Ruby-on-rails 如何验证 ActiveRecord 中电子邮件字段的格式？
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How would one validate the format of an email field in ActiveRecord?
提问by asmista
I have a User model in a Rails application which has an email field. Is there a default validation that will ensure the email is in the correct format? If not, how would I go about validating that field?
我在具有电子邮件字段的 Rails 应用程序中有一个用户模型。是否有默认验证可以确保电子邮件的格式正确？如果没有，我将如何验证该字段？
回答by Jonathan Vukovich-Tribouharet
Add in your gemfile:
在您的 gemfile 中添加：
gem 'validates_email_format_of'
and in your model:
并在您的模型中：
validates :email, email_format: { message: "doesn't look like an email address" }
Or if you don't want use a gem, use regex:
或者，如果您不想使用 gem，请使用正则表达式：
validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
