Getting started

django-import-export-extensions is based on django-import-export package, so it follows a similar workflow and interfaces. If you are already familiar with the original package, you can refer to the Migrate from original django-import-export package section to start using background import/export.

You can also consult the django-import-export documentation to learn how to work with import and export features.

There are simple examples to quickly get import/export functionality.

Django Model for tests

There is simple Django model from test app that we gonna use in the examples above.

from django.db import models


class Band(models.Model):

    title = models.CharField(
        max_length=100,
    )

    class Meta:
        verbose_name = _("Band")
        verbose_name_plural = _("Bands")

    def __str__(self) -> str:
        return self.title

Resources

The resource class is a core of import/export. It is similar to Django forms but provides methods for converting data between files and objects.

django-import-export-extensions provides two key classes: CeleryResource and CeleryModelResource. Below is an example of a simple model resource:

from import_export_extensions.resources import CeleryModelResource


class BandResource(CeleryModelResource):
    """Resource for `Band` model."""

    class Meta:
        model = Band
        fields = [
            "id",
            "title",
        ]

This resource class allows you to import/export data just like the original package. However, to perform imports/exports in the background, you need to create ImportJob and ExportJob objects.

The resource classes have been modified to interact with Celery, but the overall workflow remains the same. For more details, refer to the Resources and Import data workflow sections of the base package documentation.

Job Models

The package provides the ImportJob and ExportJob models, which are at the core of background import/export functionality. These models store the parameters and results of the import/export process. Once you create an instance of one of these classes, the Celery task is triggered, and the import/export process begins.

Example of creation:

from import_export_extensions import models
from . import resources

file_format_path = "import_export.formats.base_formats.CSV"
import_file = "files/import_file.csv"

# Start import job
import_job = models.ImportJob.objects.create(
    resource_path=resources.BandResource.class_path,
    data_file=import_file,
    resource_kwargs={},
)

# Start export job
export_job = models.ExportJob.objects.create(
    resource_path=resources.BandResource.class_path,
    file_format_path=file_format_path,
    resource_kwargs={}
)

print(import_job.import_status, export_job.export_status)  # CREATED CREATED

These models are also registered in the Django Admin, allowing you to view all information about the created jobs directly from the admin interface.

Signals

The package provides signals export_job_failed and import_job_failed. You can use them to handle errors that happened during job.

Example

signals.py

import logging

from django import dispatch

from import_export_extensions.models.core import BaseJob
from import_export_extensions.signals import (
    export_job_failed,
    import_job_failed,
)


@dispatch.receiver(export_job_failed)
@dispatch.receiver(import_job_failed)
def job_error_hook(
    sender,
    instance: BaseJob,
    error_message: str,
    traceback: str,
    exception: Exception | None,
    **kwargs,
):
    """Present an example of job error hook."""
    logging.getLogger(__file__).warning(f"{instance}, {error_message}")

Admin models

To perform import/export operations using Celery through Django Admin, use the CeleryImportExportMixin in your admin model and set the resource_classes class attribute.

admin.py

from import_export_extensions.admin import CeleryImportExportMixin
from . import resources
from . import models


@admin.register(models.Band)
class BandAdmin(CeleryImportExportMixin, admin.ModelAdmin):
    """Admin for `Band` model with import export functionality."""
    list_display = (
        "title",
    )
    resource_classes = [resources.BandResource]

There are also the CeleryImportAdminMixin and CeleryExportAdminMixin mixins available if you need to perform only one operation (import or export) in the admin. All of these mixins add a status page, where you can monitor the progress of the import/export process:

Import/Export API

The api.views.ExportJobViewSet and api.views.ImportJobViewSet are provided to create the corresponding viewsets for the resource.

views.py

from import_export_extensions.api import views
from . import resources


class BandExportViewSet(views.ExportJobViewSet):
    """Simple ViewSet for exporting `Band` model."""
    resource_class = resources.BandResource


class BandImportViewSet(views.ImportJobViewSet):
    """Simple ViewSet for importing `Band` model."""
    resource_class = resources.BandResource

These viewsets provide the following actions to manage ImportJob/ExportJob objects:

• list - Returns a list of jobs for the resource_class set in ViewSet
• retrieve - Returns details of a job based on the provided ID
• start - Creates a job object and starts the import/export process
• cancel - Stops the import/export process and sets the job\'s status to CANCELLED.
• confirm - Confirms the import after the parse stage. This action is available only in ImportJobViewSet.

Additionally, there is drf_spectacular integration. If you have this package configured, the OpenAPI specification will be available.

Import/Export API actions mixins

Alternatively you can use api.mixins.ExportStartActionMixin and api.mixins.ImportStartActionMixin to add to your current viewsets ability to create import/export jobs. You would also need to use api.views.BaseExportJobViewSet or BaseExportJobForUsersViewSet and api.views.BaseImportJobViewSet or BaseImportJobForUsersViewSet to setup endpoints to be able to:

• list - Returns a list of jobs for the resource_class set in ViewSet.
• retrieve - Returns details of a job based on the provided ID.
• cancel - Stops the import/export process and sets the job\'s status to CANCELLED.
• confirm - Confirms the import after the parse stage. This action is available only in import jobs.