validates :display_name, :if => proc { |u| u.display_name_changed? },
:characters => { :url_safe => true },
:whitespace => { :leading => false, :trailing => false }
+ validate :display_name_cannot_be_user_id_with_other_id, :if => proc { |u| u.display_name_changed? }
validates :email, :presence => true, :confirmation => true, :characters => true
validates :email, :if => proc { |u| u.email_changed? },
:uniqueness => { :case_sensitive => false }
before_save :update_tile
after_save :spam_check
+ def display_name_cannot_be_user_id_with_other_id
+ display_name&.match(/^user_(\d+)$/i) do |m|
+ errors.add :display_name, I18n.t("activerecord.errors.messages.display_name_is_user_n") unless m[1].to_i == id
+ end
+ end
+
def to_param
display_name
end
end
end
+ def test_display_name_user_id_new
+ existing_user = create(:user)
+ user = build(:user)
+
+ user.display_name = "user_#{existing_user.id}"
+ assert_not user.valid?, "user_<id> name is valid for existing user id when it shouldn't be"
+
+ user.display_name = "user_#{existing_user.id + 1}"
+ assert_not user.valid?, "user_<id> name is valid for new user id when it shouldn't be"
+ end
+
+ def test_display_name_user_id_rename
+ existing_user = create(:user)
+ user = create(:user)
+
+ user.display_name = "user_#{existing_user.id}"
+ assert_not user.valid?, "user_<id> name is valid for existing user id when it shouldn't be"
+
+ user.display_name = "user_#{user.id}"
+ assert_predicate user, :valid?, "user_<id> name is invalid for own id, when it should be"
+ end
+
+ def test_display_name_user_id_unchanged_is_valid
+ user = build(:user, :display_name => "user_0")
+ user.save(:validate => false)
+ user.reload
+
+ assert_predicate user, :valid?, "user_0 display_name is invalid but it hasn't been changed"
+ end
+
def test_friends_with
alice = create(:user, :active)
bob = create(:user, :active)