudio standards calls thermal_zone_outdoor_airflow_rate, but I am unsure.

MDW's avatar MDW  ( 2023-06-23 07:56:45 -0500 )edit

Well the comment still applies that I think you're passing in a thermal zone name instead of a thermal zone object to one of the openstudio standards methods. Maybe the model_add_hvac_system method?

shorowit's avatar shorowit  ( 2023-06-23 08:47:22 -0500 )edit

Ah right, thanks for the pointer. I'm now using the following thermal_zone = model.getThermalZoneByName(thermal_zone_name), but still seeing that undefined error method for now the Optional Thermal Zone object.

Error: undefined method `spaces' for #<OpenStudio::Model::OptionalThermalZone:0x000001caa0521928>
MDW's avatar MDW  ( 2023-06-23 16:25:06 -0500 )edit
3

You need to use thermal_zone = model.getThermalZoneByName(thermal_zone_name).get. Refer to the section "OpenStudio Measures and the boost::optional Type" in the measure writing guide.

shorowit's avatar shorowit  ( 2023-06-23 19:00:40 -0500 )edit

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answered 2023-06-27 08:35:18 -0500

MDW's avatar

The model_add_hvac_systemmethod is called, which requires input thermal zones to be the thermal zone object rather than the name of the thermal zone.

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Asked: 2023-06-22 18:04:01 -0500

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Last updated: Jun 27 '23