django.contrib.admin.helpers ActionForm Example Code

ActionForm is a class within the django.contrib.admin.helpers module of the Django project. It is not typically used when creating applications but is sometimes used by libraries that want to extend the actions available within the Django Admin.

Example 1 from django-import-export

django-import-export (documentation and PyPI page) is a Django code library for importing and exporting data from the Django Admin. The tool supports many export and import formats such as CSV, JSON and YAML. django-import-export is open source under the BSD 2-Clause "Simplified" License.

django-import-export / import_export / forms.py

# forms.py
import os.path

from django import forms
from django.contrib.admin.helpers import ActionForm
from django.utils.translation import gettext_lazy as _


class ImportForm(forms.Form):
    import_file = forms.FileField(
        label=_('File to import')
        )
    input_format = forms.ChoiceField(
        label=_('Format'),
        choices=(),
        )

    def __init__(self, import_formats, *args, **kwargs):
        super().__init__(*args, **kwargs)
        choices = []
        for i, f in enumerate(import_formats):
            choices.append((str(i), f().get_title(),))
        if len(import_formats) > 1:
            choices.insert(0, ('', '---'))

        self.fields['input_format'].choices = choices


class ConfirmImportForm(forms.Form):


## ... source file abbreviated to get to ActionForm examples ...



    def clean_import_file_name(self):
        data = self.cleaned_data['import_file_name']
        data = os.path.basename(data)
        return data


class ExportForm(forms.Form):
    file_format = forms.ChoiceField(
        label=_('Format'),
        choices=(),
        )

    def __init__(self, formats, *args, **kwargs):
        super().__init__(*args, **kwargs)
        choices = []
        for i, f in enumerate(formats):
            choices.append((str(i), f().get_title(),))
        if len(formats) > 1:
            choices.insert(0, ('', '---'))

        self.fields['file_format'].choices = choices


def export_action_form_factory(formats):
    class _ExportActionForm(ActionForm):
        file_format = forms.ChoiceField(
            label=_('Format'), choices=formats, required=False)
    _ExportActionForm.__name__ = str('ExportActionForm')

    return _ExportActionForm



## ... source file continues with no further ActionForm examples...

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