chore: added trigram migration for fuzzy search

priv/repo/migrations/20251001141005_add_trigram_to_members.exs

@@ -0,0 +1,66 @@
+defmodule Mv.Repo.Migrations.AddTrigramToMembers do
+  @moduledoc """
+  Updates resources based on their most recent snapshots.
+
+  This file was autogenerated with `mix ash_postgres.generate_migrations`
+  """
+
+  use Ecto.Migration
+
+  def up do
+    # activate trigram-extension
+    execute("CREATE EXTENSION IF NOT EXISTS pg_trgm;")
+
+    # -------------------------------------------------
+    # Trigram‑Indizes (GIN) for fields we want to search in
+    # -------------------------------------------------
+    #
+    #   `gin_trgm_ops` ist the operator-class-name
+    #
+
+    execute("""
+      CREATE INDEX members_first_name_trgm_idx
+      ON members
+      USING GIN (first_name gin_trgm_ops);
+    """)
+
+    execute("""
+      CREATE INDEX members_last_name_trgm_idx
+      ON members
+      USING GIN (last_name gin_trgm_ops);
+    """)
+
+    execute("""
+      CREATE INDEX members_email_trgm_idx
+      ON members
+      USING GIN (email gin_trgm_ops);
+    """)
+
+    execute("""
+      CREATE INDEX members_city_trgm_idx
+      ON members
+      USING GIN (city gin_trgm_ops);
+    """)
+
+    execute("""
+      CREATE INDEX members_street_trgm_idx
+      ON members
+      USING GIN (street gin_trgm_ops);
+    """)
+
+    execute("""
+      CREATE INDEX members_notes_trgm_idx
+      ON members
+      USING GIN (notes gin_trgm_ops);
+    """)
+  end
+
+  def down do
+    execute("DROP INDEX IF EXISTS members_first_name_trgm_idx;")
+    execute("DROP INDEX IF EXISTS members_last_name_trgm_idx;")
+    execute("DROP INDEX IF EXISTS members_email_trgm_idx;")
+    execute("DROP INDEX IF EXISTS members_city_trgm_idx;")
+    execute("DROP INDEX IF EXISTS members_street_trgm_idx;")
+    execute("DROP INDEX IF EXISTS members_notes_trgm_idx;")
+  end
+end