Python 3.8 django log 5 - Add foreign key and change model

1. Go to model.py add model

class Meeting(models.Model):
    title = models.CharField(max_length=200)
    date = models.DateField()
    start_time = models.TimeField()
    duration = models.IntegerField()

2. Command : python manag

python manage.py makemigrations

You can see the option

we press 2 and add the deflaut value 

3. add default value 

from django.db import models

from datetime import time


class Meeting(models.Model):
    title = models.CharField(max_length=200)
    date = models.DateField()
    start_time = models.TimeField(default=time(9))

    duration = models.IntegerField(default=1)

do the migration again

run python manage.py migrate

4. add def

from django.db import models

from datetime import time


class Meeting(models.Model):
    title = models.CharField(max_length=200)
    date = models.DateField()
    start_time = models.TimeField(default=time(9))
    duration = models.IntegerField(default=1)

    def __str__(self):
        return f"{self.title} at {self.start_time} on {self.date}"

5. Run the server and go back to admin

Name change

** 行數唔得有影響 , 咁會no effect 因為唔係個class 入面

from django.db import models

from datetime import time


class Meeting(models.Model):
    title = models.CharField(max_length=200)
    date = models.DateField()
    start_time = models.TimeField(default=time(9))
    duration = models.IntegerField(default=1)


def __str__(self):
    return f'{self.title} at {self.startpy_time} on {self.date}'