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turn abstract models into mixins

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This commit is contained in:
Laura Klünder 2017-05-08 16:40:22 +02:00
parent 9e79ca74ae
commit 963694395e
8 changed files with 33 additions and 87 deletions
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33
src/c3nav/mapdata/models/geometry/section.py
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@ -1,41 +1,25 @@
from collections import OrderedDict
from django.db import models
from django.utils.translation import ugettext_lazy as _
from c3nav.mapdata.fields import GeometryField
from c3nav.mapdata.models.geometry.base import GeometryFeature, GeometryFeatureBase
from c3nav.mapdata.models.geometry.base import GeometryMixin
LEVEL_FEATURE_TYPES = OrderedDict()
class SectionFeatureBase(GeometryFeatureBase):
def __new__(mcs, name, bases, attrs):
cls = super().__new__(mcs, name, bases, attrs)
if not cls._meta.abstract:
LEVEL_FEATURE_TYPES[name.lower()] = cls
return cls
class SectionFeature(GeometryFeature, metaclass=SectionFeatureBase):
"""
a map feature that has a geometry and belongs to a section
"""
section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
class Meta:
abstract = True
class SectionGeometryMixin(GeometryMixin):
def get_geojson_properties(self):
result = super().get_geojson_properties()
result['section'] = self.section.id
return result
class Building(SectionFeature):
class Building(SectionGeometryMixin, models.Model):
"""
The outline of a building on a specific level
"""
section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
geometry = GeometryField('polygon')
class Meta:
@ -44,10 +28,11 @@ class Building(SectionFeature):
default_related_name = 'buildings'
class Space(SectionFeature):
class Space(SectionGeometryMixin, models.Model):
"""
An accessible space. Shouldn't overlap.
"""
section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
geometry = GeometryField('polygon')
CATEGORIES = (
@ -79,10 +64,11 @@ class Space(SectionFeature):
return result
class Door(SectionFeature):
class Door(SectionGeometryMixin, models.Model):
"""
A connection between two rooms
"""
section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
geometry = GeometryField('polygon')
class Meta:
@ -91,10 +77,11 @@ class Door(SectionFeature):
default_related_name = 'doors'
class Hole(SectionFeature):
class Hole(SectionGeometryMixin, models.Model):
"""
A hole in the ground of a room, e.g. for stairs.
"""
section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
geometry = GeometryField('polygon')
class Meta: