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thomascawthorn
22,986 PointsMissing "attr_accessible" method from user.rb and status.rb before and after devise-gem install.
I'm having huge trouble in the "Build a simple Ruby on Rails Application" section between this stage (stage 3: 'Generating the Devise Views') and stage 4: 'creating relationships'.
It relates to the "attr_accessible" method.
I've followed along with every step, and this is my second attempt starting from scratch from the beginning of 'Build a Simple Ruby on Rails Application'.
Before and after install of devise, the attr_accessible method and associated lines of code are nowhere to be found in the app->model->user.rb or app->model->status.rb.
Here is my code from app->model->user.rb :
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
Here is my code from app->model->user.rb :
class Status < ActiveRecord::Base
belongs_to :user
end
When I try and add the code from the project files/video and make both status.rb and user.rb look identical to the video, I get the following error:
undefined method `attr_accessible'.
The att_accessible portion i've been adding to these files from the project files download from stage 4: 'creating relationships'.
user.rb
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me,
:first_name, :last_name, :profile_name
and status.rb
class Status < ActiveRecord::Base
attr_accessible :content, :user_id
belongs_to :user
end
In terms of functionality before up until i needed to associate the user_id with first_name, I had no errors. Especially regarding mass user security issues both instructors seem to hit. The application worked fine until associating the user_id with the first_name in app->views->statuses->show.html.erb
When I added the association I got another error saying first_name was nil. I looked up the user_id I was logged in under (number 3) and made sure to input that into the user_id form field. I tried all numbers from 0 though 20 still with no luck.
I am stuck! Can anyone offer some answers as to why attr_accessible isn't showing up at all / anything!!
I think the steps in this video are my root problem. As I said, i've been through it twice from scratch, using different names for each application, same results both times.
Operating system OS X version 10.9.2 Ruby version: 2.1.1
8 Answers
Roberto Alicata
Courses Plus Student 39,959 PointsYes it's correct
gem install rails --version=3.2
rbenv rehash
then try
rails -v
Roberto Alicata
Courses Plus Student 39,959 PointsAre you using Rails 4? If you had this error
"`attr_accessible` is extracted out of Rails into a gem. Please use new recommended protection model for params(strong_parameters) or add `protected_attributes` to your Gemfile to use old one."
you need to install protected_attributes gem
Add this line to your application's Gemfile:
gem 'protected_attributes'
And then execute:
$ bundle
then you can use:
attr_accessible :content, :user_id
thomascawthorn
22,986 PointsThanks for your response, let me give this a try now!
thomascawthorn
22,986 PointsI've run the instructions you gave, and I got a little further - it didn't error straight away after I added attr_accessible to status.rb and user.rb.
When I create the association in show.html.erb (reference stage 4 - creating relationships)
<p>
<b>Name:
<%= @status.user.first_name %>
</b>
</p>
and then write and submit a status using the id 3 (the user_id i am logged in as - checked this in db by running ruby console and
user = User.first
).
When I get to the show page after pressing submit, I get this error: undefined method `first_name' for nil:NilClass
and it's highlighting <%= @status.user.first_name %> in the show.html.erb file.
I'm using Rails 4.1.0 and Ruby 2.0.0-p451.
I realise that these versions are different from the video hence it's not working as described. What I've been trying to do is find, download and finally run the appropriate versions on my machine.
My mbp is running mavericks so rails-installer dies when i try and install from there.
Can you point me to how I might create a version-setup to match the video? And then how would I select that specific version to run?
I've had a look at the "building a todo list with rails 4" project.. I was like YES! Come on, it must be the right version.. and then at the beginning of the video "we're using rails 4.0.1... This tutorial may not work with rails 4.1." GAHHHH!!
Again, I need to download, and run a specific version of rails to match the video. Can I still use ruby 2.0.0-p451?
I'm getting so bogged down with all this.. any clarification would be hugely, hugely appreciated!!
Roberto Alicata
Courses Plus Student 39,959 PointsIf you want to use Rails4 try to remove the gem 'protected_attributes' from the Gemfile and rerun bundle and remove all the attr_accessible on your user model.
Then add this code to app / controllers / application_controller.rb
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
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(:first_name, :last_name, :profile_name, :email, :password, :password_confirmation) }
end
end
If you want to use the same version of ruby and rails as the video, use RVM Ruby Version Manager. RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems.
thomascawthorn
22,986 PointsDo I keep
attr_accessible :content, :user_id
in status.rb?
Thanks for the tip with RVM - I'll investigate!
Roberto Alicata
Courses Plus Student 39,959 PointsI removed it and it works fine You can look at my github repository
Roberto Alicata
Courses Plus Student 39,959 PointsInstead of RVM you can also use rbenv and follow the video on treehouse
thomascawthorn
22,986 PointsSo RVM and rbenv are both used for ruby management?
Thanks for all your help so far, it's great!!
I'm going for another clean start to match the same versions as both project videos.
On my computer now I have:
- rbenv
- rails 4.1.0
- ruby 2.0.1-p451
For building a simple Ruby on Rails Application I need:
- ruby 1.9.3-p194
- rails 3.2 ( think?)
I would install rails v 1.9.3-p194 by:
rbenv install 1.9.3-p194
I could then say something like
rbenv global 1.9.3-p194
And double check with
rbenv versions
and that particular version of ruby would start running throughout my computer (let's avoid local to keep it simple for now?)
So I think i've got the ruby install together with rbenv.
But how would is start with installing the correct version of rails?
thomascawthorn
22,986 PointsAh, I would say
gem install rails --version=3.2
?
pat saunders
6,636 PointsHey Thomas, I had pretty much all the issues you did. In the end I went and read through the documentation at api.rubyonrails.org to gain a better understanding of the fundamentals of how RoR works, rather than following along just trying to make code tests pass. With a better understanding I was able to better understand the advice given in this forum and figure out solutions for myself.
You should be able to do the treebook app with the latest versions of everything now that simple_form has been updated to work with bootstrap3, you will need to use the strong params in the rails 4 docs above and check the info for devise as i am unsure whether it is updated for rails 4.
regardless of versions you will gain a much more widely applicable knowledge base by learning to read and understand the documentation associated with the various components you are using. Treehouse is awesome to enhance your knowledge!
good luck
Roberto Alicata
Courses Plus Student 39,959 PointsI agree with you, in fact I'm doing your same path, but I think that is difficult to deal with all these "errors" for someone who approaches for the first time in Rails
thomascawthorn
22,986 PointsGreat advice, thanks for your response.
It's a really strange track with regards to the order they go through the material. For instance, Ruby foundations, console foundations and git comes after you use them in a practical situation. To me that seems a little bit top-down!
I went back and installed a previous version of Ruby and Rails to run through the course - at this point, mostly so I could feel like i've accomplished something lol. I have the full intention to come back and revisit this particular badge when I've got a better understanding of the latest changes/RoR to see what else I can do!
Thanks again :)
thomascawthorn
22,986 PointsYes please!
thomascawthorn
22,986 PointsI'm now at a great starting point to follow the project thanks to your great advice!!
Thanks you so much
Roberto Alicata
Courses Plus Student 39,959 PointsYou are welcome :)
thomascawthorn
22,986 Pointsthomascawthorn
22,986 PointsEverything was going great until :
gem install rails --version=3.2It starts to install until:
Also ruby -v returns ruby 2.0.0p451 as opposed to 1.9.3-p194 even though rbenv version output is:
Will any new application still use 1.9.3?
**ADDED
I'v even gone ahead and uninstalled any other versions of Ruby, leaving only 1.9.3 and "ruby -v" still returns ruby 2.0.0p451
**ADDED.. again
used sudo class and that fixed the permissions. But ruby-v still outputs a version of ruby which is no longer installed!
**ADDED.. again.. again
Restarted the shell/cmd window and everything is outputting great.