How to round a Geodjango Distance

Question

In Django 1.9 / Python 2.7, I have the following view:

qs = ThePlace.objects.filter(lnglat__distance_lte=(lnglat, D(km=30))).distance(lnglat).order_by('distance')

In my template, I display the distances when I loop over the objects:

{% for qsplace in qs %}
    {{ qsplace.distance }}
{% endfor %}

which displays "25.717617095 m" for example.

I would like to display rounded figures (26 m). If more than 1 km, I would like to display 3 km for example

I have developed a first templatetag to round the figures:

from django import template
register = template.Library()

@register.filter
def dividebyth(value):
    print(type(value))
    value = round(value, 2)
    return value

And put in my template: {{ qsplace.distance|dividebyth }}

which results in the following error:

TypeError: a float is required

It seems I cannot round a Distance object.

Any way to manage that ?

Thank you!

Answer 1

From docs :

Because the distance attribute is a Distance object, you can easily express the value in the units of your choice. For example, city.distance.mi is the distance value in miles and city.distance.km is the distance value in kilometers.

To get distance value as float in meters try this: {{ qsplace.distance.m|dividebyth }}