Migration from django-mptt

[claudep]

It would be so nice to find a "migrate from django-mptt" section in the docs!

[matthiask]

That's an excellent idea!

This is a related issue: feincms/feincms3#2

My current thinking is:

• Add a position field
• Set position = tree_id * 100000 + lft
• Ensure that the model has ordering = ["position"] set in its class Meta:
• Remove the MPTT fields

... and things should just work from there.

Now, I (or someone) should verify that this works and then write the docs for it.

[CoderMungan]

@matthiask hi, as i understand your idea i did it smth u can check #74.