Rails - Dec 2006 - Trimming a collection of AR objects?

I have a collection of acts_as_ferret search results that I need to trim
based on an attribute.  I''ve been trying to iterate through the
collection but haven''t been able to make this work.  Here is what I
have
tried unsuccessfully:

@people.each {|person| person.clear if person.privacy_type ==
"private"}

Unfortunately Class Person does not respond to clear since it is an AR
object not a hash.  Even if it were an hash, I feel like I need to
perform the operation on the COLLECTION of hashes @people anyways.

However, checking @people with <%= @person.class %> tells returns an
unhelpful ''NilClass.''  How can I iterate through @people and
delete all
the ones with privacy_type == "private?"

-- 
Posted via http://www.ruby-forum.com/.

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Taylor Strait wrote:
> I have a collection of acts_as_ferret search results that I need to trim
> based on an attribute.  I''ve been trying to iterate through the
> collection but haven''t been able to make this work.  Here is what
I have
> tried unsuccessfully:
>
> @people.each {|person| person.clear if person.privacy_type ==
"private"}
>
> Unfortunately Class Person does not respond to clear since it is an AR
> object not a hash.  Even if it were an hash, I feel like I need to
> perform the operation on the COLLECTION of hashes @people anyways.
>
> However, checking @people with <%= @person.class %> tells returns an
> unhelpful ''NilClass.''  How can I iterate through @people
and delete all
> the ones with privacy_type == "private?"
>
>   
Something like:

@people.find_all {|person| person.privacy_type != "private"}

See:
http://corelib.rubyonrails.org/classes/Enumerable.html#M002177



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Taylor Strait wrote:
> I have a collection of acts_as_ferret search results that I need to trim
> based on an attribute.  I''ve been trying to iterate through the
> collection but haven''t been able to make this work.  Here is what
I have
> tried unsuccessfully:
> 
> @people.each {|person| person.clear if person.privacy_type ==
"private"}
> 
> Unfortunately Class Person does not respond to clear since it is an AR
> object not a hash.  Even if it were an hash, I feel like I need to
> perform the operation on the COLLECTION of hashes @people anyways.
> 
> However, checking @people with <%= @person.class %> tells returns an
> unhelpful ''NilClass.''  How can I iterate through @people
and delete all
> the ones with privacy_type == "private?"
> 
@people.delete_if{ |person| person.privacy_type == ''private'' }

Look at the Ruby documentation for the Array class, and also Enumerable.

http://www.ruby-doc.org/core/classes/Array.html
http://www.ruby-doc.org/core/classes/Enumerable.html

Zach
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Damn, I was close.  I didn''t have a good grasp on what was actually 
inside @people  which caused me to overlook using delete_if on it 
directly.  Thanks to both of you for your help.

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