class NullBooleanField(**options) [source] Like a BooleanField, but allows NULL as one of the options. Use this instead of a BooleanField with null=True. The default form widget for this field is a NullBooleanSelect.

Overview In general, GeoDjango installation requires: Python and Django Spatial database Installing Geospatial libraries Details for each of the requirements and installation instructions are provided in the sections below. In addition, platform-specific instructions are available for: Mac OS X Windows Use the Source Because GeoDjango takes advantage of the latest in the open source geospatial software technology, recent versions of the libraries are necessary. If binary packages aren’t av

This document explains how to output PDF files dynamically using Django views. This is made possible by the excellent, open-source ReportLab Python PDF library. The advantage of generating PDF files dynamically is that you can create customized PDFs for different purposes – say, for different users or different pieces of content. For example, Django was used at kusports.com to generate customized, printer-friendly NCAA tournament brackets, as PDF files, for people participating in a March Madne

class Envelope(expression, **extra) Availability: MySQL, PostGIS, SpatiaLite Accepts a single geographic field or expression and returns the geometry representing the bounding box of the geometry.

class AlterIndexTogether(name, index_together) [source] Changes the model’s set of custom indexes (the index_together option on the Meta subclass).

as_vendorname(self, compiler, connection) Works like as_sql() method. When an expression is compiled by compiler.compile(), Django will first try to call as_vendorname(), where vendorname is the vendor name of the backend used for executing the query. The vendorname is one of postgresql, oracle, sqlite, or mysql for Django’s built-in backends.

BaseCommand.can_import_settings A boolean indicating whether the command needs to be able to import Django settings; if True, execute() will verify that this is possible before proceeding. Default value is True.

ModelAdmin.actions_on_bottom Controls where on the page the actions bar appears. By default, the admin changelist displays actions at the top of the page (actions_on_top = True; actions_on_bottom = False).

url_name The name of the URL pattern that matches the URL.

FileUploadHandler.upload_complete() [source] Callback signaling that the entire upload (all files) has completed.