Handles the reversing of reversible migrations. Basically records supported methods calls, translates them to reversed calls, and returns them in reverse order.
Reverse the actions for the given block. Takes the block given and returns a new block that reverses the actions taken by the given block.
# File lib/sequel/extensions/migration.rb, line 164 def reverse(&block) begin instance_eval(&block) rescue just_raise = true end if just_raise Proc.new{raise Sequel::Error, 'irreversible migration method used, you may need to write your own down method'} else actions = @actions.reverse Proc.new do actions.each do |a| if a.last.is_a?(Proc) pr = a.pop send(*a, &pr) else send(*a) end end end end end
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