wagtail/docs/advanced_topics/documents/custom_document_model.rst

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.. _custom_document_model:
=====================
Custom document model
=====================
An alternate ``Document`` model can be used to add custom behaviour and
additional fields.
You need to complete the following steps in your project to do this:
- Create a new document model that inherits from
``wagtail.documents.models.AbstractDocument``. This is where you would
add additional fields.
- Point ``WAGTAILDOCS_DOCUMENT_MODEL`` to the new model.
Here's an example:
.. code-block:: python
# models.py
from wagtail.documents.models import Document, AbstractDocument
class CustomDocument(AbstractDocument):
# Custom field example:
source = models.CharField(
max_length=255,
blank=True,
null=True
)
admin_form_fields = Document.admin_form_fields + (
# Add all custom fields names to make them appear in the form:
'source',
)
Then in your settings module:
.. code-block:: python
# Ensure that you replace app_label with the app you placed your custom
# model in.
WAGTAILDOCS_DOCUMENT_MODEL = 'app_label.CustomDocument'
.. topic:: Migrating from the builtin document model
When changing an existing site to use a custom document model, no documents
will be copied to the new model automatically. Copying old documents to the
new model would need to be done manually with a
:ref:`data migration <django:data-migrations>`.
Any templates that reference the builtin document model will still continue
to work as before.
Referring to the document model
===============================
.. module:: wagtail.documents
.. autofunction:: get_document_model
.. autofunction:: get_document_model_string