Thank Mike. I am sorry for all this code but I am including it to show the
problem I can't resolve. I have 3 apps, shipment, supplier, specie. This
is the models for them.
from django.db import models
from .models import Shipment
from django.utils import timezone
# Create your models here.
# A specie can belong to many shipments
class Specie(models.Model):
shipment = models.ManyToManyField(Shipment)
name = models.CharField(max_length=120, null=True)
image = models.ImageField(upload_to="species", default="no_picture.png")
created = models.DateTimeField(default=timezone.now)
def __str__(self):
return self.name
===================
from django.db import models
from .models import Supplier
# Create your models here.
# A shipment can have many species
class Shipment(models.Model):
supplier = models.ForeignKey(Supplier, on_delete=models.CASCADE)
slabel = models.CharField(max_length=10)
received = models.PositiveIntegerField(default=0)
bad = models.PositiveIntegerField(default=0)
non = models.PositiveIntegerField(default=0)
doa = models.PositiveIntegerField(default=0)
para = models.PositiveIntegerField(default=0)
released = models.PositiveIntegerField(default=0)
entered = models.BooleanField(default=False)
created = models.DateTimeField(auto_now_add=True)
def __str__(self):
return f"{self.slabel}"
======================
from django.db import models
# Create your models here.
# Supplier can have many shipments
class Supplier(models.Model):
name = models.CharField(max_length=120, null=True)
phone = models.CharField(max_length=15, null=True)
email = models.CharField(max_length=120, null=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
def __str__(self):
return self.name
the error I can't resolve is:
ImportError: cannot import name 'Supplier' from partially initialized
module 'shipment.models' (most likely due to a circular import)
(/Users/frankd/django_projects/tryit/src/shipment/models.py)
thanks again.
On Thursday, June 3, 2021 at 10:47:07 PM UTC-5 Mike Dewhirst wrote:
> On 4/06/2021 1:39 pm, Mike Dewhirst wrote:
> > On 4/06/2021 11:34 am, frank dilorenzo wrote:
> >> I have the following conditions.
> >> A supplier can have many shipments.
> >> A shipment can have many species.
> >> A shipment can have only one supplier.
> >> Species can belong to many shipments.
> >
> > supplier 1:n shipment
> > shipment n:m species
>
> shipment has FK to supplier
>
> species has m2m field with shipment
>
> The latter implements a connecting table between species and shipment
> which can be expanded to carry additional information if you need to
> include anything related to a particular shipment + species
>
> In all this I refer to the word species in its singular sense. E.g., we
> are members of the human species.
>
>
> >
> >>
> >> No matter how I try I can't seem to configure the models correctly.
> >> I was hoping someone could help me on this.
> >>
> >> Thank you.
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> >
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