How to check for presence of 'key' in jq before iterating over the values

Question

I get Cannot iterate over null (null) from the below query because .property_history is not present in result object.

How do i che

Answer 1

You could use the ? post-fix operator:

$ jq '.result 
  | .property_history? 
  | .[]
  | select(.event_name == "Sold") 
  | .date'
"08/30/2004"