Do not add filters with blank values

app/controllers/new_gestionnaire/procedures_controller.rb

@@ -144,6 +144,7 @@ module NewGestionnaire
     end
 
     def add_filter
+      if params[:value].present?
         filters = procedure_presentation.filters
         table, column = params[:field].split('/')
         label = procedure.fields.find { |c| c['table'] == table && c['column'] == column }['label']
@@ -156,6 +157,7 @@ module NewGestionnaire
         }
 
         procedure_presentation.update_attributes(filters: filters.to_json)
+      end
 
       redirect_back(fallback_location: procedure_url(procedure))
     end