How to retrieve find options from named scopes
Posted by Sandro Paganotti in
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Hi, It’s been a while since my last post, I apologize but I have been really busy with coding and testing (Cucumber is awesome!) for a quite important project. Within these days I came across this interesting trick that lets me discover how to return a ready-for-find options hash from a named_scope and also from an association.
So, let’s take this (simple) named scope for example:
named_scope :name, lambda do |query|
firstname, lastname = query.split(" ")
{:conditions=>{:firstname =>firstname, :lastname => lastname}}
end
By calling the method ‘proxy_options’ after the scope you’ll be able to retrieve the generated options Hash:
User.name(“Sandro Paganotti”).proxy_options
# {:conditions=>{:firstname=>”Sandro”, :lastname=>”Paganotti”}}
If you need to obtain the same result from an association you can use the method ‘construct_scope’ as follows
User.first.comments.send(:construct_scope)[:find]
# {:limit=>nil, :readonly=>false, :order=>nil, :include=>nil, :conditions=>”`comments`.user_id = 1”}
Sandro
