Form Methods

Django · Methods reference

Django · Methods reference

📋 Overview

Django Form and ModelForm instance/class methods.

🔧 Methods

Form instance

Method	Description
`is_valid()`	Run validation; populates cleaned_data
`full_clean()`	Lower-level validation pipeline
`add_error(field, error)`	Attach non-field or field error
`has_error(field, code=…)`	Check errors present
`save(commit=True)`	ModelForm — save instance
`as_p()` / `as_table()` / `as_ul()`	HTML rendering helpers

Field widgets

API	Description
`clean_<fieldname>()`	Per-field validator hook
`clean()`	Cross-field validation
`Field.to_python(value)`	Convert to Python type

💡 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.

Forms

Field Lookups

Django · Methods reference

Model & Manager Methods

Django · Methods reference

On this page

📋 Overview 🔧 Methods Form instance Field widgets 💡 Examples ⚠️ Pitfalls 🔗 Related