我想將一個phone用戶欄位更改為必填欄位。當現有用戶沒有設定此欄位時（不必事先提供電話號碼），它應該重定向到user_edit頁面并Phone is required在表單下方顯示訊息。我正在使用Punditgem 進行授權：
class ApplicationController < ActionController::Base
include Pundit
rescue_from Pundit::NotAuthorizedError, with: :login_not_authorized
private
def login_not_authorized
flash[:alert] = 'You are not authorized to perform this action.'
redirect_to(request.referer || root_path)
end
end
如何檢查現有用戶是否有電話號碼，如果沒有，將此用戶移動到他的 EDIT 頁面并Phone is required在表單下方顯示錯誤訊息？
uj5u.com熱心網友回復：
你可以嘗試使用這樣的東西：
def login_not_authorized
if current_user&.phone.blank?
flash[:alert] = 'You must provide your phone number.'
redirect_to(user_edit_path)
else
flash[:alert] = 'You are not authorized to perform this action.'
redirect_to(request.referer || root_path)
end
end
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