add search index

Author: zcesur

priv/repo/migrations/20251003151923_add_linkedin_meta_text_index.exs

@@ -0,0 +1,17 @@
+defmodule Algora.Repo.Migrations.AddLinkedinMetaTextIndex do
+  use Ecto.Migration
+
+  def up do
+    execute "CREATE EXTENSION IF NOT EXISTS pg_trgm"
+    # Drop old index that only covered 'experience' field
+    execute "DROP INDEX IF EXISTS users_lower_idx"
+    # Create new index covering entire linkedin_meta JSON
+    execute "CREATE INDEX users_linkedin_meta_text_idx ON users USING gin(lower(linkedin_meta::text) gin_trgm_ops)"
+  end
+
+  def down do
+    execute "DROP INDEX IF EXISTS users_linkedin_meta_text_idx"
+    # Recreate old index
+    execute "CREATE INDEX users_lower_idx ON users USING gin(lower(linkedin_meta ->> 'experience') gin_trgm_ops) WHERE linkedin_meta ->> 'experience' IS NOT NULL"
+  end
+end