Rails - Nov 2006 - undefined local variable or method `invoices' for Provider:Class

I''m pretty new to Rails, and I think my app has progressed quicker than
my knowledge of Rails/Ruby has ...

I have the following models:

[ -- Begin -- ]
class Provider < ActiveRecord::Base
  has_many :invoices
  has_one :user

  def self.get_invoices
    invoices.find(:all)
  end
end

class User < ActiveRecord::Base
  belongs_to :Provider
  belongs_to :Consumer

  def invoices_raised
    Provider.get_invoices
  end

   ...

end
[ -- End -- ]

and when I call User.invoices_raised I get this error:

undefined local variable or method `invoices'' for Provider:Class

Now I thought that having the "has_many :invoices" line would
automatically make the connection and let me access "invoices" like
that, but obviously I''m wrong. Anyone care to correct me?

Cheers,

-S


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I''m pretty new to Rails, and I think my app has progressed quicker than
my knowledge of Rails/Ruby has ...

I have the following models:

[ -- Begin -- ]
class Provider < ActiveRecord::Base
  has_many :invoices
  has_one :user

  def self.get_invoices
    invoices.find(:all)
  end
end

class User < ActiveRecord::Base
  belongs_to :Provider
  belongs_to :Consumer

  def invoices_raised
    Provider.get_invoices
  end

   ...

end
[ -- End -- ]

and when I call User.invoices_raised I get this error:

undefined local variable or method `invoices'' for Provider:Class

Now I thought that having the "has_many :invoices" line would
automatically make the connection and let me access "invoices" like
that, but obviously I''m wrong. Anyone care to correct me?

Cheers,

-S


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I''m not sure what you''re trying to do here, but
you''re clearly
getting classes and instances confused. I think what you meant to do  
is this:

class Provider < ActiveRecord::Base
   has_many :invoices
   has_one :user
end

class User < ActiveRecord::Base
   belongs_to :provider  # Note the lower case here
   belongs_to :consumer
   has_many :invoices, :through => :provider

   ...
end

Then you can just call user.invoices for a particular user.

Cheers,

Pete Yandell


On 08/11/2006, at 10:44 AM, Stuart Grimshaw wrote:
>
> I''m pretty new to Rails, and I think my app has progressed quicker
> than
> my knowledge of Rails/Ruby has ...
>
> I have the following models:
>
> [ -- Begin -- ]
> class Provider < ActiveRecord::Base
>   has_many :invoices
>   has_one :user
>
>   def self.get_invoices
>     invoices.find(:all)
>   end
> end
>
> class User < ActiveRecord::Base
>   belongs_to :Provider
>   belongs_to :Consumer
>
>   def invoices_raised
>     Provider.get_invoices
>   end
>
>    ...
>
> end
> [ -- End -- ]
>
> and when I call User.invoices_raised I get this error:
>
> undefined local variable or method `invoices'' for Provider:Class
>
> Now I thought that having the "has_many :invoices" line would
> automatically make the connection and let me access "invoices"
like
> that, but obviously I''m wrong. Anyone care to correct me?
>
> Cheers,
>
> -S
>
>
> >

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