-- +goose Up
ALTER TABLE users
  ADD COLUMN image_attachment_id BINARY(16) NULL,
  ADD KEY idx_users_image_attachment_id (image_attachment_id),
  ADD CONSTRAINT fk_users_image_attachment
    FOREIGN KEY (image_attachment_id) REFERENCES attachments(id)
    ON UPDATE CASCADE
    ON DELETE SET NULL;

-- +goose Down
ALTER TABLE users
  DROP FOREIGN KEY fk_users_image_attachment,
  DROP KEY idx_users_image_attachment_id,
  DROP COLUMN image_attachment_id;