getting id in an array

Hi,
I'm begining with rails I need to get an array of all id of a table.

name of my model is ContentGroup so I tried ContentGroup.find(:all,
:order=>"ASC")
but I have an array of objet and I only need the ids.

How can I do to get only id fields ?

Hi,
I'm begining with rails I need to get an array of all id of a table.

name of my model is ContentGroup so I tried ContentGroup.find(:all,
:order=>"ASC")
but I have an array of objet and I only need the ids.

How can I do to get only id fields ?

ContentGroup.find(:all, :order=>"ASC").collect {|cg| cg.id}

David Nguyen wrote:

Hi,
I'm begining with rails I need to get an array of all id of a table.

name of my model is ContentGroup so I tried ContentGroup.find(:all,
:order=>"ASC")
but I have an array of objet and I only need the ids.

How can I do to get only id fields ?

Hi
Try this
@user=ContentGroup.find(:all,:select=>"id",:order=>"id asc")

David Nguyen wrote:

Hi,
I'm begining with rails I need to get an array of all id of a table.

name of my model is ContentGroup so I tried ContentGroup.find(:all,
:order=>"ASC")
but I have an array of objet and I only need the ids.

How can I do to get only id fields ?

ContentGroup.find(:all, :select => 'id').map(&:id)