Topic guide Formsets Dealing with ordering and deletion of forms

BaseFormSet.can_delete Default: False Lets you create a formset with the ability to select forms for deletion: Similar to can_order this adds a new field to each form named DELETE and is a forms.BooleanField.

Reference Widgets Built-in widgetsComposite widgets

classSelectDateWidget[source] : - template_name: 'django/forms/widgets/select_date.html'

FAQ FAQ: Databases and models

Make sure your Django DEBUG setting is set to True. Then do this: connection.queries is only available if DEBUG is True. It’s a list of dictionaries in order of query execution.

Internals Organization of the Django Project Steering council

The steering council is a group of experienced contributors who: provide oversight of Django’s development and release process, assist in setting the direction of feature development and releases, select Mergers and Releasers, and have a tie-breaking vote when other decision-making …

Reference

The basic workflow of Django’s admin is, in a nutshell, “select an object, then change it.” This works well for a majority of use cases.

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box is strictly to the left of the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box is strictly to the right of the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Bilateral) Tests if the geometry field’s bounding box overlaps or is to the left of the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Bilateral) Tests if the geometry field’s bounding box overlaps or is to the right of the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box overlaps or is above the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box overlaps or is below the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box is strictly above the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GIS QuerySet API Reference Spatial Lookups

Availability: PostGIS, PGRaster (Conversion) Tests if the geometry field’s bounding box is strictly below the lookup geometry’s bounding box. Example: PostGIS equivalent:

Reference GeoDjango Installation Platform-specific instructionsWindows

From within the Stack Builder (to run outside of the installer, Start ‣ PostgreSQL 15 ‣ Application Stack Builder), select PostgreSQL 15 (x64) on port 5432 from the drop down menu and click next.

Reference PostgreSQL specific database constraints ExclusionConstraint

ExclusionConstraint.include A list or tuple of the names of the fields to be included in the covering exclusion constraint as non-key columns.

Reference Databases Oracle notes

The Oracle backend stores each TextField as an NCLOB column. Oracle imposes some limitations on the usage of such LOB columns in general: LOB columns may not be used as primary keys. LOB columns may not be used in indexes.

Reference Form fields Built-in Field classes

classTypedChoiceField(**kwargs)[source] : Just like a ChoiceField, except TypedChoiceField takes two extra arguments, coerce and empty_value.

Reference Widgets Base widget classes

Here’s an example widget which subclasses [`MultiWidget`](#django.forms.MultiWidget) to display a date with the day, month, and year in different select boxes.

Reference Widgets Built-in widgetsSelector and checkbox widgets

classRadioSelect[source] : - template_name: 'django/forms/widgets/radio.html' - option_template_name: 'django/forms/widgets/radio_option.html'

Reference Conditional Expressions Advanced queries

When a conditional expression returns a boolean value, it is possible to use it directly in filters.