This is where using the related_name kwarg comes in.
You can also use the default value, which in this case is academics_set.
I see you made most of the recommended changes to your model
definitions. I'd just like to reiterate two:
Remove the underscore in your model name.
Remove the 's
last):
File "", line 1, in
AttributeError: 'int' object has no attribute 'gpa'
My question is how can i make it work both ways ?? Is that even possible???
Date: Tue, 9 Aug 2011 08:50:48 -0400
Subject: Re: Need help writing join Django query for this simple model
rt Student_Info
>>> list=Student_Info.objects.all()
>>> obj=list[0]
>>> obj
Now i got the Student_info object. and i know Student_Info is linked to
Academics via Roll_No..
so now how could i read the GPA in Academics any suggestions??
Date: Tue, 9 Aug 2011 08:50:48 -0400
S
On Mon, Aug 8, 2011 at 11:49 PM, Hayyan Rafiq wrote:
> so i tried this now
>
>
> class Student_Info(models.Model):
> Roll_No = models.IntegerField(primary_key=True)
> Cell_No = models.IntegerField()
>
> E_mail = models.EmailField(max_length=30)
>
> class Academics(models.Model):
> * #Roll
in
AttributeError: 'Academics' object has no attribute 'Student_Info'
Any ideas or suggestions??
Date: Mon, 8 Aug 2011 23:07:59 -0400
From: sh...@milochik.com
To: django-users@googlegroups.com
Subject: Re: Need help writing join Django query for this simple model..
Re: Need help writing join Django query for this simple model..
Make your life a little easier and add a related_name argument to
your Roll_No foreign key.
Example:
Roll_No
= models.ForeignKey('Student_Info',to_field='Roll
Make your life a little easier and add a related_name argument to your
Roll_No foreign key.
Example:
Roll_No = models.ForeignKey('Student_Info',to_field='Roll_No',
related_name = 'students')
Then:
obj.students.all()[0].E_mail
Without a related name:
obj.student_set.all()[0].E_mail
No
ochik.com
To: django-users@googlegroups.com
Subject: Re: Need help writing join Django query for this simple model..
On 08/08/2011 10:55 PM, Hayyan Rafiq wrote:
Tried that
>>> recs=Academics.objects.all()
>>> recs[0
On 08/08/2011 10:55 PM, Hayyan Rafiq wrote:
Tried that
>>> recs=Academics.objects.all()
>>> recs[0]
>>> obj=recs[0]
>>> obj.Cell_No
Traceback (most recent call last):
File "", line 1, in
AttributeError: 'Academics' object has no attribute 'Cell_No'
Am i missing something??
Yes, 'Cell_No'
ng something??
> Date: Mon, 8 Aug 2011 22:48:05 -0400
> From: sh...@milochik.com
> To: django-users@googlegroups.com
> Subject: Re: Need help writing join Django query for this simple model..
>
> It would just be:
>
> recs = Academics.objects.all()
>
> Because
It would just be:
recs = Academics.objects.all()
Because that table has all those fields.
Also, some style notes:
It's non-standard to put underscores in class names.
It's non-standard to put capital letters in field names.
It's non-standard (and grammatically incorrect) to name
Suppose I have the following 2 Classes in models.
class Student_Info(models.Model):
Roll_No = models.IntegerField(primary_key=True)
E_mail = models.EmailField(max_length=30)
class Academics(models.Model):
Roll_No = models.ForeignKey('Student_Info',to_field='Roll_No')
GPA = models.Inte
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