d_model_field_namespace'>model_field_namespace</span><span class='period'>.</span><span class='id identifier rubyid_constantize'>constantize</span> <span class='kw'>if</span> <span class='id identifier rubyid_model_field_namespace'>model_field_namespace</span><span class='period'>.</span><span class='id identifier rubyid_is_a?'>is_a?</span><span class='lparen'>(</span><span class='op'>::</span><span class='const'>String</span><span class='rparen'>)</span>
    <span class='kw'>if</span> <span class='id ident