To export fixtures for the blog app, run the following command:
python manage.py dumpdata --natural-foreign --indent 2 -e contenttypes -e auth.permission -e wagtailcore.groupcollectionpermission -e wagtailcore.grouppagepermission -e wagtailimages.rendition -e sessions -e wagtail_vector_index.embedding > fixtures_data.json
To load fixtures, run the following command:
python manage.py loaddata fixtures_data.json