Rails validate uniqueness

Rails validators

validates :name, length: { minimum: 2 } # or { maximum: 500 } or { in: 6..20 } or { is: 6 } 
validates :name, :login, :email, presence: true
validates :email, uniqueness: true
validates :switch, inclusion: { in: [true, false]  }
validates :terms_of_service, acceptance: true
validates :size, inclusion: { in: %w(small medium large), message: "%{value} is not a valid size" }
validates :legacy_code, format: { with: /\A[a-zA-Z]+\z/, message: "only allows letters" }

Source: guides.rubyonrails.org

Rails validate uniqueness

validates :email, uniqueness: true

Similar codes

0 vote294 views1 answer
Ruby extend
Ruby
0 vote294 views3 answers
Rails callback STI
Ruby
0 vote261 views1 answer
Difference between Hash.new and Hash.new { |h, k| h[k] = [] }
Ruby
0 vote356 views5 answers
Return tuple or null
Ruby
0 vote336 views3 answers
Logback grails log in different files
Ruby
0 vote318 views1 answer
Comparator.constructors[0].newInstance([domainClass] in grails 3
Ruby
1 vote270 views1 answer
Array of random letters ruby
Ruby
0 vote247 views1 answer
Rails logger color
Ruby
0 vote298 views1 answer
Ruby name parameters
Ruby
0 vote291 views1 answer
Rails form_tag
Ruby