Call model method out of the controller => undefined method

Rails
1

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

2

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)

3

Thanks. Problem solved.

4

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