i'm building a social media website with Ruby on Rails and i'm following instructions from teamtreehouse.com . Every time i make a new status or go to the index page i get this message
undefined method `full_name' for nil:NilClass
<p>
<strong>Name:</strong>
<%= #status.user.full_name %>
</p>
I coded my pages to show the full name with this
<%= #status.user.full_name %>
and
<%= status.user.full_name %>
for the index page.
I have included all of these snippets of code into my project as well
status.rb
class Status < ActiveRecord::Base
attr_accessible :content, :user_id
belongs_to :user
end
user.rb
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me,
:first_name, :last_name, :profile_name
# attr_accessible :title, :body
def full_name
first_name + " " + last_name
end
end
I've tried using rake db:reset and rake db:migrate but nothing seems to solve the error problem. Thank you for your help!
As per the error,
undefined method `full_name' for nil:NilClass
which means that
#status.user = nil
i.e., the particular status instance that you are looking at(#status) doesn't have an associated user record.
You can verify it by going to rails console
Status.find(pass_the_id) ## pass the id of #status instance
You will notice that user_id is nil for that record.
Set the value to an existing user_id and try again.
Note: you might need to take a deeper look at how you are storing a status in your application. I suppose you are missing to store user_id attribute there
Looks like you'd need to include has_many :statuses in the User model
You may also wish to use the .delegate() method:
class Status < ActiveRecord::Base
attr_accessible :content, :user_id
belongs_to :user
delegate :full_name, to :user, prefix: :author
end
This should allow you to call #status.author_full_name
Related
In my Rails project, I am trying to set up user authentication and user roles using the following Gems:
Devise
Cancan
Rolify
I had Devise up and working perfectly, but then when I went to set up CanCan and Rolify, I get this error in the browser:
NameError in Home#index
Showing C:/Sites/JustManage/app/views/devise/menu/_registration_items.html.erb where line #1 raised:
undefined local variable or method `rolify' for #<Class:0x3f48660>
Extracted source (around line #1):
1: <% if user_signed_in? %>
2:
3: <li>
4: <%= link_to('Edit registration', edit_user_registration_path) %>
Trace of template inclusion: app/views/layouts/application.html.erb
Rails.root: C:/Sites/JustManage
user.rb
class User < ActiveRecord::Base
rolify
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me, :subdomain, :first_name, :last_name
# Make sure certain attributes are unique
validates_uniqueness_of :email, :case_sensitive => false
end
role.rb
class Role < ActiveRecord::Base
has_and_belongs_to_many :users, :join_table => :users_roles
belongs_to :resource, :polymorphic => true
scopify
end
rolify.rb
Rolify.configure do |config|
config.use_dynamic_shortcuts
end
Let me know if you need me to post contents from any of my other files!
I had the same issue. Restarting my server fixed it!
'When in doubt, ctrl-c out!'
Is it safe to assume that you installed and subsequently required the rolify gem properly?...
Please verify that rolify is listed when you run gem list and that you have added require 'rolify' at the top of your user.rb file.
I have a polymorphic relationship for my User model. I am using Devise.
When I try to edit the user's details, I get the following error:
undefined method `primary_key' for ActiveSupport::HashWithIndifferentAccess:Class
The data submitted through the form is:
{"utf8"=>"✓",
"_method"=>"put",
"authenticity_token"=>"Ap0JP2bs/w9J6iI9rZahiKR1K8UEIi7rp33a4OutMbo=",
"user"=>{"email"=>"some_email#yahoo.com",
"rolable"=>{"first_name"=>"Christopher",
"last_name"=>"Columbus",
"city"=>"16"}},
"commit"=>"Update"}
The controller method is:
def update
#user = User.find(current_user.id)
if #user.update_attributes(params[:user])
redirect_to edit_user_registration_path, notice: 'Your profile was successfully updated.'
else
redirect_to edit_user_registration_path, error: "Something went wrong, couldn't update your profile!."
end
end
The models:
1. User
class User < ActiveRecord::Base
belongs_to :rolable, :polymorphic => true
# Devise business
devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :remote_avatar_url, :avatar, :login, :username, :email, :password, :password_confirmation, :remember_me
# For authenticating with facebook
attr_accessible :provider, :uid, :rolable
devise :omniauthable, :omniauth_providers => [:facebook]
# For authenticating with both username or email
attr_accessor :login
# Upload avatar
mount_uploader :avatar, AvatarUploader
# Makes username necessary
validates :username, :presence => true
end
2. Customer
class Customer < ActiveRecord::Base
has_one :user, :as => :rolable
has_one :preferences, :class_name => "CustomerPreferences"
belongs_to :city
attr_accessible :first_name, :last_name
end
What's the problem?
Based on your request hash, you are passing the rolable attribute as:
"rolable"=>{"first_name"=>"Cristian",
"last_name"=>"Gavrila",
"city"=>"16"}
You can't do this unless you specify that the User model accepts nested attributes for rolable. However, you have setup your User as belonging to a Rolable rather than the other way around. Nested attributes aren't designed to handle this inverse relationship - you may want to reconsider what you are trying to accomplish here, and modify the relationship accordingly.
For instance, you may want to turn your hash inside out and pass the rolable attributes with the user attributes embedded within. Or you may want to turn rolable into a has_one association.
I would like to know how to get the current user that is logged in via the active admin GUI?
Homepage: http://www.activeadmin.info/
Thanks in advance
MODEL
admin_user.rb
class AdminUser < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me, :id , :admin_permission
# attr_accessible :title, :body
has_one :admin_permission
validates_uniqueness_of :email
def self.current_logged_user
# ?
end
end
UPDATE
When I try to use the method 'current_user' in dashboard.rb or any active admin related file, apparently it is not implemented.
OUTPUT
undefined local variable or method `current_user' for
The active admin user is called AdminUser by default. The corresponding devise helper method is therefore current_admin_user.
reload the page and see in your terminal, in this case, puts the correct current_user logged email.
index do
column :name
column :email
column :slug
column :partner
puts current_user.email
default_actions
end
ActiveAdmin v1.x
index do
selectable_column
column :id
column :name
column :current_user_email do
current_user.try(:email)
end
actions
end
New to Rails and I have read the association manuals and tried to find an answer to why my association is not working.
I chose to separate the Profile from the user for ease of association to different user types and functions - I will have 3-4 different models for each type of user.
I have:
User model using Devise
Profile Model Called Temper
Dashboard View
If I am trying to call the information from the Profile model on the dashboard for the current user the code below "should" work if I am reading the guides right.
ERROR IS:
enter code hereundefined method `temp_phone_n' for #<User:0x007fbb8c62e4c8>
I see that it IS picking up the current user and trying to associate it but to no avail.
Can anyone tell me where I am going wrong.
Below:
user.rb
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me,
:first_name, :last_name, :profile_name, :user_id
# attr_accessible :title, :body
has_one :temper
def full_name
first_name + " " + last_name
end
end
Temper.rb
class Temper < ActiveRecord::Base
attr_accessible :first_name, :last_name, :temp_about, :temp_avail, :temp_city, :temp_country, :temp_email, :temp_phone_d, :temp_phone_n, :temp_pors, :temp_skills, :temp_st_address_1, :temp_st_address_2, :user_id
has_one :user
end
Dashboard/index.html.erb
<div class="span5">
<ul>
<li><h4>Name:</h4> <%= current_user.full_name %></li>
<li><h4>Phone Number:</h4> <%= current_user.temp_phone_n %></li>
<li><h4>Email:</h4> <%= current_user.email %></li>
<li><h4>City:</h4> Toronto</li>
<li><h4>Member Since:</h4> <%= current_user.created_at.strftime("%B %d, %Y") %></li>
</ul>
</div>
Any assistance would be appreciated
You can access it like that:
current_user.temper.temp_phone_n
And your relationship is wrong, you can't write has_one to both side of the relationship
User.rb
has_one :temper
Temper.rb
belongs_to :user
I'm fairly new to rails and trying to add a belongs_to association to my Devise User model.
The error I get when trying to render the view:
NoMethodError in Devise/registrations#edit
undefined method `department_id' for #
This error is occurring on the collection_select in my view. Isn't this method provided by the belongs_to association?
User model
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable, :lockable and :timeoutable
devise :invitable, :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me
belongs_to :department
end
Edit view
%h2
Edit #{resource_name.to_s.humanize}
= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => { :method => :put }) do |f|
= devise_error_messages!
%p
= f.label :email
%br/
= f.text_field :email
%p
= f.label :department
%br/
= collection_select(resource_name, :department_id, Department.all, :id, :name)
%p
...
As mentioned by #njorden, be sure to do the following:
migrate to add department_id to your users table
attr_accessible :department_id to allow mass assignment via edit registration form
This really should work, I have a belongs_to :business on my devise User model and an analogous collection_for_select works great. The only thing I can think of is that maybe your migrations haven't run and you don't have the user.department_id column yet?
That looks backwards. collection_select would be appropriate for the has_many side of the association. Note that the semantic hint here is that when an object belongs_to another object it's singular. There is no collection involved. You ask for department and get back a one object. From the other direction, if your Department was set to has_many :users then asking for users would give you a list of users.
Take a look at the docs for select. They give a simple example of what you're trying to do with departments (in the form of choosing an author for a blog post).
Just to add my case, I had a similar issue. Initially each user had a department with a department_id, then I moved to a has_many, and forgot to remove the department_id from user. Solution was to delete department_id off of user.