shipment = models.ForeignKey(
Shipment, on_delete=models.DO_NOTHING, null=True, blank=True)
specie/models.py
----------------
no reference to any other model
supplier/models.py
-------------------
specie = models.ManyToManyField(Specie)
Thanks for all the suggestions.
Well my friend, the only reason I have to do the imports is because each model is in it's own app. In every example I have seen the models are usually small and contained in one app.Perhaps I need to redesign my project to have everything lumped together?In my project I have an app for base, shipment, supplier, species, and user. Each app has its own rules of operations, meaning each has its own css, templates etc.I have looked at example until I am blue in the face but I cannot seem to get past the "cannot import name 'Supplier' from partially initialized module 'supplier.models' (most likely due to a circular import) (/Users/frankd/django" error.I'm not sure what the "partially initialized" is telling me.frank-On Wed, Jan 26, 2022 at 8:13 PM bnmng <benjamin@bnmng.com> wrote:Hi,You shouldn't have to import since the models are in the same models.py--On Wednesday, January 26, 2022 at 2:26:13 PM UTC-5 frank...@gmail.com wrote:After trying the suggestions I get these errors.supplier.models:
class Supplier(models.Model):
name = models.CharField(max_length=50)
phone = models.CharField(max_length=15, null=True, blank=True)
email = models.CharField(max_length=120, null=True, blank=True)
country = models.CharField(max_length=120, null=True, blank=True)
address = models.CharField(max_length=120, null=True, blank=True)
city = models.CharField(max_length=120, null=True, blank=True)
state = models.CharField(max_length=120, null=True, blank=True)
zipCode = models.CharField(max_length=10, null=True, blank=True)
def __str__(self):
return self.name
shipment.models:
----------------
from django.db import models
from specie.models import Specie
from supplier.models import Supplier
# Create your models here.
class Shipment(models.Model):
created = models.DateTimeField()
specie = models.ManyToManyField(Specie)
label = models.CharField(max_length=10)
received = models.PositiveIntegerField()
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)
supplier = models.ForeignKey(Supplier, on_delete=models.DO_NOTHING)
def __str__(self):
return self.supplier
class Meta:
ordering = ["label"]
def __str__(self):
return self.label
# =================================#
When I add the line supplier = models.ForeignKey(Supplier, on_delete=models.DO_NOTHING)
I get this error:
File "/Users/frankd/django_projects/Insectarium/src/shipment/models.py", line 4, in <module>
from supplier.models import Supplier
File "/Users/frankd/django_projects/Insectarium/src/supplier/models.py", line 3, in <module>
from shipment.models import Shipment
ImportError: cannot import name 'Shipment' from partially initialized module 'shipment.models' (most likely due to a circular import) (/Users/frankd/django_
specie.models:
--------------
from django.db import models
from django.utils import timezone
from ckeditor.fields import RichTextField
from shipment.models import Shipment
# Create your models here.
class Specie(models.Model):
scientific_name = models.CharField(max_length=50)
common_name = models.CharField(max_length=50, blank=True, null=True)
description = RichTextField(blank=True, null=True)
image = models.ImageField(
upload_to="specie/images/species", default="no_picture.png"
)
shipment = models.ManyToManyField(Shipment)
created = models.DateField(default=timezone.now)
def __str__(self):
return self.scientific_name
class Meta:
ordering = [
"scientific_name",
]
def __str__(self):
return self.scientific_name
# ====================== #
when I add the line shipment = models.ManyToManyField(Shipment)
I get this error.
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/Users/frankd/django_projects/Insectarium/src/shipment/models.py", line 3, in <module>
from specie.models import Specie
File "/Users/frankd/django_projects/Insectarium/src/specie/models.py", line 5, in <module>
from shipment.models import Shipment
ImportError: cannot import name 'Shipment' from partially initialized module 'shipment.models' (most likely due to a circular import) (/Users/frankd/django_
I think I tried this before but couldn't resolve these errors. Any suggestions would be appreciated.
frank-On Wed, Jan 26, 2022 at 10:53 AM frank dilorenzo <frank...@gmail.com> wrote:Thank you so much. Have a great day!frank-On Wed, Jan 26, 2022 at 6:51 AM bnmng <benj...@bnmng.com> wrote:I would start by defining Supplier in your models.py, then Shipment with a ForeignKey reference to Supplier
I'm assuming (forgive me if I'm wrong) that not only can a shipment have many species, but a species can be in many shipments, so if that's the case, the most obvious way is to go with ManyToMany for that relationship
https://docs.djangoproject.com/en/4.0/topics/db/examples/many_to_many/
class Supplier(models.Model):
(etc..etc..)
class Shipment(models.Model):
supplier = models.ForeignKey(
Supplier,
on_delete=models. (...etc.. etc...)
class Species(models.Model):
shipment = models.ManyToManyField(
Shipment,
(etc..)--On Monday, January 24, 2022 at 8:59:10 AM UTC-5 frank...@gmail.com wrote:I have tried several different ways but I cannot seem to get this right. What I have is a listof suppliers. Each supplier can have many shipments and each shipment can have many species. Seems simple enough but apparently I must be more simple.I need a suggestion of how to relate these table.a supplier can have many shipment. A shipment can have many species. Any help would be appreciated. Thanks.
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