Detail > section make read only field when in "Edit and View" page

Summary

How to make read only the Details section for "Full Time or Part Time" field when using USE = Position type in "Edit or View" page

Content

Hi,

My expression builder is not working when on the "Edit and View" page It's not pulling the "Position" value if is not equal to NULL to make this work and IsEditReqeuisition.

#{bindings.PositionId.inputValue ne null and pageFlowScope.SharedContextBean.currentInstance['IsEditRequisition']}