ALTER TABLE site_settings
  ADD COLUMN IF NOT EXISTS home_latest_post_limit INTEGER NOT NULL DEFAULT 20,
  ADD COLUMN IF NOT EXISTS post_list_page_size INTEGER NOT NULL DEFAULT 20,
  ADD COLUMN IF NOT EXISTS tag_post_list_page_size INTEGER NOT NULL DEFAULT 20,
  ADD COLUMN IF NOT EXISTS featured_post_limit INTEGER NOT NULL DEFAULT 6,
  ADD COLUMN IF NOT EXISTS page_section_item_limit INTEGER NOT NULL DEFAULT 12;

ALTER TABLE site_settings
  ADD CONSTRAINT site_settings_home_latest_post_limit_range_check
  CHECK (home_latest_post_limit BETWEEN 1 AND 50)
  NOT VALID;

ALTER TABLE site_settings
  ADD CONSTRAINT site_settings_post_list_page_size_range_check
  CHECK (post_list_page_size BETWEEN 1 AND 50)
  NOT VALID;

ALTER TABLE site_settings
  ADD CONSTRAINT site_settings_tag_post_list_page_size_range_check
  CHECK (tag_post_list_page_size BETWEEN 1 AND 50)
  NOT VALID;

ALTER TABLE site_settings
  ADD CONSTRAINT site_settings_featured_post_limit_range_check
  CHECK (featured_post_limit BETWEEN 1 AND 50)
  NOT VALID;

ALTER TABLE site_settings
  ADD CONSTRAINT site_settings_page_section_item_limit_range_check
  CHECK (page_section_item_limit BETWEEN 1 AND 50)
  NOT VALID;

ALTER TABLE site_settings
  VALIDATE CONSTRAINT site_settings_home_latest_post_limit_range_check;

ALTER TABLE site_settings
  VALIDATE CONSTRAINT site_settings_post_list_page_size_range_check;

ALTER TABLE site_settings
  VALIDATE CONSTRAINT site_settings_tag_post_list_page_size_range_check;

ALTER TABLE site_settings
  VALIDATE CONSTRAINT site_settings_featured_post_limit_range_check;

ALTER TABLE site_settings
  VALIDATE CONSTRAINT site_settings_page_section_item_limit_range_check;