I have a MongoDB field with spaces, something like 'Hello World'. I am able to do the following:

class MyDocument
include Mongoid::Document
end

_field = 'Hello World'

MyDocument.class_eval <<-EOS
field :'#

{ _field }', type: #{_type}
EOS

But I need to override the setter of the field. And the below options do not work:

MyDocument.class_eval <<-EOS
def #{ _field }

=(val)
self['#

{ _field }'] = [self.send('#{ _field }

')[0], val]
end
EOS

MyDocument.instance_eval do
define_method _field do |val|
super([self.send(_field)[0], val])
end
end

How am I supposed to override the setter of the field?