jamilnoyda

# good bad dict

context={"first_name": user.first_name.capitalize(),"company": g.user.get_company_name,"last_name": g.user.last_name.capitalize(),"username": user.username,"password": password}
# difficult to debug and difficult to find a bug

# good dict
context = {
    "first_name": user.first_name.capitalize(),
    "company": g.user.get_company_name,
    "last_name": g.user.last_name.capitalize(),

jamilnoyda

# bad import 
from sqlalchemy import Boolean, Column, create_engine, DateTime, ForeignKey, Integer, MetaData, String, Table, Text

# good import 
from sqlalchemy import (
    Boolean,
    Column,
    create_engine,
    DateTime,
    ForeignKey,

jamilnoyda

class Restaurant(models.Model):
    pass

class Waiter(models.Model):
    restaurant = models.ForeignKey(Restaurant, on_delete=models.CASCADE)
    name = models.CharField(max_length=50)

Waiter.objects.select_related('waiter').all() # Forward ForeignKey relationship
Restaurant.objects.prefetch_related('waiter_set').all() # Reverse ForeignKey relationship

jamilnoyda

# wrong one!
wrong_dict = {1: 'Geeks', 2: 'For',  3:{'A' : 'Welcome', 'B' : 'To', 'C' : 'Geeks'}} 

# right one!
right_dict = {
    1: 'hi',
    2: 'there',
    3: {
        'A': 'how',
        'B': 'are',

jamilnoyda

class Topping(models.Model):
    name = models.CharField(max_length=30)

class Pizza(models.Model):
    name = models.CharField(max_length=30)
    toppings = models.ManyToManyField(Topping)

jamilnoyda

class Waiter(models.Model):
    restaurant = models.ForeignKey(Restaurant, on_delete=models.CASCADE)
    name = models.CharField(max_length=50)

    def __str__(self):
        return "%s the waiter at %s" % (self.name, self.restaurant)

jamilnoyda

class Place(models.Model):
    name = models.CharField(max_length=50)
    
    
class Restaurant(models.Model):
    place = models.OneToOneField(Place,on_delete=models.CASCADE)
    serves_hot_dogs = models.BooleanField(default=False)