Dynamic/computed keys in JMESPath?
Problem
- How to construct a Jmespath query that returns objects with arbitrary key-value pairs
- The keys need to be dynamic, based on the output of a jmespath filter expression
Workaround
- As of this writing (2019-03-22), dynamic keys are not available in standard Jmespath
- However, it is possible to return a list of lists instead of a list of objects, and simply post-process that list of lists outside of jmespath
Example
[*].[@.name,@.age]Returns
[['foo', 43], ['bar', 55]]Which can then be post-processed outside of Jmespath, if that is an option for you.
See also
To get this result precisely: { foo: 43, bar: 55 } , you should use this query:
@.{foo: @[0].age, bar: @[1].age}
But as you can see I don't retrieve the keys foo and bar dynamically because I can't do it in JMES Path