try to make almost the same thing as devise from scratch

[hi-ogawa]

what i think i need

• username validation by the syntax and length
• email validation by the syntax
• password validation by its length
• check password and password_confirmation when creation of user
• save password with encryption

validation helpers

• syntax (regex): http://guides.rubyonrails.org/active_record_validations.html#format
• length: http://guides.rubyonrails.org/active_record_validations.html#length
• confirmation: http://guides.rubyonrails.org/active_record_validations.html#confirmation
• custom: http://guides.rubyonrails.org/active_record_validations.html#performing-custom-validations, http://api.rubyonrails.org/classes/ActiveModel/Validations/ClassMethods.html#method-i-validate

what is already done by myself

• keep current_user and redirect if necessary (authenticate_with_token!)
• generate auth token (this is already implemented by myself)

[hi-ogawa]

for starter,

• just add username attribute
• add validation as its length, uniqueness, presense

process

• migration add username to users
• validation