Hello everyone,
I'm a beginner in coding and i choose python, like my favorite.
I am interresting myself to python frameworks, and technologies, and I'm
trying to have knoweldge in web develoment through django;
But, recently i have some error of migration in my django project that i
cannot fix;
When i try to make migrations i have this error:
ValueError: Cannot serialize:
<django.db.models.query_utils.DeferredAttribute object at
0x000001885B094160>
There are some values Django cannot serialize into migration files.
For more, see
https://docs.djangoproject.com/en/2.2/topics/migrations/#migration-serializing
please i want some person to help me about this, i have somme challenge and
this error make me late;
Thanks
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from django.db import models
from django.db.models.query_utils import DeferredAttribute
# Create your models here.
class Sexe(models.Model):
genre = models.CharField(max_length=10)
abreviation = models.CharField(max_length=1)
def __unicode__(self):
return self.abreviation
class Activite(models.Model):
nom_domaine = models.CharField(max_length=100)
description = models.TextField()
def __unicode__(self):
return self.nom_domaine
class Personne(models.Model):
# Informations basiques concernants l'utilisateur
nom = models.CharField(max_length=30)
prenom = models.CharField(max_length=30)
pseudo = models.CharField(max_length=10, null=True)
date_de_naissance = models.DateField()
sexe = models.OneToOneField(Sexe, on_delete=models.SET(Sexe.abreviation))
# Information supplementaires
telephone = models.CharField(max_length=20)
profession = models.CharField(max_length=30)
domaine_activite = models.ForeignKey(Activite, on_delete=models.SET(str(Activite.nom_domaine)))
# Informations de connection au compte
email = models.EmailField()
mot_de_passe = models.CharField(max_length=255)
# Details par rapport l'activté sur le compte de la personne
amis = models.ManyToManyField('self', null=True)
def __unicode__(self):
return str(self.nom) + " " + str(self.prenom)
class Message(models.Model):
destinateur = models.ForeignKey(Personne, related_name="sender",
on_delete=models.SET(str(Personne.nom)+"..."+str(Personne.prenom)), blank=True,
null=False)
destinataire = models.ForeignKey(Personne,
on_delete=models.SET(str(Personne.nom)+"..."+str(Personne.prenom)), blank=False,
null=False)
contenu = models.TextField()
date_envoi = models.DateField(auto_now=True)
def __unicode__(self):
if self.contenu > 20:
return str(self.destinateur) + "; " + str(self.contenu[:19]) + "..."
else:
return str(self.destinateur) + "; " + str(self.contenu)
class Publication(models.Model):
auteur = models.ForeignKey(Personne, on_delete=models.SET(str(Personne.nom)+"..."+str(Personne.prenom)))
contenu = models.TextField(null=False)
image_attache = models.ImageField(null=True)
def __unicode__(self):
if self.contenu > 20:
return str(self.destinateur) + "; " + str(self.contenu[:19]) + "..."
else:
return str(self.destinateur) + "; " + str(self.contenu)
class Profil(models.Model):
user = models.OneToOneField(Personne, on_delete=models.SET(str(Personne.nom)+"..."+str(Personne.prenom)))
photo_de_profil = models.ImageField()
def __unicode__(self):
return str(self.user.nom) + " " + str(self.user.prenom)
class ProfilImage(models.Model):
profil = models.OneToOneField(Profil, on_delete= models.CASCADE)
image = models.ImageField(upload_to='WesBox/images/')
featured = models.BooleanField(default=False)
thumbnail = models.BooleanField(default=False)
active = models.BooleanField(default=True)
updated = models.DateTimeField(auto_now_add=False, auto_now=True)
