Re: Django count

It looks like maybe a slight change to your models and schema would make this a bit cleaner if I'm understanding your overall schema correctly.  I would split this up into two different models with a ManyToMany relationship in there.  I am assuming you have students and then an Egitim instance is one instance of a student taking one class, correct?

class Student(models.Model):
    first_name = models.CharField(max_length=200)

    surname =  models.CharField(max_length=20)
    email = models.EmailField(max_length=75)
    courses = models.ManyToManyFIeld('Course', blank=True)

class Course(models.Model):
    course_name =  models.CharField(max_length=300)

Then if you need the count you can do one of these:
student = Student.objects.get(email=email_address)
student.courses.all().count()

Course.objects.filter(student__email=email_address).count()

On Sunday, July 28, 2013 8:06:28 AM UTC-4, Murat Bilal wrote:

Hi all,

I have a model like this

class Egitim(models.Model):
    name = models.CharField(max_length=200)
    surname =  models.CharField(max_length=20)
    email = models.EmailField(max_length=75)
    course_name =  models.CharField(max_length=300)
    num_of_courses_taken = models.IntegerField(max_length=100)
    def __unicode__(self):

      return self.course_name

 

class EgitimForm(ModelForm):

    class Meta:
      model=Egitim
      fields=('name','surname','email','course_name')
I want to increment num_of_courses_taken value according to email addresses.For example if there are 3 aa@example .com mail is submitted in ModelForm.it means the user aa have taken 3 courses.

 

Please Help

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