I have written a view that let me store some datas in a database:
def save(request, product_id):
product = Product.objects.get(pk=product_id)
user = request.user
p = SavedProduct(username= user, product_off_id=product.off_id)
p.save()
This is my models:
class Product(models.Model):
name = models.CharField(max_length=2000)
off_id = models.BigIntegerField()
class SavedProduct(models.Model):
username = models.CharField(max_length=2000)
product_off_id = models.BigIntegerField()
It does the job but I am struggling to implement a OneToOneField to username and product_off_id.
I know product_off_id = models.BigIntegerField() should be product_off_id =models.OneToOneField(Product) but what should I pass in p=SavedProduct() for the product_off_id field?
if you want to do it with the OneToOneField it would be:
p = SavedProduct(username= user, product_off_id=product)
Related
Let us imagine that I have two models.
First model contains curse details and user that created this course
class Course(models.Model):
course_name = models.CharField(max_length=100, null=False)
description = models.CharField(max_length=255)
user_profile = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
and my second model is:
class Lesson(models.Model):
course = models.OneToOneField(Course, on_delete=models.CASCADE) #
# inside the course I want my APIVIEW to list only the courses that current user created.
# OnetoOne relationship does not solve the problem.
status = models.CharField(choices=STATUS, null=False, default=GOZLEMEDE,max_length=20)
tariffs = models.FloatField(max_length=5,null=False,default=0.00)
continues_off = models.CharField(max_length=2)
user_profile = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
My serializers for both Models:
class LessonSerializer(serializers.ModelSerializer):
class Meta:
model = models.Lesson
fields = ('course', 'status', 'tariffs', 'continues_off', 'user_profile')
def create(self, validated_data):
lesson = models.Lesson.objects.create(
course = validated_data['course'],
status = validated_data['status'],
tariffs=validated_data['tariffs'],
continues_off=validated_data['continues_off'],
user_profile=validated_data['user_profile']
)
return lesson
class CourseSerializer(serializers.ModelSerializer):
"""Serializers Course content"""
class Meta:
model = models.Course
fields = '__all__'
def create(self,validated_data):
course = models.Course.objects.create(
course_name = validated_data['course_name'],
description=validated_data['description'],
user_profile=validated_data['user_profile']
)
return course
My Viewset:
class LessonViewset(viewsets.ModelViewSet):
model = models.Lesson
serializer_class = serializers.LessonSerializer
authentication_classes = (SessionAuthentication,)
permission_classes = (IsAuthenticated,BasePermission,)
def get_queryset(self):
user_current = self.request.user.id
return models.Lesson.objects.filter(user_profile=user_current)
How can I get the desired result. I want to get the courses for the current user and show them as a dropdown list in my API view. Just only the courses that user created should be in the dropdown list not all.
OnetoOne relationship gives all results of course table.
i think change your view code to :
def get_queryset(self,id):
return model.objects.filter(user_profile=id)
#You do not need to call it again when you put the Lesson on the model
\
So i'm working on job application portal.
the logic is as follows :
Applicant ---> Applies for ---> Job
Models are (Job, User, Application)
I used the User model from django and i extend it.
Now the dilemma is when i render the ApplicationForm, because i have to update the foreign key and i want it to be updated automatically.
Here is my code :
Models.py
class Job(models.Model):
owner = models.ForeignKey(User,related_name='job_owner',on_delete=models.CASCADE)
title = models.CharField(max_length=100)
#location
job_type = models.CharField(max_length=15,choices=JOB_TYPE)
description= models.TextField(max_length=1000)
published_at = models.DateTimeField(auto_now=True)
vacancy = models.IntegerField(default=1)
salary = models.IntegerField(default=0)
experience = models.IntegerField(default=1)
category = models.ForeignKey('Category',on_delete=models.CASCADE)
icon = models.ImageField(upload_to ='job_icons/',default='job_icons/job.png')
slug = models.SlugField(blank = True,null=True)
class Application(models.Model):
job = models.ForeignKey(Job, related_name="job_applied",on_delete=models.CASCADE)
applicant = models.ForeignKey(User,related_name='job_applicant',on_delete=models.CASCADE)
first_name= models.CharField(max_length=40)
last_name= models.CharField(max_length=40)
email = models.EmailField(max_length=60)
website = models.URLField()
cv = models.FileField(upload_to='application/')
coverletter = models.TextField(max_length=550)
application_date = models.DateTimeField(auto_now=True)
def __str__(self):
return self.last_name+"\t"+self.first_name
Forms.py
class JobApplication(ModelForm):
class Meta:
model = Application
fields = ['first_name', 'last_name','email', 'website','cv','coverletter']
vews.py
def job_detail(request,slug):
job_specific = Job.objects.get(slug=slug)
form = JobApplication(instance=request.user)
if request.method == 'POST':
form = JobApplication(request.POST,request.FILES)
if form.is_valid():
my_form = form.save(commit=False)
my_form.job = job_specific
Application.applicant.user = request.user
Application.job = job_specific
my_form.save()
context ={'job_specific':job_specific, 'form':form,}
return render(request,"job/job_details.html",context)
So once the user submit their application, i wanted to updated the fields that are "foreign key" without prompting the user.
I do not know how to arrange this in the views.py or if it's even possible this way?
thanks to everyone in advance
So i solved the problem, it was really simple solution:
my_form = form.save(commit=False)
my_form.job = job_specific
my_form.applicant = request.user
when i try to post a house instance it tells me the data is valid but won't save it knowing that it was working before i added the user attribute , the problem i think is in the "id" attribute
class houseSerializers(serializers.ModelSerializer):
class Meta:
model = House
fields =('id','user','title','city','type','address','rooms','beds','price')
the representation of the serializer
>>> print(repr(serializer))
houseSerializers():
id = IntegerField(label='ID', read_only=True)
user = PrimaryKeyRelatedField(queryset=User.objects.all())
title = CharField(max_length=50)
city = CharField(max_length=50)
type = CharField(max_length=50)
address = CharField(max_length=50)
rooms = IntegerField()
beds = IntegerField()
price = IntegerField()
>>>
#api_view(['POST'])
def houseCreate(request):
serializer = houseSerializers(data=request.data)
if serializer.is_valid():
serializer.save
return Response(serializer.data)
I have a Task model. I want to assign task to multiple users so i have taken ManytoMany relationship. So Django is creating a ManytoMany table but i want to track that which user has completed task and when. So I took intermediary model by using through='TaskComplete'. Now I can not see task_assign_to feild in form. And even i declare in modelForms and submit it gives below error.
Cannot set values on a `ManyToManyField` which specifies an intermediary model. Use audit.TaskComplete's Manager instead.
Now I want that admin selects the user from main form and into intermediary model.
I tried but can not find any solution for this. below is my code. Please guide me how to do it?
My Model:
class Task(models.Model):
task_audit_title = models.ForeignKey(MainAudit,on_delete= models.CASCADE, related_name='audit_title_for_task',verbose_name= ('Audit Title'))
task_subtask_name = models.ManyToManyField(SubTask, related_name='subtask_for_task',verbose_name= ('Subtask Title'))
task_subject = models.CharField(verbose_name= ('Task Subject'),max_length=100,blank=False)
task_description = models.CharField(verbose_name= ('Task Description'),max_length=1000,blank=True)
task_assign_to = models.ManyToManyField(User, related_name='task_assign_to', through='TaskComplete')
task_assign_by = models.ForeignKey(User,on_delete= models.CASCADE, related_name='task_crt_by')
task_deadline = models.DateTimeField(null=True,blank=True)
task_perticulars = models.ManyToManyField(Perticular, related_name='task_perticular', blank=True)
task_created_time = models.DateTimeField(default=timezone.now)
task_modified_by = models.ForeignKey(User,on_delete= models.CASCADE, related_name='task_mod_by', null=True, blank=True)
task_modified_time = models.DateTimeField(null=True,blank=True)
is_del = models.BooleanField(default=0)
class Meta:
permissions = (
("change_temp_delete_task", "Can delete temporarily"),
)
def __str__(self):
return self.task_subject
def get_absolute_url(self):
return reverse('create-task')
class TaskComplete(models.Model):
task_title = models.ForeignKey(Task,on_delete= models.CASCADE, related_name='assigned_task')
is_completed = models.BooleanField(default=0)
task_cmt_by_doer = models.CharField(verbose_name= ('Submit Comment'),max_length=100,blank=True)
completed_by = models.ForeignKey(User,on_delete= models.CASCADE, related_name = 'task_completed_by')
completed_time = models.DateTimeField(null=True,blank=True)
My View:-
class TaskCraeteView(LoginRequiredMixin,SuccessMessageMixin,CreateView):
# permission_required = 'Company.add_company'
model=Task
success_message = " Task Craeted successfully!"
reverse_lazy('create-task')
login_url = 'login'
template_name = 'create-task'
form_class = TaskCreateForm
# fields =[]
def form_valid(self,form):
form.instance.task_assign_by = self.request.user
My traceback my traceback link
My Form
class TaskCreateForm(forms.ModelForm):
class Meta:
model = Task
fields = ['task_audit_title','task_subtask_name','task_subject','task_description',
'task_assign_to','task_deadline','task_perticulars']
How can I set values on to a ManyToManyField which specifies an intermediary model?
In the models.py
class BookUser(models.Model):
email = models.EmailField()
class Book(models.Model):
author_id= models.CharField(max_length=255)
send_to = models.ManyToManyField(BookUser, through='BookUserRelationship')
book_id = models.AutoField(primary_key=True)
file_size = models.CharField(null=True)
class BookUserRelationship(models.Model):
book = models.ForeignKey(Book, on_delete=models.CASCADE)
user = models.ForeignKey(BookUser, on_delete=models.CASCADE)
shared_date = models.DateTimeField(auto_now_add=True,null=True,blank=True)
Tried to update in serializers.py
class BookSerializer(serializers.ModelSerializer):
send_to = BookUserSerializer(many=True, read_only=True)
class Meta():
model = Book
fields = ('book_id', 'author_id','file_size','send_to')
class BookUserSerializer(serializers.ModelSerializer):
model = BookUser
fields = ('email')
In the views.py for listing the books by passing the book_id as query params
class BookListView(generics.ListCreateAPIView):
serializer_class = serializers.BookSerializer
def get(self, request, *args, **kwargs):
user = self.request.user
book_id = self.request.query_params.get('book_id', None)
if book_id:
book = models.Book.objects.filter(book_id=book_id)
return Response(serializers.BookSerializer(book[0]).data)
You don't need to do anything at all. You have already set the relevant data in your for loop, by creating the BookUserRelationship instances. That is the many-to-many relationship; you should just remove the instance.send_to.set(emails) line.