ruby on rails - If statement on input select -

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in form have 

<!-- allow custom orders field --> <div class="control-group">   <label class="control-label">allow custom orders?</label>   <div class="controls">     <%= f.select :allow_custom_orders, [["yes", 1], ["no", 2]],                  label: false %>    </div> </div>

on show want check if "yes" or "no" selected , show button.

<% if @shop.allow_custom_orders = "1"  %>   <div>     <small>need custom order?</small>     <%= link_to "request custom order", "#",                 class: "btn btn-small btn-embossed btn-block btn-info" %>   </div>   <% end %>

but seems not work, suggestions ?

i'm new rails bear me :)

ok found out :) pretty simple 

<% unless @shop.allow_custom_orders == 2  %>

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