Model & Manager Methods

Django · Methods reference

Django · Methods reference

📋 Overview

Model instance methods and default/custom managers.

🔧 Methods

Model instance

Method	Description
`save(force_insert?, force_update?, …)`	Persist to DB
`delete()`	Remove row; returns (count, details)
`refresh_from_db(fields=…)`	Reload from database
`full_clean(exclude=…)`	Run validators + field checks
`get_FOO_display()`	Human label for choices field FOO
`get_absolute_url()`	Canonical URL (if defined)

Manager / QuerySet entry

API	Description
`Model.objects`	Default manager
`Model.objects.all()`	Starting queryset
Custom `Manager` / `QuerySet.as_manager()`	Custom chain methods
`Meta: default_manager_name`	Which manager is `_default_manager`

💡 Examples

See parent topic notes for runnable snippets; this page is the complete method index.

⚠️ Pitfalls

Mutating methods return None in Python — do not chain sort() / reverse() expecting a new list.
Default JS sort() compares strings — pass (a,b) => a-b for numbers.
SQL function names differ by dialect — verify Postgres vs MySQL docs.
Django QuerySet.update() skips save() signals and auto auto_now fields on models.

Form Methods

Django · Methods reference

QuerySet Methods

Django · Methods reference

On this page

📋 Overview 🔧 Methods Model instance Manager / QuerySet entry 💡 Examples ⚠️ Pitfalls 🔗 Related