From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-11-02T11:52:08+09:00
Subject: Re: How can I avoid this boring code?

On Wed, 2 Nov 2005, Sam Kong wrote:

> Hi!
>
> I'm creating a class.
> I wonder if there's a better way.
>
> require 'dbi'
>
> class Person
>  attr_accessor :person_id,
>    :last_name,
>    :first_name,
>    :home_phone,
>    :work_phone,
>    :address,
>    :city,
>    :state,
>    :zip
>
>  def initialize(row=nil)
>    if row.class == DBI::Row then
>      @person_id = row.by_field("person_id")
>      @last_name = row.by_field("last_name")
>      @first_name = row.by_field("first_name")
>      @home_phone = row.by_field("home_phone")
>      @work_phone = row.by_field("work_phone")
>      @address = row.by_field("address")
>      @city = row.by_field("city")
>      @state = row.by_field("state")
>      @zip = row.by_field("zip")
>    end
>  end
> end
>
> The code in initialize method is very boring.
> How could I make it simpler?

   class Person
     FIELDS = %w(
       person_id last_name first_name home_phone work_phone address city state zip
     )
    def initialize r = nil
      FIELDS.each{|f| send "#{ f }=", r.by_field(f)} if row.class == DBI::Row
    end
   end

if the Person class can dynamically set FIELDS by inspecting a table - so much
the better.

hth.

-a
-- 
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