Find a record in existing resultset

My setup: Rails 3.0.9, Ruby 1.9.2

Let's say I did a find all on a model

@projects = Project.all

Now I would like find an individual record with开发者_如何学运维in the resultset just returned without having to make it another SQL call. This line of code triggers a new SQL call, I'll like to avoid it if possible, figures there should be a way to grab the record from the resultset

@projects.find(1)

@projects is just an array of Project objects now you can simply use any ruby operator that operates on arrays to find the object you want.

For example:

@projects.first {|item| item.id == 1} 

is the same as your example.

You could also use something like:

 @projects.select {|item| item.foo == 3} 

if you knew you could match multiple items.

I prefer @projects.detect { |item| item.foo == 3 } over @projects.select { |item| item.foo == 3 }.first, because it stops the iteration upon finding the first match.