As LDFlex have some issues with performances, we could try to help it handling datas by raising depth of our models.

For testing, we have to use the currently-in-dev version of sib-core (branch bugfix/performances-ldflex, may be published soon)

Questions are:

• Should we set default depth of djangoldp higher than 0? That could mean that we don't have to change our models but only djangoldp to make it works.
• Decide which depth by model? More than 1 could give some redundancy: [0] Circle -> [1] Owner (User) -> [2] Circles (Circle)

@balessan @sylvain @christophehenry