Rails3 Model without ActiveRecord

Hi,

I was reading about ActiveModel to ride rails without ActiveRecord,
but the documentation doesn’t include info about find, and how to
implement search functionality.

I need to do the following:

  • i have a simple controller which get 2 parameters (:country, :city)
  • i would like to implement a simple search which returns the
    population of the city

Controller code:

@country = params[:country]
@city = params[:city]
@population = Population.find(:country => @country, :city => @city)

How should I implement find in the model? The data is in plain text
files(don’t ask), and I can look up in it using country_city as key
and the population as value (simple hash).

Thank you in advance,
Istvan

On Mar 8, 2011, at 8:58 AM, lix wrote:

population of the city

Controller code:

@country = params[:country]
@city = params[:city]
@population = Population.find(:country => @country, :city => @city)

How should I implement find in the model? The data is in plain text
files(don’t ask), and I can look up in it using country_city as key
and the population as value (simple hash).

The fetch method will return the value from a given key in a hash.
http://corelib.rubyonrails.org/classes/Hash.html#M000689

Walter

On Tue, Mar 8, 2011 at 2:58 PM, lix [email protected] wrote:

Controller code:

@country = params[:country]
@city = params[:city]
@population = Population.find(:country => @country, :city => @city)

How should I implement find in the model? The data is in plain text
files(don’t ask), and I can look up in it using country_city as key
and the population as value (simple hash).

Perhaps you don’t even need Active Model?

So just to answer my question:

def self.find(key)
return @h[key]
end

Where h is the hash I have created from the file.

Thanks all,

I.

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