detail.html

<img src="{{ album.album_logo }}" height="42" width="42">

<h1>{{ album.album_title }}</h1>
<h2>{{ album.artist }}</h2>

<!-- <ul>
    {% for song in album.song_set.all %}
        <li>{{ song.song_title }} - {{ song.file_type }}</li>
    {% endfor %}
</ul> -->

{% if error_message %}
    <p><strong>{{ error_message }}</strong></p>
{% endif %}

<form action="{% url 'music:favorite' album.id %}" method="post">
    {% csrf_token %}
    {% for song in album.song_set.all %}
        <input type="radio" id="song{{ forloop.counter }}" name="song" value="{{ song.id }}"> <!-- auto-incremented each time it prints a song -->
        <label for="song{{ forloop.counter }}">
            {{ song.song_title }}
            {% if song.is_favorite %}
                <img src="http://grumpygaycritic.co.uk/wp-content/uploads/2015/06/Crystal_Clear_action_bookmark.png" height="16" width="16">
            {% endif %}
        </label><br>
    {% endfor %}
    <input type="submit" value="Favorite">
</form>