Should filters pushed to the bottom of the query work? #79

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1. jg-rp commented on Feb 11, 2025

   

   jg-rp

   on Feb 11, 2025

   Last edited by jg-rp

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   Hi @NiklasRosenstein,

   I believe this behaviour to be correct, according to RFC 9535, albeit not immediately intuitive.

   If we apply $[*].payload to your example data without the filter, we get a node list containing these values:

   [
     {
       "type": "A"
     },
     {
       "type": "B"
     },
     {
       "type": "C"
     }
   ]

   If we then apply the filter, [?(@.type == "B")], to each of those values in turn, it selects nothing, because filters are applied to object/dict values without referencing their keys/properties.

   Changing the filter to [?(@ == "B")] will give us a single node with the value "B".

   import jsonpath
   
   data = [
       {"payload": {"type": "A"}},
       {"payload": {"type": "B"}},
       {"payload": {"type": "C"}},
   ]
   
   print(jsonpath.findall('$[*].payload[?(@ == "B")]', data))  # ['B']
2. Repository owner locked and limited conversation to collaborators on Aug 3, 2025
3. jg-rp

   converted this issue into a discussion #89 on Aug 3, 2025