cubicweb #4005518 ejsonexport view should be selectable with an empty rset [validation pending]

say I'm writing a script talking to a cubicweb instance. say i want to execute some rql. which might or might not select any entities. i want to get a reasonable answer whether or not there are any results, i.e. ejsonexport view should return an empty list if the query returned an empty rset.

prioritynormal
typebug
done in3.20.0
load1.000
load left0.000
closed by#b68088082280 [web/json] an empty rset is just fine for ejsonexport
patch[web/json] an empty rset is just fine for ejsonexport [applied]