with_options(options) public

An elegant way to refactor out common options 

 with_options :order => 'created_at', :class_name => 'Comment' do |post| post.has_many :comments, :conditions => ['approved = ?', true], :dependent => :delete_all post.has_many :unapproved_comments, :conditions => ['approved = ?', false] post.has_many :all_comments end

Can also be used with an explicit receiver: 

 map.with_options :controller => "people" do |people| people.connect "/people", :action => "index" people.connect "/people/:id", :action => "show" end
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February 23, 2009
6 thanks

Nested with_options

You can nest with_options blocks, and you can even use the same name for the block parameter each time. E.g.:

class Product with_options :dependent => :destroy do |product| product.with_options :class_name => 'Media' do |product| product.has_many :images, :conditions => {:content_type => 'image'} product.has_many :videos, :conditions => {:content_type => 'video'} end product.has_many :comments end end
May 18, 2012
0 thanks

Beware nested with_options clobbers!

Careful:

with_options :foo => :bar do |something| something.with_options :foo => :baz do |inner| what_is(:foo) end end

:foo will be :baz. It will not be [:bar, :baz], for example.

This bit me when trying to do nested with_options for validation where both had :if => something.