python - How to get overlapping objects in geodjango? -

i'm creating app using geodjango.
have model so:

class worldborder(models.model):     name = models.charfield(max_length=50)     mpoly = models.multipolygonfield() 

there can 2 or more objects overlapping borders in database.

how can determine if objects have overlapping borders?
how can queryset of objects overlapping borders?

thanks

you have 2 options, depending on want achieve:

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option 1: can use __overlaps lookup:

example of use:

an_mpoly = worldborder.objects.get(name='a_name').mpoly overlapping_mpolys = worldborder.objects.filter(mpoly__overlaps=an_mpoly) 

now overlapping_mpolys queryset, containing every worldborder object who's mpoly overlaps mpoly of worldborder object name='a_name'.

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option 2: if need object object overlap check, can utilize geos api overlaps method:

example of use:

mpoly_1 = worldborder.objects.get(name='name_1').mpoly mpoly_2 = worldborder.objects.get(name='name_2').mpoly  if mpoly_1.overlaps(mpoly_2):     print("{} , {} overlapping".format(mpoly_1, mpoly_2)) 

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