Drupal exposed filter not displaying children -

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please refer image image-1

when select child category shows "searchfilter?field_category_tid=5"

image-2

but when select parent shows nothing "searchfilter?field_category_tid=4"

image-3

i know can solved creating contextual filters or sort of relationship setting. have no idea how it.

try using grouped filters. when configuring field in filter type expose chose grouped filters configure field

then can enter parent name , children filtered. can enter child name , 1 field (the child ) filtered.

like this


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