Utility function to retrieve all the editable field names of a model form

example.py

from utils import get_modelform_fields
from myapp.forms import MyModelForm

print(get_modelform_fields(MyModelForm))

utils.py

def get_modelform_fields(form_class):
    """
    Get the list of editable fields for a ModelForm.

    Args:
    form_class (Type[ModelForm]): The ModelForm class (not an instance)

    Returns:
    list: A list of field names that would appear in the form
    """
    # Get all model fields, excluding non-editable fields
    model_fields = set(
        field.name
        for field in form_class._meta.model._meta.get_fields()
        if not (field.auto_created) and getattr(field, "editable", True)
    )

    # Get explicitly excluded fields
    excluded_fields = (
        set(form_class._meta.exclude) if form_class._meta.exclude else set()
    )

    # Get fields that Django would automatically include
    default_fields = set(form_class.base_fields.keys())

    # Combine to get the final set of fields
    form_fields = (model_fields - excluded_fields) | default_fields

    return sorted(form_fields)