<div class="upload-file-widget">
<h2>Dodaj nowy utwór</h2>
-<form action="/api/documents" method="POST" enctype="multipart/form-data">
+<form action="{% url file_upload %}" method="POST" enctype="multipart/form-data">
{{ bookform }}
<p><button type="submit">Dodaj książkę</button></p>
</form>