Adding words from form to url -

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so have little problem. have url this:

localhost/my/web/plan?dzien=1&mies=4&rok=2015

and it's form:

<form action = "{{ app.request.getrequesturi() }}" method = "get">     <div class="input_container">         <input type="text" id="country_id" name="produkt" onkeyup="autocomplet()">         <ul id="country_list_id"></ul>     </div>     <div>         <input type="submit" value="submit">     </div> </form>

when use it, url this:

localhost/my/web/plan?produkt=makaron

but want add &produkt=makaron old url, this:

localhost/my/web/plan?dzien=1&mies=4&rok=2015&produkt=makaron

somebody have idea how can this?

you can add current url paremeters form hidden input fields. 

<form action = "{{ app.request.getrequesturi() }}" method = "get">     <div class="input_container">         <input type="text" id="country_id" name="produkt" onkeyup="autocomplet()">         <ul id="country_list_id"></ul>     </div>     <div>         <input type="submit" value="submit">     </div>    <input type="hidden" name = "dzien" value = "{{//a stamemt value of url}}">   ..... </form>

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