Bugfix: indenting aggregate filters

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## [Unreleased]
 
+- Fix bug with aggregate filter where clause
+
 ## [0.6.0] - 2025-08-21
 
 - Add preprocessors config that allows applying text transforms to the input before parsing

lib/activerecord-pg-format-db-structure/indenter.rb

@@ -125,6 +125,8 @@ def indent
           output.append_token
           output.pop_scope
           output.append_scope(type:, indent: 0)
+        in { current_token: WHERE, inside: PARENS }
+          output.append_token
         in {
           current_token: FROM | WHERE | GROUP | ORDER | WINDOW | HAVING | LIMIT | OFFSET | FETCH | FOR | UNION |
             INTERSECT | EXCEPT => token_type

spec/activerecord-pg-format-db-structure/formatter_spec.rb

@@ -263,5 +263,21 @@
         );
       SQL
     end
+
+    it "handles filter where clauses" do
+      formatter = described_class.new
+
+      source = +<<~SQL
+        select range_agg(my_range) filter (where true),
+               range_agg(my_range) filter (where false)
+        from my_table
+      SQL
+
+      expect(formatter.format(source)).to eq(<<~SQL)
+        SELECT range_agg(my_range) FILTER (WHERE true),
+               range_agg(my_range) FILTER (WHERE false)
+        FROM my_table;
+      SQL
+    end
   end
 end