V! R"#$p% %&'( f)*%%"% !S+,&' COURTOIS - @-)pp.'&/

^...$

^...$

class User < ActiveRecord::Base attr_accessible :email

validates :email, presence: true, uniqueness: true, format: { with: / /i }end

http://www.regular-expressions.info/email.html

^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$

^...$

toto@exemple.fr ✔

✗totoexemple.fr

hellototo@exemple.frhello

✔

^...$

ˆ...$

http://ruby-doc.org/core-1.9.3/Regexp.html

Anchors

^ - Matches beginning of line$ - Matches end of line

^...$

hello

totoexemple.fr

hello

➜

➜

➜

\A...\Z

http://ruby-doc.org/core-1.9.3/Regexp.html

Anchors

^ - Matches beginning of line$ - Matches end of line\A - Matches beginning of string\Z - Matches end of string

\A...\Z

class User < ActiveRecord::Base attr_accessible :email

validates :email, presence: true, uniqueness: true, format: { with: /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i }end

\A...\Z

class User < ActiveRecord::Base attr_accessible :email

validates :email, presence: true, uniqueness: true, format: { with: /\A[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\Z/i }end

\A...\Z

toto@exemple.fr ✔

✗totoexemple.fr

hellototoexemple.frhello

✗

\A...\Z

M"r0+ !S+,&' COURTOIS - @-)pp.'&/