ruby on rails - How to make the "update" function -

i new ror. started make registration of user login, showing , deleting, cant make edit/update function. going post register function , html form used register , want same use edit/update.

the register function

def register @name = params[:name] @surname = params[:surname] @username = params[:username] @password = params[:password] @email = params[:email] @tel = params[:tel] @role_id = params[:role_id] user = user.create_with_password(@name,@surname,@username,@email,@password,@tel,@role_id) if user   #session[:signed_in] = true   session[:username] = user.username   redirect_to "/menaxhimi_pushimit/index" else   redirect_to "/menaxhimi_pushimit/index" end 

end

user model

    def self.create_with_password(name, surname, username, email, password, tel, role_id)     salt = securerandom.hex     password_hash = self.generate_hash(password, salt)      self.create(         name: name,         surname: surname,         username: username,         email: email,         salt: salt,         password_hash: password_hash,         tel: tel,         role_id: role_id         ) end   def verify_password(password)     self.password_hash == user.generate_hash(password, self.salt) end  def self.generate_hash(password, salt) digest = openssl::digest::sha256.new digest.update(password) digest.update(salt) digest.to_s end 

end

my html form

      <form action='/menaxhimi_pushimit/update' class='validate-form' method='post'>     <input type="name" placeholder="name" name="name" required />     <input type="surname" placeholder="surname" name="surname" required />     <input type="username" placeholder="username" name="username" required />     <input type="password" placeholder="password" name="password" required />     <input type="email" placeholder="email" name="email" required />     <input type="tel" placeholder="tel" name="tel" required />     <input type="roli" placeholder="roli" name="role_id" required />     <input type="submit" value="sign up" />   </form> 

can how modify register edit/update

thanks in advance

the benefit using rails conventions if use them u don't have write own custom code. need google , learn basic crud operations using rails-4.

here link of demo user authentication app u can follow code , make own.