79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
from django.apps import apps
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from django.contrib.gis.db.models import GeometryField
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from django.contrib.sitemaps import Sitemap
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from django.db import models
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from django.urls import reverse
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class KMLSitemap(Sitemap):
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"""
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A minimal hook to produce KML sitemaps.
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"""
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geo_format = "kml"
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def __init__(self, locations=None):
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# If no locations specified, then we try to build for
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# every model in installed applications.
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self.locations = self._build_kml_sources(locations)
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def _build_kml_sources(self, sources):
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"""
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Go through the given sources and return a 3-tuple of the application
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label, module name, and field name of every GeometryField encountered
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in the sources.
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If no sources are provided, then all models.
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"""
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kml_sources = []
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if sources is None:
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sources = apps.get_models()
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for source in sources:
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if isinstance(source, models.base.ModelBase):
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for field in source._meta.fields:
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if isinstance(field, GeometryField):
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kml_sources.append(
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(
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source._meta.app_label,
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source._meta.model_name,
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field.name,
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)
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)
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elif isinstance(source, (list, tuple)):
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if len(source) != 3:
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raise ValueError(
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"Must specify a 3-tuple of (app_label, module_name, "
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"field_name)."
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)
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kml_sources.append(source)
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else:
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raise TypeError("KML Sources must be a model or a 3-tuple.")
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return kml_sources
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def get_urls(self, page=1, site=None, protocol=None):
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"""
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This method is overridden so the appropriate `geo_format` attribute
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is placed on each URL element.
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"""
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urls = Sitemap.get_urls(self, page=page, site=site, protocol=protocol)
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for url in urls:
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url["geo_format"] = self.geo_format
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return urls
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def items(self):
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return self.locations
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def location(self, obj):
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return reverse(
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"django.contrib.gis.sitemaps.views.%s" % self.geo_format,
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kwargs={
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"label": obj[0],
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"model": obj[1],
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"field_name": obj[2],
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},
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)
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class KMZSitemap(KMLSitemap):
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geo_format = "kmz"
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