Getting an attribute directly from rails Class.find(:all) array of objects

Question

I know that Person.find(:all) returns an array of Person objects but is there somehow I can just get 'name' property of all people in the Person table?

Something like

        Person.find(:all).names

futuremint · Accepted Answer · 2011-02-14 20:05:24Z

6

Use :select to retrieve only specific attributes.

Person.all(:select => :name)

Would give you person objects that only have the name attribute initialized. Then you can map/collect that attribute to get the array of names.

answered Feb 14, 2011 at 20:05

futuremint

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3 Comments

varatis Over a year ago

One less step: Person.all.collect(&:name)

Besi Over a year ago

This is a nice approach, why do you have to use the & for &:name?

Lou Alicegary Over a year ago

@Besi it's a shorthand way of doing Person.all.collect { |p| p.name } or the following three-liner: Person.all.collect do |p| p.name end This is a good explanation: stackoverflow.com/a/9468624/444681

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