Rails - Nov 2007 - call model method out of the controller => undefined method

Hi,

I''m a newby and I fight with the Rails convention - i think so.
I''ve done little tools and scripts in Ruby before.

I''ve successfully uploaded a textfile. And now i want to extract some
filecontent to pass it into a database.

My Problem:
I can not start a given method of a given Model (=>
Metadata.extract_content(fileuri)). The error message ''undefined method
`extract_content'' for Metadata:Class'' is raised. But the
method is still
there!?

My Controller Action:
#########################################

  def upload
    @schema_file = params[:schema_file]

    @file = File.new(File.join("D:","testfile.txt"),
"wb")
    if @schema_file
      @file << @schema_file.read
    end
    @file.close

    Metadata.extract_content(@file) # <- error causing line

    render :action => ''load''
  end

#########################################


My Model:
#########################################

class Metadata < ActiveRecord::Base

  def extract_content file
    # logic
  end

end

#########################################

Apart from this i''m not allowed to call any extern method out of the
controller. (?)

- How can i call extern method?
- Are there any RoR conventions or constrains for this topic?

Thanks for helping.
Daniel
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use:

class Metadata ...
def self.extract_content ...

to define it on class level

your version would have to be called with an object:
@thing = Metadata.new(...)
@thing.extract_content(@file)
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Thanks. Problem solved.
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