html - rails select_tag, how to generate dropdown list with json value and custom text from an array -

i'ved got json array , want create dropdown selection list. , because json, dont want display json based on readable name.

i tried 2 methods came closest, cant want.

controller:

@books = [{"code"=>"pa1","name"=>"james","type"=>"novel"},{"code"=>"pa2","name"=>"john","type"=>"science"}]  

method 1

form.html.erb:

<%= select "book", "book", @books.each_with_index.map {|name, index| [name,name["name"]]} %> 

the generated html:

<select id="book_book" name="book[book]"><option code="pa1" name="james" type="novel" value="james">james</option> <option code="pa2" name="john" type="science" value="john">john</option></select></div> 

method 2

form.html.erb:

<%= select_tag "book", options_for_select(@books) %>  

the generated html:

<select id="book" name="book"><option value="{&quot;code&quot;=&gt;&quot;pa1&quot;,&quot;name&quot;=&gt;&quot;james&quot;, &quot;type&quot;=&gt;&quot;novel&quot;}">{&quot;code&quot;=&gt;&quot;pa1&quot;, &quot;name&quot;=&gt;&quot;james&quot;, &quot;type&quot;=&gt;&quot;novel&quot;}</option><option value="{&quot;code&quot;=&gt;&quot;pa2&quot;, &quot;name&quot;=&gt;&quot;john&quot;, &quot;type&quot;=&gt;&quot;science&quot;}">{&quot;code&quot;=&gt;&quot;pa2&quot;, &quot;name&quot;=&gt;&quot;john&quot;, &quot;type&quot;=&gt;&quot;science&quot;}</option></select> </div>    

method 3 (update new method not working well)

even not work, there 2 different "value"! getting more frustrated.

@books = [{"value" => {"code"=>"pa1","name"=>"james","type"=>"novel"}},{"value" => {"code"=>"pa2","name"=>"john","type"=>"science"}}]   <%= select "book", "book", @books.each_with_index.map {|value, index| [value,value["value"]["name"]]} %></div>  <select id="book_book" name="book[book]"><option value="james" value="{&quot;code&quot;=&gt;&quot;pa1&quot;, &quot;name&quot;=&gt;&quot;james&quot;, &quot;type&quot;=&gt;&quot;novel&quot;}">james</option> <option value="john" value="{&quot;code&quot;=&gt;&quot;pa2&quot;, &quot;name&quot;=&gt;&quot;john&quot;, &quot;type&quot;=&gt;&quot;science&quot;}">john</option></select></div> 

this desired result want, please help!:

 <select id="book_book" name="book[book]"><option value="{"code"=>"pa1","name"=>"james","type"=>"novel"}">james</option> <option value="{"code"=>"pa2","name"=>"john","type"=>"science"}">john</option></select></div> 

i don't know why wanna pass whole hash string in value of <option> if want generate this

<select id="book_book" name="book[book]"><option value="{"code"=>"pa1","name"=>"james","type"=>"novel"}">james</option> <option value="{"code"=>"pa2","name"=>"john","type"=>"science"}">john</option></select></div> 

then should write following

<%= select("book", "book", @books.each.map {|hash| [hash['name'], hash.to_s] }) %></div>