Set HTML id attribute in Rails form select box -

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How do I set ID attributes in my drop down box?

Here's my part of the question in question: 

   & Lt;% = builder.link_to_remove "Remove this item"%> & Lt;% end% & gt;   
 the: id = & gt; The "Quantity_field" method works for text fields, but to see the HTML source for the selected fields I'm getting an ID of "estimate_items_attributes_0_material" for the content text box.  
 This is a strange incompatibility Any help would be greatly appreciated.   
 
 
 There is a parameter between the possible option and the HTML option. Then you have to do this:  
  & lt;% = builder Selection: Thickness, @ letters.map {| L [L.thickness, l.thickness]}, {} ,: id = & gt; "Thick_field"% & gt; You can find a doctor here:  
 And it can also be helpful:

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