Problem with update - duplicate childs

[beda-software]

Problem with update - duplicate childs

[ruscoder]

Hello @Martin317!
Could you please share the request data you are passing to the serializer?

[Martin317]

Sure, https://pastebin.com/rqC4YP79
I created signals to print the behavior. pre_save and post_save always print that is a new object.

# Padre objects (mama and papa) are duplicating the objects because I remove `read_only:False`.
Padre PRE SAVE TestNom, TestAp PK None   
Padre POST SAVE TestNom, TestAp CREATED True
Padre PRE SAVE TestNom2, TestAp2 PK None
Padre POST SAVE TestNom2, TestAp2 CREATED True
# EstudianteNivelSecundario raise Integrity Error, duplicate primary key. it has `read_only:False`.
EstudianteNivelSecundario PRE SAVE TestNom3, TestAp3 PK None

I forgot to share EstudianteNivelSecundario Model, here is.

 class EstudianteNivelSecundario(Persona):
    papa = models.ForeignKey(Padre,
                             on_delete=models.PROTECT,
                             related_name="estudiantes_nivel_secundario_papa",
                             blank=True,
                             null=True)
    mama = models.ForeignKey(Padre,
                             on_delete=models.PROTECT,
                             related_name="estudiantes_nivel_secundario_mama",
                             blank=True,
                             null=True)