API Formulir GeoDjango

GeoDjango provides some specialized form fields and widgets in order to visually display and edit geolocalized data on a map. By default, they use OpenLayers-powered maps, with a base WMS layer provided by Metacarta.

Argumen bidang

In addition to the regular form field arguments, GeoDjango form fields take the following optional arguments.

srid

Field.srid

This is the SRID code that the field value should be transformed to. For example, if the map widget SRID is different from the SRID more generally used by your application or database, the field will automatically convert input values into that SRID.

geom_type

Field.geom_type

You generally shouldn’t have to set or change that attribute which should be setup depending on the field class. It matches the OpenGIS standard geometry name.

Kelas-kelas bidang formulir

GeometryField

class GeometryField[sumber]

PointField

class PointField[sumber]

LineStringField

class LineStringField[sumber]

PolygonField

class PolygonField[sumber]

MultiPointField

class MultiPointField[sumber]

MultiLineStringField

class MultiLineStringField[sumber]

MultiPolygonField

class MultiPolygonField[sumber]

GeometryCollectionField

class GeometryCollectionField[sumber]

Form widgets

GeoDjango form widgets allow you to display and edit geographic data on a visual map. Note that none of the currently available widgets supports 3D geometries, hence geometry fields will fallback using a simple Textarea widget for such data.

Widget attributes

GeoDjango widgets are template-based, so their attributes are mostly different from other Django widget attributes.

BaseGeometryWidget.geom_type

The OpenGIS geometry type, generally set by the form field.

BaseGeometryWidget.map_height
BaseGeometryWidget.map_width

Height and width of the widget map (default is 400x600).

BaseGeometryWidget.map_srid

SRID code used by the map (default is 4326).

BaseGeometryWidget.display_raw

Boolean value specifying if a textarea input showing the serialized representation of the current geometry is visible, mainly for debugging purposes (default is False).

BaseGeometryWidget.supports_3d

Indicates if the widget supports edition of 3D data (default is False).

BaseGeometryWidget.template_name

The template used to render the map widget.

You can pass widget attributes in the same manner that for any other Django widget. For example:

from django.contrib.gis import forms

class MyGeoForm(forms.Form):
    point = forms.PointField(widget=
        forms.OSMWidget(attrs={'map_width': 800, 'map_height': 500}))

Widget classes

BaseGeometryWidget

class BaseGeometryWidget

Ini adalah sebuah widget dasar jelas mengandung logika dibutuhkan oleh sub kelas. Anda tidak dapat secara langsung menggunakan widget ini untuk bidang geometri. Cata bahwa pembangunan dari widget GeoDjango berdasarkan pada sebuah cetakan, dicirikan oleh atribut kelas template_name.

OpenLayersWidget

class OpenLayersWidget

This is the default widget used by all GeoDjango form fields. template_name is gis/openlayers.html.

OpenLayersWidget dan OSMWidget menggunakan berkas openlayers.js ditempatkan pada situs jaringan openlayers.org. Ini bekerja untuk penggunaan dasar selama pengembangan, tetapi tidak sesuai untuk penyebaran produksi ketika openlayers.org/api/ tidak ada jaminan naik dan berjalan pada peladen lambat. Anda karena itu disarankan men subkelaskan widget ini untuk menentukan versi anda sendiri dari berkas openlayers.js di sifat js dari kelas Media sebelah dalam (lihat Assets as a static definition). Anda dapat menyimpan salinan dari openlayers.js tailored to your needs pada peladen anda sendiri atau mengacu ke salinan dari content-delivery network seperti https://cdnjs.com/. Ini akan juga mengizinkan anda melayani berkas JavaScript menggunakan protokol https jika dibutuhkan.

OSMWidget

class OSMWidget

This widget uses an OpenStreetMap base layer (Mapnik) to display geographic objects on. template_name is gis/openlayers-osm.html.

The OpenLayersWidget note about JavaScript file hosting above also applies here. See also this FAQ answer about https access to map tiles.