Rails登入功能

generate scaffold member

創造member的scaffold

$ rails g scaffold member name email password_digest

修改create tbale的一些東西，增加了session_token

db/migrate/20xxxxx_create_members.rb

    def create  

        t.string :name, unique: true,

        t.string :email, unique: true,

        t.string :password, 

        + t.string :session_token, unique: ture, index,true

        t.timestamps

    end

end