Adding Two Models In Django

[Ridwan Adeyemo]

How do I add two models together in the database, two different DecimalField. 

i.e math_score + eng_score = total_score

[patel dhruvish]

Use foreign key in 1 model for initiat another model...

On Wed, Jun 16, 2021, 00:04 Ridwan Adeyemo <adesolar...@gmail.com> wrote:

How do I add two models together in the database, two different DecimalField. 

i.e math_score + eng_score = total_score

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[Ridwan Adeyemo]

Thanks for the response. Kindly explain more or provide image description.

Best regards

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[Sebastian Jung]

Hello,

You create all modelfields inkl. Total sum and after user submit Form with 2 fields in save() Method you sum both fields together ans write this in total field...

Regards

Ridwan Adeyemo <adesolar...@gmail.com> schrieb am Di., 15. Juni 2021, 20:34:

How do I add two models together in the database, two different DecimalField. 

i.e math_score + eng_score = total_score

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[Ridwan Adeyemo]

Please kindly describe with images.

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[Ayush Bisht]

I think you are trying to sum up the value of two model fields and store them in some other field. 

so for that u can proceed from base. 

simple you just have to update that field in save method

for example : 

 class Student(models.Model):

       maths_score = models.DecimalField()

       english_score = models.DecimalFIeld()

       Total_score   = models.DecimalField(default = 0)

       def save(self, *args, **kwargs):

          self.Total_score  = self.maths_score  + self.english_score

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

or you can proceed with clean() method also. 

[Ridwan Adeyemo]

Thanks man.👍

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[Ridwan Adeyemo]

Good day,

Please how can this be achieved?

Best regards.

[Ayush Bisht]

class Year(models.Model):

    year = models.IntegerField()

class Month(models.Model):

    MONTH_CHOICE = (

        (1 , "Jan"),

        (2, 'Feb'),

        (3, 'March'),

        (4, 'April'),

        (5, 'May'),

        (6, 'June'),

        (7, 'July'),

        (8, 'Aug'),

        (9, 'Sept'),

        (10, 'Oct'),

        (11, 'Nov'),

        (12, 'Dec')

    )

    month = models.PositiveSmallIntegerField(choices = MONTH_CHOICE)

    year = models.ForeignKey(Year, on_delete= models.SET_NULL)

class Student(models.Model):

    name = models.CharField(max_length=266)

    admission_month = models.ForeignKey(Month, on_delete=models.SET_NULL)

you can proceed with this approach also...