如何使用 GISModelAdmin 为管理页面设置 default_lon、default_lat

Question

如何使用 GISModelAdmin 类在 django 管理页面中为 PointField 设置 default_lon、default_lat 和 default_zoom？

使用以下代码可以正确加载管理页面，但默认位置在欧洲。

模型.py

from django.contrib.gis.db import models
class Enclosure(models.Model):
    location = models.PointField()
    name = models.CharField(max_length=15)

admin.py

from .models import Enclosure
@admin.register(Enclosure)
class EnclocusreAdmin(GISModelAdmin):
    pass

我尝试了以下代码来尝试为小部件设置默认纬度、经度。但是，这样做会导致管理页面上的 PointField 没有显示地图。

admin.py

from .models import Enclosure
@admin.register(Enclosuer)
class EnclosureAdmin(GISModelAdmin):
    gis_widget_kwargs = {
        'attrs': {
            'default_lon': 40.383546,
            'default_lat': -111.774973,
        }
    }

相关的Django代码是

class GISModelAdmin(GeoModelAdminMixin, ModelAdmin):
    pass

class GeoModelAdminMixin:
    gis_widget = OSMWidget
    gis_widget_kwargs = {}

    def formfield_for_dbfield(self, db_field, request, **kwargs):
        if (
            isinstance(db_field, models.GeometryField) and
            (db_field.dim < 3 or self.gis_widget.supports_3d)
        ):
            kwargs['widget'] = self.gis_widget(**self.gis_widget_kwargs)
            return db_field.formfield(**kwargs)
        else:
            return super().formfield_for_dbfield(db_field, request, **kwargs)

class OSMWidget(OpenLayersWidget):
    """
    An OpenLayers/OpenStreetMap-based widget.
    """
    template_name = 'gis/openlayers-osm.html'
    default_lon = 5
    default_lat = 47
    default_zoom = 12

    def __init__(self, attrs=None):
        super().__init__()
        for key in ('default_lon', 'default_lat', 'default_zoom'):
            self.attrs[key] = getattr(self, key)
        if attrs:
            self.attrs.update(attrs)

Answer 1

子类化GISModelAdmin 似乎有效：在admin.py

from django.contrib.gis import admin
from .models import Enclosure

class CustomGeoWidgetAdmin(admin.GISModelAdmin):
    gis_widget_kwargs = {
        'attrs': {
            'default_zoom': 11,
            'default_lon': 10,
            'default_lat': 43,
        },
    }

@admin.register(Enclosure)
class EnclosureAdmin(CustomGeoWidgetAdmin):
    pass