DEV: resolve Rails/ReversibleMigrationMethodDefinition errors (#636)

db/migrate/20200409102639_drop_incorrect_future_schema_migrations.rb

@@ -9,4 +9,8 @@ def up
       DELETE FROM schema_migration_details WHERE version = '20201303000002';
     SQL
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end

db/migrate/20200409120815_rename_topic_custom_field_topic_post_event_starts_at_index.rb

@@ -10,4 +10,8 @@ def up
               unique: true,
               where: "name = '#{DiscoursePostEvent::TOPIC_POST_EVENT_STARTS_AT}'"
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end

db/migrate/20200409181607_remove_display_invitees.rb

@@ -4,4 +4,8 @@ class RemoveDisplayInvitees < ActiveRecord::Migration[6.0]
   def up
     remove_column :discourse_post_event_events, :display_invitees
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end

db/migrate/20200926144256_add_unique_index_to_topic_event_ends_at_custom_field.rb

@@ -8,4 +8,8 @@ def up
               unique: true,
               where: "name = '#{DiscoursePostEvent::TOPIC_POST_EVENT_ENDS_AT}'"
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end

db/migrate/20220724130519_fix_post_event_timezones.rb

@@ -30,4 +30,8 @@ def up
       AND topic_custom_fields.name IN ('TopicEventStartsAt', 'TopicEventEndsAt')
     SQL
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end