django template child data in nested loop
{% for x in model1 %}
<p> {{ x.col1 }} </p>
{% for y in x.model2_set.all %}
<p> {{ y.col2 }} </p>
{% for z in y.model3_set.all %}
<p> {{ z.col3 }} </p>
{% endfor %}
{% endfor %}
{% endfor %}