i want company_name to be unique=True when company_is_deleted=False. Similarly when company_is_deleted=True then company_name to be unique=False. Where i am using soft delete means that i am just setting company_is_deleted=True and not deleting it from database table.
Company Model
class Company(models.Model):
company_name = models.CharField(max_length=20, unique=True) # Here
company_description = models.CharField(max_length=100)
company_address = models.CharField(max_length=100)
company_email = models.EmailField()
company_website = models.URLField()
company_phone = models.CharField(max_length=30)
company_monthly_payment = models.DecimalField(max_digits=5, decimal_places=2)
company_logo = models.ImageField(upload_to='company_logo', default='default_company.png',blank=True, null=True)
company_created = models.DateTimeField(auto_now_add=True)
company_is_deleted = models.BooleanField(default=False)
View.py
class CompanyCreateView(LoginRequiredMixin, generic.CreateView):
model = Company
fields = ['company_name', 'company_description', 'company_email',
'company_website', 'company_address', 'company_phone', 'company_status',
'company_monthly_payment', 'company_logo']
You can add that logic into save method. But remove unique from company_name field.
from django.db import IntegrityError
class Company(models.Model):
company_name = models.CharField(max_length=20)
company_description = models.CharField(max_length=100)
company_address = models.CharField(max_length=100)
company_email = models.EmailField()
company_website = models.URLField()
company_phone = models.CharField(max_length=30)
company_monthly_payment = models.DecimalField(max_digits=5, decimal_places=2)
company_logo = models.ImageField(upload_to='company_logo', default='default_company.png',blank=True, null=True)
company_created = models.DateTimeField(auto_now_add=True)
company_is_deleted = models.BooleanField(default=False)
def save(self, *args, **kwargs):
if not self.company_is_deleted and Company.objects.filter(
company_name=self.company_name,
company_is_deleted=False
).exists():
raise IntegrityError
super(Company, self).save(*args, **kwargs)
Related
I'm trying to acheive catgeory and product offers in my project and am unable to come up with a solution. Like if i give offer to a category all products price in category should get the offer and for products its individual.
class Category(models.Model):
category_name = models.CharField(max_length=15, unique=True)
slug = models.SlugField(max_length=100, unique=True)
class Meta:
verbose_name_plural = "Category"
class Products(models.Model):
category = models.ForeignKey(Category, on_delete=models.CASCADE)
product_name = models.CharField(max_length=50, unique=True)
slug = models.SlugField(max_length=100, unique=True)
description = models.TextField(max_length=500)
price = models.IntegerField()
images = models.ImageField(upload_to="photos/products")
images_two = models.ImageField(upload_to="photos/products")
images_three = models.ImageField(upload_to="photos/products")
stock = models.IntegerField()
is_available = models.BooleanField(default=True)
created_date = models.DateTimeField(auto_now_add=True)
modified_date = models.DateTimeField(auto_now_add=True)
class Meta:
verbose_name_plural = "Products"
def __str__(self):
return self.product_name
class CategoryOffer(models.Model):
category = models.OneToOneField(Category, on_delete=models.CASCADE, related_name='cat_offer')
valid_from = models.DateTimeField()
valid_to = models.DateTimeField()
discount = models.IntegerField(
validators=[MinValueValidator(1), MaxValueValidator(100)]
)
is_active = models.BooleanField(default=False)
def __str__(self):
return self.category.category_name
class ProductOffer(models.Model):
product = models.OneToOneField(Products, on_delete=models.CASCADE, related_name='pro_offer')
valid_from = models.DateTimeField()
valid_to = models.DateTimeField()
discount = models.IntegerField(
validators=[MinValueValidator(1), MaxValueValidator(100)]
)
is_active = models.BooleanField(default=False)
def __str__(self):
return self.product.product_name
So above are my models. I don't know how to implement, thought of many ways but it keeps leading to errors.
You are using separate models for Categoryoffer and Productoffer. Make an Offer model with the following field:
class Offer:
name = models.CharField()
valid_from = models.DateTimeField()
valid_to = models.DateTimeField()
discount = models.IntegerField(
validators=[
MinValueValidator(1),
MaxValueValidator(100)
])
is_active = models.BooleanField(default=False)
Now use the foreign key in your category and product models:
class Product:
offer = models.ForeignKey(Offer)
I have a create view (Loan_assetCreateView(generic.CreateView)) where I save if an asset is going to be loaned and when it will be returened in a model called Loan_asset(models.Model). Then I have the asset in a diffrent model Asset(model.Model). I would like to once I have saved my data in my Loan_assetCreateView(generic.CreateView) that is set the value in Asset.is_loaned to True. How can I do that?
My models.py:
class Asset(models.Model):
# Relationships
room = models.ForeignKey("asset_app.Room", on_delete=models.SET_NULL, blank=True, null=True)
model_hardware = models.ForeignKey("asset_app.Model_hardware", on_delete=models.SET_NULL, blank=True, null=True)
# Fields
name = models.CharField(max_length=30)
serial = models.CharField(max_length=30, unique=True, blank=True, null=True, default=None)
mac_address = models.CharField(max_length=30, null=True, blank=True)
purchased_date = models.DateField(null=True, blank=True)
may_be_loaned = models.BooleanField(default=False, blank=True, null=True)
is_loaned = models.BooleanField(default=False, blank=True, null=True)
missing = models.BooleanField(default=False, blank=True, null=True)
notes = HTMLField(default="")
ip = models.CharField(max_length=90, null=True, blank=True)
created = models.DateTimeField(auto_now_add=True, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
class Loan_asset(models.Model):
# Relationships
asset = models.ForeignKey("asset_app.Asset", on_delete=models.SET_NULL, blank=True, null=True)
loaner_type = models.ForeignKey("asset_app.Loaner_type", on_delete=models.SET_NULL, blank=True, null=True)
location = models.ForeignKey("asset_app.Locations", on_delete=models.SET_NULL, blank=True, null=True)
# Fields
loaner_name = models.CharField(max_length=60)
loaner_address = models.TextField(max_length=100, null=True, blank=True)
loaner_telephone_number = models.CharField(max_length=30)
loaner_email = models.EmailField()
loaner_quicklink = models.URLField(null=True, blank=True)
loan_date = models.DateField()
return_date = models.DateField()
notes = HTMLField(default="")
returned = models.BooleanField(default=False, blank=True, null=True)
created = models.DateTimeField(auto_now_add=True, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
class Meta:
pass
def __str__(self):
return str(self.loaner_name)
def get_absolute_url(self):
return reverse("asset_app_loan_asset_detail", args=(self.pk,))
def get_update_url(self):
return reverse("asset_app_loan_asset_update", args=(self.pk,))
my urls.py
`path("asset_app/loan_asset/create/", views.Loan_assetCreateView.as_view(), name="asset_app_loan_asset_create")`,
my views.py
class Loan_assetCreateView(generic.CreateView):
model = models.Loan_asset
form_class = forms.Loan_assetForm
Here are some options:
override form_valid method that's being called in post method implementation, so that after form will be validated (model instance saved), you'll be able to set the flag through foreign key/by creating Asset instance:
...
def form_valid(self, form):
self.object = form.save()
if self.object.asset:
self.object.asset.is_loaned = True
else:
self.object.asset = Asset.objects.create(is_loaned=True)
return HttpResponseRedirect(self.get_success_url())
use Django signals:
#receiver(post_save, sender=Loan_asset)
def create_transaction(sender, instance, created, **kwargs):
if created:
Asset.objects.create(is_loaned=True)
You can override the post method in your Loan_assetCreateView.
class Loan_assetCreateView(generic.CreateView):
model = models.Loan_asset
form_class = forms.Loan_assetForm
def post(request, *args, **kwargs):
response = super().post(request, *args. **kwargs)
# Do your thing
return response
I'm creaating an api that user can create a job. when I want to test it with postman and create a job I have this error:
IntegrityError at /job/create/
NOT NULL constraint failed: core_job.category_id
how do i can fix it ?? I'm using generic CreateAPIView
models:
class Category(models.Model):
name = models.CharField(max_length=300)
slug = models.SlugField(max_length=300, unique=True, help_text='write in English.')
sub_category = models.ForeignKey('Category', null=True, blank=True, on_delete=models.CASCADE)
class Job(models.Model):
user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
name = models.CharField(max_length=400, unique=True)
slug = models.SlugField(max_length=400, unique=True, allow_unicode=True)
category = models.ForeignKey(Category, on_delete=models.DO_NOTHING)
image_1 = models.ImageField(upload_to='products_pic/%Y/%m/%d/', null=True, blank=True)
description = models.TextField(null=True, blank=True)
phone1 = models.CharField(max_length=12, null=True, blank=True)
phone2 = models.CharField(max_length=12, null=True, blank=True)
phase = models.CharField(max_length=1, null=True, blank=True)
address = models.TextField(null=True, blank=True)
daily_start_work_time = models.TimeField(null=True, blank=True)
daily_end_work_time = models.TimeField(null=True, blank=True)
create_date = models.DateTimeField(auto_now_add=True)
update_date = models.DateTimeField(auto_now=True)
active = models.BooleanField(default=False)
popular = models.BooleanField(default=False)
views:
class JobCreateView(generics.CreateAPIView):
permission_classes = (IsAuthenticated,)
serializer_class = JobSerializer
queryset = Job.objects.all()
serializers:
class CategorySerializer(serializers.ModelSerializer):
class Meta:
model = Category
fields = '__all__'
class JobSerializer(serializers.ModelSerializer):
category = serializers.SerializerMethodField()
class Meta:
model = Job
fields = '__all__'
lookup_field = 'slug'
extra_kwargs = {
'url': {'lookup_field': 'slug'}
}
def get_category(self, obj):
return obj.category.name
The category field is not populating with any value when you create the job. I mean category field is Null when you save that form. I am not sure but any way the problem is related to category field
I'm building a django app that has customers model and projects model and tasks model. in tasks model I can select the customer name and project but the problem is that in admin panel it shows all the projects, is there any way to show projects only for the selected customer
from django.db import models
from django.contrib.auth.models import User
from suppliers.models import Currency
from users.models import Profile
class Customer(models.Model):
customer_id = models.AutoField(primary_key=True)
customer_first_name = models.CharField(max_length=200)
customer_last_name = models.CharField(max_length=200)
company = models.CharField(max_length=200)
customer_phone = models.CharField(max_length=200)
customer_address = models.CharField(max_length=200)
email = models.EmailField(null=True, blank=True)
website = models.CharField(max_length=200, null=True, blank=True)
creation_date = models.DateTimeField(auto_now_add=True)
modified_date = models.DateTimeField(auto_now=True)
notes = models.TextField()
def __str__(self):
return str(self.customer_first_name) + ' ' + str(self.customer_last_name)
class Account(models.Model):
max_discount = models.DecimalField(max_digits=2, decimal_places=2)
credit_limit = models.DecimalField(max_digits=20, decimal_places=2)
customer = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True, blank=True)
currency = models.ForeignKey(Currency, on_delete=models.CASCADE)
sales_man = models.OneToOneField(User, on_delete=models.CASCADE)
Agent = models.OneToOneField(Profile, on_delete=models.CASCADE)
status = models.BooleanField(default=True)
reason = models.TextField()
class TaskPriority(models.Model):
priority_id = models.AutoField(primary_key=True)
task_priority_name = models.CharField(max_length=200)
def __str__(self):
return str(self.task_priority_name)
class Project(models.Model):
project_id = models.AutoField(primary_key=True)
project_name = models.CharField(max_length=200)
project_balance = models.DecimalField(max_digits=20, decimal_places=2)
customer_name = models.ForeignKey(Customer, on_delete=models.CASCADE)
creation_date = models.DateTimeField(auto_now_add=True)
modified_date = models.DateTimeField(auto_now=True)
notes = models.TextField()
def __str__(self):
return str(self.project_name)
class Task(models.Model):
task_id = models.AutoField(primary_key=True)
task_name = models.CharField(max_length=200)
customer_name = models.ForeignKey(Customer, on_delete=models.CASCADE, blank=True, null=True)
task_priority = models.ForeignKey(TaskPriority, on_delete=models.CASCADE)
employee = models.ForeignKey(Profile, on_delete=models.CASCADE)
creation_date = models.DateTimeField(auto_now_add=True)
modified_date = models.DateTimeField(auto_now=True)
project = models.ForeignKey(Project, null=True, blank=True, on_delete=models.CASCADE)
file_name = models.FileField(upload_to='projects_files')
notes = models.TextField()
def __str__(self):
return str(self.task_name)
You can use TabularInline to create project tab on customer record view in admin panel.
For example:
class ProjectInline(admin.TabularInline):
model = Project
extra = 1
verbose_name = 'Project'
verbose_name_plural = 'Projects'
list_display = ...
And in Customer Admin model add
class CustomerAdmin(admin.ModelAdmin):
...
inlines = (ProjectInline, )
I am using django rest framework wherein the model has composite primary key, one of the them being a foreign key.
models/TestSuite.py
class TestSuite(models.Model):
team_name = models.ForeignKey('Team', on_delete=models.DO_NOTHING, db_column='team_name')
suite_name = models.CharField(max_length=100)
description = models.CharField(max_length=200, blank=True, null=True)
schedule = models.CharField(max_length=100, blank=True, null=True)
email_list_ok = models.CharField(max_length=200, blank=True, null=True)
email_list_fail = models.CharField(max_length=200, blank=True, null=True)
template_name = models.ForeignKey('EmailTemplates', on_delete=models.DO_NOTHING, db_column='template_name')
class Meta:
managed = False
db_table = 'test_suite'
unique_together = (('team_name', 'suite_name'),)
models/Team.py
class Team(models.Model):
team_name = models.CharField(primary_key=True, max_length=30)
description = models.CharField(max_length=100, blank=True, null=True)
class Meta:
managed = False
db_table = 'team'
TestSuiteSerializer.py
class Meta:
model = models.TestSuite
fields = '__all__'
TestSuiteViewSet.py
class TestSuiteViewSet(viewsets.ModelViewSet):
queryset = models.TestSuite.objects.all()
serializer_class = serializers.TestSuiteSerializer
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data,
many=isinstance(request.data, list))
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data,
status=status.HTTP_201_CREATED, headers=headers)
Now when I do a post request, it throws below errors
When the post() has team_name already existing in team table
{
"team_name": [
"test suite with this team name already exists."
]
}
When the post() has team_name not existing in team table
Exception Type: ValueError
Exception Value:
Cannot assign "'dummy'": "TestSuite.team_name" must be a "Team" instance.
Can someone please help me here. I am assuming I am missing something.
The first argument to your foreign key fields should be the model itself, not a string of the model (eg. not 'Team', but Team - likewise for EmailTemplate)
class TestSuite(models.Model):
# Change this field's first argument from a string to the Team class
team_name = models.ForeignKey(Team, on_delete=models.DO_NOTHING, db_column='team_name')
suite_name = models.CharField(max_length=100)
description = models.CharField(max_length=200, blank=True, null=True)
schedule = models.CharField(max_length=100, blank=True, null=True)
email_list_ok = models.CharField(max_length=200, blank=True, null=True)
email_list_fail = models.CharField(max_length=200, blank=True, null=True)
# Change this field's first argument from a string to the EmailTemplates class
template_name = models.ForeignKey(EmailTemplates, on_delete=models.DO_NOTHING, db_column='template_name')
class Meta:
managed = False
db_table = 'test_suite'
unique_together = (('team_name', 'suite_name'),)