Re: [Rails-core] #3527, flash and halted filter chains

[Caio Chassot]

On 2006-07-21, at 23:48 , Rick Olson wrote:
Now regarding this flash business, is it possible to do flash.keep if
you want to keep the flash on a halted before filter (assuming the
default is changed to just sweep unconditionally)?

If, in the halting before filter, you need to keep the flash from the  
previous action, calling flash.keep will work fine.

Here's another contrived example that demonstrates that:

class TestController < ApplicationController
  FLASH = "<pre><%=
    {}.update(flash).to_yaml %><%=
    {}.update(flash.instance_variable_get('@used')).to_yaml %></pre>"

  before_filter :redir, :only => 'skip'

  def one
    flash[:foo] = 'bar'
    render :inline => "#{FLASH}1. <%= link_to 'next', :action =>  
'skip' %>"
  end

  def skip
    render :inline => "#{FLASH}skip"
  end

  def two
    render :inline => "#{FLASH}2. <%= link_to 'next', :action =>  
'three' %>"
  end

  def three
    render :inline => "#{FLASH}3. see..."
  end

  private

  def redir
    flash.keep
    redirect_to :action => 'two'
    false
  end
end


With my patch, the flash will be available to actions: one, skip,  
two. Without it, action three will still have the flash, which feels  
buggy.

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