如何获得带有参数的正确信息？

Question

I added column information to model User, that was generated by devise. I don't want to make user to fill field Information by registration. I created controller for other pages like profile

class PagesController < ApplicationController

  def myprofile
    @currentUser = User.find_by_id(current_user.id)
  end

  def userinfo
    @currentUser = User.find_by_id(current_user.id)

    if request.post?
      if @currentUser.update(params[:userinfo].permit(:information)) 
        redirect_to myprofile_path
      else
        render 'userinfo'
      end
    end
  end

end

On page userinfo user should be able to edit his information.

Here is view:

<div id="page_wrapper">

  <h2>Hey, <%= @currentUser.username %>, add some information about you: </h2>
  <%= form_for @currentUser.information do |f| %>
    <p>
      <%= f.label :information %><br />
      <%= f.text_area :information, autofocus: true %>
    <p>

    <p>
      <%= f.submit "Save" %>
    <p>
  <% end %>

</div>

Application Controller:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  before_action :configure_permitted_parameters, if: :devise_controller?

  protected
  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:username, :information, :email, :password, :password_confirmation, :remember_me) }
    devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:login, :information, :email, :password, :remember_me) }
    devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:username, :information, :email, :password, :password_confirmation, :current_password) }
  end
end

When I try to save it, I get

undefined method `permit' for nil:NilClass

How can I fix it? Maybe there is better way to do this job? I don't want to show whole form to edit password, username etc. Only information.

Answer 1

undefined method `permit' for nil:NilClass

You are doing it wrong. Your params will not contain :userinfo key. Your params will look like this :user => {:information => 'value'} . You should change your code to below

#controller
def userinfo
  @currentUser = User.find_by_id(current_user.id)

  if @currentUser.update(user_params) 
    redirect_to myprofile_path
  else
    render 'userinfo'
  end
end

protected
def user_params
  params.require(:user).permit(:information)
end

And also as you are trying to update a certain record, you need to change

<%= form_for @currentUser.information do |f| %>

to

<%= form_for @currentUser, method: put do |f| %>

Finally if you have set a post route for this corresponding controller#action , then you need to change it to put