🐛 Improving error tolerance of migration

If this migration has already been run, but not properly registered, it
should handle the cases where the index does or does not exist.

This is a kludge to ensure that behavior.  Namely resque any error and
proceed.

I encountered it while jumping between branches in PALS.

db/migrate/20230608153601_add_indices_to_bulkrax.rb

@@ -1,14 +1,44 @@
 class AddIndicesToBulkrax < ActiveRecord::Migration[5.1]
   def change
-    add_index :bulkrax_entries, :identifier
-    add_index :bulkrax_entries, :type
-    add_index :bulkrax_entries, [:importerexporter_id, :importerexporter_type], name: 'bulkrax_entries_importerexporter_idx'
-
-    add_index :bulkrax_pending_relationships, :parent_id
-    add_index :bulkrax_pending_relationships, :child_id
-
-    add_index :bulkrax_statuses, [:statusable_id, :statusable_type], name: 'bulkrax_statuses_statusable_idx'
-    add_index :bulkrax_statuses, [:runnable_id, :runnable_type], name: 'bulkrax_statuses_runnable_idx'
-    add_index :bulkrax_statuses, :error_class
+    begin
+      add_index :bulkrax_entries, :identifier
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_entries, :type
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_entries, [:importerexporter_id, :importerexporter_type], name: 'bulkrax_entries_importerexporter_idx'
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_pending_relationships, :parent_id
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_pending_relationships, :child_id
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_statuses, [:statusable_id, :statusable_type], name: 'bulkrax_statuses_statusable_idx'
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_statuses, [:runnable_id, :runnable_type], name: 'bulkrax_statuses_runnable_idx'
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
+    begin
+      add_index :bulkrax_statuses, :error_class
+    rescue => e
+      Rails.logger.info("Encountered #{e}; moving on.")
+    end
   end
 end