[NEP-18619]: Fetching unique filter dataset ids

Author: soundarya-mv

lib/superset/dashboard/datasets/list.rb

@@ -51,7 +51,7 @@ def datasets_details
         private
 
         def filter_dataset_ids
-          @filter_dataset_ids ||= dashboard.filter_configuration.map { |c| c['targets'] }.flatten.compact.map { |c| c['datasetId'] }.flatten.compact
+          @filter_dataset_ids ||= dashboard.filter_configuration.map { |c| c['targets'] }.flatten.compact.map { |c| c['datasetId'] }.flatten.compact.uniq
         end
 
         def filter_datasets(filter_dataset_ids_not_used_in_charts)

lib/superset/services/duplicate_dashboard.rb

@@ -259,7 +259,7 @@ def source_dashboard_dataset_ids
       end
 
       def source_dashboard_filter_dataset_ids
-        @filter_dataset_ids ||= source_dashboard.filter_configuration.map { |c| c['targets'] }.flatten.compact.map { |c| c['datasetId'] }.flatten.compact
+        @filter_dataset_ids ||= source_dashboard.filter_configuration.map { |c| c['targets'] }.flatten.compact.map { |c| c['datasetId'] }.flatten.compact.uniq
       end
 
       # Primary Assumption is that all charts datasets on the source dashboard are pointing to the same database schema