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    <p>In your model, you can dynamically assign attributes from the keys of the serialized Hash, or Array. I've done something similar so am munging my code for a few examples below. Basically , by dynamically creating virtual attributes, using a DSL like Formtastic becomes much easier.</p> <p>With serialized Arrays : </p> <pre><code> class Info &lt; ActiveRecord::Base serialize :exhibition, Array serialize :contest, Array after_initialize :explode_exhibition after_initialize :explode_contest before_save :implode_exhibition before_save :implode_contest private def explode_exhibition() exhibition.each_with_index do |v,i| self.class.send(:attr_accessor, "@exhibition_#{i}") self.instance_variable_set("@exhibition_#{i}", v) end end def explode_contest() contest.each_with_index do |v,i| self.class.send(:attr_accessor, "@contest_#{i}") self.instance_variable_set("@contest_#{i}", v) end end def implode_exhibition() exhibition = [] self.methods.grep(/exhibition_/).each do |method_name| exhibition &lt;&lt; self.instance_variable_get("@#{method_name}", v) end end def implode_contest() contest = [] self.methods.grep(/contest_/).each do |method_name| contest &lt;&lt; self.instance_variable_get("@#{method_name}", v) end end end </code></pre> <p>With serialized Hashes : </p> <pre><code> class Info &lt; ActiveRecord::Base serialize :exhibition, Hash serialize :contest, Hash after_initialize :explode_exhibition after_initialize :explode_contest before_save :implode_exhibition before_save :implode_contest private def explode_exhibition() exhibition.each do |k,v| self.class.send(:attr_accessor, "@exhibition_#{k}") self.instance_variable_set("@exhibition_#{k}", v) end end def explode_contest() contest.each do |k,v| self.class.send(:attr_accessor, "@contest_#{k}") self.instance_variable_set("@contest_#{k}", v) end end def implode_exhibition() exhibition.each do |k,v| exhibition[k] = self.instance_variable_get("@exhibition_#{k}", v) end end def implode_contest() contest.each do |k,v| contest[k] = self.instance_variable_get("@contest_#{k}", v) end end end </code></pre> <p>And then in Formtastic you can access the attributes and build a form dynamically for each virtual attribute. Note the regex, can use some iteration, as it currently will only match self.exhibition_0 through self.exhibition_9, but it also excludes any setter methods by not matching methods like self.exhibition_0=</p> <pre><code> f.object.methods.grep(/^exhibition_.*?(?&lt;!=)$/).each do |method_name| f.input method_name end </code></pre> <p>I haven't fully tested this munged code, but the majority of this I have working in a few of my own classesn. Also, there may be a need to dynamically create the setter methods as well. Let me test this out a bit, and improve on this idea.</p>
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