Re: AttributeError 'QuerySet' object has no attribute 'expenses'

Hi,

please ignore the manager it is just a naming convention ignore, it if for me to identify tables, if i have 50 table, I want to be able to know which model is holding which object information and for what I need it.

Please use below, I have removed the # information to reduce confusion.

models.py

class Project(models.Model):

    name = models.CharField(max_length=100)

    budget = IntegerField()

    def save(self, *args, **kwargs):

        self.name

        super(Project, self).save(*args, **kwargs)

class Category(models.Model):

    project = models.ForeignKey(

        Project, on_delete=models.CASCADE)

    name = models.CharField(max_length=150)

class Expense(models.Model):

    project = models.ForeignKey(

        Project, on_delete=models.CASCADE, related_name='expenses')

    title = models.CharField(max_length=100)

    amount = models.DecimalField(max_digits=8, decimal_places=2)

    category = models.ForeignKey(Category, on_delete=models.CASCADE)

On 6 Sep 2019, at 20:45, Bhoopesh sisoudiya <bhoop23sis@gmail.com> wrote:

Best wishes,

Kean

Ok No problem but 

why you want Manager?

Please send me answer

Thanks

Bhoopesh sisoudiya

On Sat, Sep 7, 2019, 1:06 AM Kean <keanld1@gmail.com> wrote:

Hi Bhoopesh

Thanks for this, please can you put it into the context of my specific model setup, so I get it right and understand.

This will be easier for me as this approach is causing me some other errors, when i try to apply it.

Best wishes, 

Kean 

On 6 Sep 2019, at 20:19, Bhoopesh sisoudiya <bhoop23sis@gmail.com> wrote:

Hi Kean,

 Write manager like this ,I give you reference

from django.db import models

 # First, define the Manager subclass. 

class BhoopeshBookManager(models.Manager):

   def get_queryset(self): 

        return super(BhoopeshBookManager, self).get_queryset().filter(author='Bhoopesh') 

# Then hook it into the Book model explicitly. class Book(models.Model): 

title = models.CharField(max_length=100) 

author = models.CharField(max_length=50)

 # ... 

objects = models.Manager()

 # The default manager. 

bhoopesh_objects = BhoopeshBookManager()

 # The Bhoopesh-specific manager.

Book.bhoopesh_objects.all() # use manager

Thanks 

Bhoopesh Kumar

On Sat, Sep 7, 2019, 12:34 AM Bhoopesh sisoudiya <bhoop23sis@gmail.com> wrote:

Hi kean,

    Please check Expenses Class is not Manager

    Please make Manager Class.

Thanks

Bhoopesh sisoudiya

On Sat, Sep 7, 2019, 12:20 AM Kean <keanld1@gmail.com> wrote:

Hi, 

New to Django. when navigating to the reqired view, I get the error above.

urls.py

path('businesslogin/businessadmin/busproject', views.projectdetail, name='projectdetail'),

views.py

def projectdetail(request):

    project = Project.objects.all()

    return render(request, 'busprojectdetail.html', {'project': project, 'expense_list': project.expenses.all()})

models.py

# Project model

class Project(models.Model):

    name = models.CharField(max_length=100)

    budget = IntegerField()

    def save(self, *args, **kwargs):

        self.name

        super(Project, self).save(*args, **kwargs)

# Category manager model

class Category(models.Model):

    project = models.ForeignKey(

        Project, on_delete=models.CASCADE)

    name = models.CharField(max_length=150)

# Expenses manager model

class Expense(models.Model):

    project = models.ForeignKey(

        Project, on_delete=models.CASCADE, related_name='expenses')

    title = models.CharField(max_length=100)

    amount = models.DecimalField(max_digits=8, decimal_places=2)

    category = models.ForeignKey(Category, on_delete=models.CASCADE)

the error is as follows:

Exception Type:	AttributeError
Exception Value:	'QuerySet' object has no attribute 'expenses'
Exception Location:	/Users/ProductionEnv/Desktop/test/test1/dev/core/views.py in projectdetail, line 238 Please can anyone help? Best  K

-- 
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/024bc998-b683-41ae-90e2-d33f4527913a%40googlegroups.com.

-- 
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAAk3c1NmgbP7cQtyX8uOAFX%3DXbyC6f2ug1FURabwxRgD44Mwpg%40mail.gmail.com.

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/52D49AAA-5E17-4F6C-92DE-E1576F305927%40gmail.com.

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAAk3c1PtFX7oNie8qZKF%3Dm7jFrCEMwTZfn%2BcvWBFSqc9FT0h4A%40mail.gmail.com.