設定画面 (#34) (#397)

Reviewed-on: #397
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

backend/app/models/user_theme_slot.rb

@@ -0,0 +1,27 @@
+class UserThemeSlot < ApplicationRecord
+  BASE_THEMES = ['light', 'dark'].freeze
+  SLOT_NOS = [1, 2, 3].freeze
+
+  belongs_to :user
+
+  validates :user_id, presence: true
+  validates :base_theme, presence: true, inclusion: { in: BASE_THEMES }
+  validates :slot_no, presence: true, inclusion: { in: SLOT_NOS }
+  validates :tokens, presence: true
+  validates :user_id, uniqueness: { scope: [:base_theme, :slot_no] }
+
+  validate :tokens_must_be_object
+
+  def serializable_hash(options = nil)
+    hash = { only: [:base_theme, :slot_no, :tokens, :created_at, :updated_at] }
+    super(hash.merge(options || {}))
+  end
+
+  private
+
+  def tokens_must_be_object
+    return if tokens.is_a?(Hash)
+
+    errors.add(:tokens, 'は JSON object で指定してください．')
+  end
+end