#30795: Django cannot serialize value into migration file
-------------------------------------+-------------------------------------
Reporter: | Owner: nobody
SebaRossi94 |
Type: Bug | Status: new
Component: Core | Version: 2.2
(Serialization) | Keywords: Serialize,
Severity: Normal | makemigrations, migrate
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Hi there i'm having problems when trying to use the command makemigrations
with manage.py. The output is the following:
{{{
Migrations for 'reg':
reg\migrations\0012_auto_20190917_1711.py
- Remove field Products from tenant
- Add field products to tenant
- Alter field productos on preaprobado
- Alter field tenant_id on preaprobado
- Alter field CMS_id on producto
- Alter field CMS_id on tenant
}}}
**Traceback errors**
{{{
ValueError: Cannot serialize: <Producto: Basico - ['IPTEL', 'Rocstar',
'Test_DVT']>
There are some values Django cannot serialize into migration files.
For more, see https://docs.djangoproject.com/en/2.2/topics/migrations
/#migration-serializing
}}}
The thing is that the entire app works just fine but for some reason i
can't understand i cannot migrate the db.
Here is the models.py:
{{{
class Tenant(models.Model):
Name = models.CharField(max_length = 30, unique = True)
Enabled = models.BooleanField(default = False)
CMS_id = models.PositiveIntegerField(unique = True)
Logo = models.ImageField(upload_to = "Logos/", blank = True)
Icon = models.ImageField(upload_to = "Icons/", blank = True)
Domain = models.URLField(default = "http://localhost:8000";)
Master = models.BooleanField(default = False)
products = models.ManyToManyField(Producto, related_name = "tenants")
def __str__(self):
return(self.Name)
# Override del metodo que salva en la db para que si se quiere salvar un
Tenant con Master = True y
# existe un Tenant con mismo dominio y Master = True no pueda salvar
def save(self, *args, **kwargs):
#busca tenant con mismo dominio y Master = True
try:
master_tenant = Tenant.objects.filter(Domain =
self.Domain).get(Master = True)
#Si el tenant encontrado es el que se quiere salvar chequeo
que sea Master = True y salvo
#sino pido Master = True. Chequea tambien que el master tenga
logo e icono si o si
if master_tenant.id == self.id:
if self.Master:
if self.Logo != "" and self.Icon != "":
super(Tenant, self).save(*args, **kwargs)
else:
raise ValidationError({"Logo" : "Logo required",
"Icon" : "Icon rquired"})
else:
raise ValidationError({"Master" : "At least one Master
per Domain"})
else:
#Si no es el Master = True del dominio y Master = False
guarda, sino error
if self.Master:
if self.Logo != "" and self.Icon != "":
super(Tenant, self).save(*args, **kwargs)
else:
raise ValidationError({"Logo" : "Logo required",
"Icon" : "Icon rquired"})
else:
super(Tenant, self).save(*args, **kwargs)
#Si no existe tenant con mismo Domain y Master = True, Se fija que
Master = True y que tenga logo e icono y salva, sino, error
except Tenant.DoesNotExist:
if self.Master:
if self.Logo != "" and self.Icon != "":
super(Tenant, self).save(*args, **kwargs)
else:
raise ValidationError({"Logo" : "Logo required",
"Icon" : "Icon rquired"})
else:
raise ValidationError({"Master" : "At least one Master per
Domain"})
class Preaprobado(models.Model):
codigo = models.CharField(max_length = 100)
tenant_id = models.ForeignKey(Tenant, on_delete = models.CASCADE,
related_name = "tenant")
can_register = models.BooleanField(default = True)
is_registered = models.BooleanField(default = False)
productos = models.ManyToManyField(Producto, related_name =
"preaprobados", default = Producto.objects.get(id = 1))
def __str__(self):
return(self.codigo + "-" + self.tenant_id.Name)
class Meta():
#No permite un par codigo-tenant repetido dentro del modelo
Preaprobado
constraints = [
models.UniqueConstraint(fields = ["codigo", "tenant_id"], name =
"par código-Tenant únicos"),
]
}}}
Any help is welcomed since i actually can't find what is wrong with the
code. Not even in the documentation. I'm new with Django so maybe the
solution is pretty easy but i can't find it.
--
Ticket URL: <https://code.djangoproject.com/ticket/30795>
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