I have a model that allows subclasses to dynamically define fields.
The following code is a short test case that illustrates the problem I'm
having:
class Product < ActiveRecord::Base
acts_as_ferret :fields => [:name]
serialize :data
def self.data_properties (*properties)
properties.each do |property|
define_method(property) {self.get_property(property)}
define_method((property.to_s + '=').to_sym) \
{|value| self.set_property(property, value)}
end
end
def get_property (property)
self[:data][property] if self[:data]
end
def set_property (property, value)
self[:data] = Hash.new unless self[:data]
self[:data][property] = value
end
end
Here's the migration for said model:
class CreateProducts < ActiveRecord::Migration
def self.up
create_table :products do |t|
t.column :name, :string
t.column :type, :string
t.column :data, :string
end
end
def self.down
drop_table :products
end
end
An example of a couple subclasses are:
class Book < Product
acts_as_ferret :fields => [:name, :author, :pages]
data_properties :author, :pages
end
and:
class Music < Product
acts_as_ferret :fields => [:name, :artist, :label]
data_properties :artist, :label
end
Creating a couple of records works fine:
>> (Book.new(:name => 'Moby Dick', :author => 'Herman Melville', :pages =>
>> 704)).save
=> true
>> (Music.new(:name => 'Abbey Road', :artist => 'The Beatles', :label =>
>> 'Apple')).save
=> true
But things start to get strange when I search for content:
>> Book.find_by_contents('*')
=> #<FerretMixin::Acts::ARFerret::SearchResults:0xb7433ef8
@total_hits=2, @results=[]>
>> Music.find_by_contents('*')
=> #<FerretMixin::Acts::ARFerret::SearchResults:0xb7431360
@total_hits=2, @results=[#<Music:0xb7431608 @attributes={"name"=>"Abbey
Road", "type"=>"Music", "id"=>"2", "data"=>"--- \n:artist: The
Beatles\n:label: Apple\n"}>]>
I can provide debug output for the above commands if you'd like.
My ultimate goal here is to be able to find Products by fields only
defined for Products (i.e. name) as well as to be able to find
subclasses of Products by their respective fields (i.e. find Music by
artist).
Any help, insight, or even telling me that I'm smoking crack would be
greatly appreciated.
Regards,
Evan
--
Posted via http://www.ruby-forum.com/.
_______________________________________________
Ferret-talk mailing list
[email protected]
http://rubyforge.org/mailman/listinfo/ferret-talk
