Drop downs using queries for the Labels/Values

You should do the query into a load() variable.  Then when you want to populate the dropdown labels and values, you can refer directly to the pre-queried properties stored in that variable.

Something like:

load(
  local!myValues: rule!queryDevelopers(active: true()),
  
  a!formLayout(
    contents: {
      a!dropdownField(
        label: "Select Developer",
        choiceLabels: local!myValues.developerName,
        choiceValues: local!myValues.developerId,
        value: ri!selectedDeveloperId,
        saveInto: ri!selectedDeveloperId,
        placeholderLabel: "--Select a Developer--"
      )
    }
  )
)

Thank you so much

Putting queries in the load variables with query entities in expression rules will allow you to use the dot notation to pull the values you need to the labels field and values field separately with only one query per database table.