Select tag : How to use params to set the selected value?

Question

I have a select tag with 2 options :

 select_tag :type,  options_for_select("<option value = 'produit1'>Produit1</option><option value = 'Produit2'>Produit2</option>", params[:product]), id: "different_option_value_html", onchange: "this.form.submit();", include_blank: "Which products ?"

When one of this options are selected, the form is automatically submit. I would like to keep the params in first position. I mean visible without clicking on the select, at the place of "which products".

Bypath

include_blank: params[:product]? – Clatter

I already tried this option, it seems the more obvious to me, but it displayed nothing at all. – Bypath

may be because params[:product] is nil or empty string? – Clatter

I don't think because the param is present in the url, and the products are well filtered – Bypath

just check what's in params[:product], maybe you want params[:product][:name] or something. Debug the value of params[:product] and make sure it is there – Clatter

When I use pry to debug I get : params[:product] = "produit1" – Bypath

then it should work just fine. may be add explicit braces { include_blank: params[:product] } – Clatter

Yeah that was it ! The only problems is that "which products?" completely disapear and my list look like : "product1, product1, product2" OR "product2, product2, product1". The selected product appear both instead of just being selected – Bypath

I'll upvote for your comment for sure. But it's not exactly the answer, see my comment below :) – Bypath

select_tag :type, options_for_select("<option value = 'produit1'>Produit1</option><option value = 'Produit2'>Produit2</option>", params[:product], selected: params[:product]), id: "different_option_value_html", onchange: "this.form.submit();", include_blank: "Which products?" – Clatter

>> wrong number of arguments (given 3, expected 1..2) – Bypath

Answer 1

I finally change the syntax and it works fine using :options_for_select(:collection, :selected)

So there is my code now :

= select_tag :product,  options_for_select(["Product1", "Product2"], params[:product]), id: "different_option_value_html", onchange: "this.form.submit();", include_blank: "Which product ?"

Bypath

Thank you soooo much. Browsed over 10 questions and resources before coming across your answer! – Bandwidth