How to access current_user object in model? - ruby-on-rails

Question

I am trying to write a method in my "team" model but current_user is showing this error
undefined local variable or method `current_user' for #
def set_default_url
if current_user.id == self.user_id
"/assets/default_black_:style_logo.jpg"
else
"/assets/default_:style_logo.jpg"
end
end
The method current_user is working fine for other models and controllers . I am calling this method like this .
has_attached_file :logo, :styles => {
:medium => "200x200#",
:thumb => "100x100#",
:small => "50x50#"
},
:default_url => :set_default_url
I am using rails 3.2 , ruby 1.9.3 and devise 3.1 . It seems to be simple task but I don't understand where the fault lies . I will be really thankful if someone helps me out here .

Answer 1

current_user is not available in any model, to access current_user in model do this
In your application controller
before_filter :set_current_user
def set_current_user
Team.current_user = current_user
end
in your Team model add this line
cattr_accessor :current_user
Congrats, now current_user is available in every model, to get the current user just use the following line everywhere
Team.current_user
NOTE: Restart the server after adding the lines mentioned above!
Now in your question you can use it like
def set_default_url
if Team.current_user.id == self.user_id
"/assets/default_black_:style_logo.jpg"
else
"/assets/default_:style_logo.jpg"
end
end
Hope this helps!

Answer 2

If you are using it only once than while calling this method pass current_user as argument like
has_attached_file :logo, :styles => {
:medium => "200x200#",
:thumb => "100x100#",
:small => "50x50#"
},
:default_url => :set_default_url(current_user)
and in model
def set_default_url(current_user)
if current_user.id == self.user_id
"/assets/default_black_:style_logo.jpg"
else
"/assets/default_:style_logo.jpg"
end
end
If you dont want above step then follow these
Go to User Model
def self.current_user
Thread.current[:user]
end
def self.current_user=(user)
Thread.current[:user] = user
end
Then go to application controller
before_filter :set_current_user
def set_current_user
User.current_user = current_user
end
Now we can easily fetch current_user in any model not only in Team
just give as User.current_user so in your code
def set_default_url
if User.current_user.id == self.user_id
"/assets/default_black_:style_logo.jpg"
else
"/assets/default_:style_logo.jpg"
end
end
So make use of it.
Hope it solves your issue in a good way. Free to use in any model
User.current_user to fetch the current user
User.current_user= to assign the current user.
Thanks