Django: What are the best practices to migrate a project from sqlite to PostgreSQL

Question

I need to migrate a complex project from sqlite to PostgreSQL. A lot of people seems to have problem with foreign keys, data truncature and so on...

• Is there a

Answer 1

The following is a refinement of Nimo's answer and Stephen's answer for Django 1.7+:

1. ./manage.py dumpdata --natural-primary --natural-foreign > dump.json
2. Change DATABASES in settings.py to point to the new (PostgreSQL) db.
3. ./manage.py migrate
4. ./manage.py loaddata dump.json

One problem I encountered is that SQLite doesn't seem to actually enforce the maximum length for CharFields. In my case, this made the loaddata step fail. I was able to find (and delete) model instances with too long CharField values via:

MyModel.objects.extra(where=["LENGTH(text) > 20"]).delete()

Once I did this before step 1. above, everything worked.