django models code example

Example 1: create models in django

from django.db import models
# Create your models here.

class Contact(models.Model):
    name = models.CharField(max_length=50)
    email = models.CharField(max_length=50)
    contact = models.CharField(max_length=50)
    content = models.TextField()
    def __str__(self):
        return self.name + ' ' + self.email

Example 2: django meta attributes

# All Django Class Meta Attributes
abstract
app_label
base_manager_name
db_table
Table names
db_tablespace
default_manager_name
default_related_name
get_latest_by
managed
order_with_respect_to
ordering
permissions
default_permissions
proxy
required_db_features
required_db_vendor
select_on_save
indexes
unique_together
index_together
constraints
verbose_name
verbose_name_plural

Example 3: primary key django model

class Garden(models.Model):
    garden_id = models.IntegerField(primary_key=True)

Example 4: model object means in django

CREATE TABLE myapp_person (
    "id" serial NOT NULL PRIMARY KEY,
    "first_name" varchar(30) NOT NULL,
    "last_name" varchar(30) NOT NULL
);

Example 5: django models

Models in Django are classes that represent data base tables.

Example 6: django models syntax

from django.db import models

class Student(models.Model):
    FRESHMAN = 'FR'
    SOPHOMORE = 'SO'
    JUNIOR = 'JR'
    SENIOR = 'SR'
    GRADUATE = 'GR'
    YEAR_IN_SCHOOL_CHOICES = [
        (FRESHMAN, 'Freshman'),
        (SOPHOMORE, 'Sophomore'),
        (JUNIOR, 'Junior'),
        (SENIOR, 'Senior'),
        (GRADUATE, 'Graduate'),
    ]
    year_in_school = models.CharField(
        max_length=2,
        choices=YEAR_IN_SCHOOL_CHOICES,
        default=FRESHMAN,
    )

    def is_upperclass(self):
        return self.year_in_school in {self.JUNIOR, self.SENIOR}