__init__() got an unexpected keyword argument 'on delete' when make migrations

[Khánh Hoàng]

Hi everyone, I am new to programming, more than 4 months, I had an issue when making  migrations for my apps. 

I run :" python manage.py makemigrations " and  I got a error.

 It said:  TypeError: __init__() got an unexpected keyword argument 'on delete'

I'm Using Django 3.2.9 

Can someone explain it for me? And how to fix it.

Thanks and Regards,

Khanh Hoang

[Uzzal Hossain]

Change on delete to on_delete in your model

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[Samuel Nogueira]

Please, can you take some prints of your models?

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[Khánh Hoàng]

from ctypes import DEFAULT_MODE

from django.db import models

from django.db.models.deletion import CASCADE, PROTECT

from django.db.models.expressions import Col

from django.db.models.fields import PositiveSmallIntegerField

from django.utils.translation import pgettext_lazy

class Promotions(models.Model):

    description = models.CharField(max_length=255)

    discount = models.FloatField()

class Collection(models.Model):

    title = models.CharField(max_length=255)

class Product(models.Model):

    title = models.CharField(max_length=255)

    descriptions = models.TextField()

    price = models.DecimalField(max_digits=5, decimal_places=2)

    inventory = models.IntegerField()

    last_update = models.DateTimeField(auto_now=True)

    collection = models.ForeignKey(Collection, on_delete=models.PROTECT)

    promotion = models.ManyToManyField(Promotions, on_delete=models.CASCADE)

class Customer(models.Model):

    MEMBERSHIP_BRONZE = "B",

    MEMBERSHIP_SILEVR = "S",

    MEMBERSHIP_GOLD = "G"

    MEMBERSHIP_CHOICES = [

        ('B', 'Bronze'),

        ('S', 'Silver'),

        ('G', 'Gold')

    ]

    first_name = models.CharField(max_length=255)

    last_name = models.CharField(max_length=255)

    email = models.EmailField(unique=True)

    phone = models.CharField(max_length=255)

    birth_date = models.DateField(null=True)

    membership = models.CharField(

        max_length=1, choices=MEMBERSHIP_CHOICES, default=MEMBERSHIP_BRONZE)

class Order(models.Model):

    PAYMENT_STATUS_PENDING = "P"

    PAYMENT_STATUS_COMPLETE = "C"

    PAYMENT_STATUS_FAILED = "F"

    PEYMENT_STATUS_CHOICES = [

        (PAYMENT_STATUS_PENDING, "Pending"),

        (PAYMENT_STATUS_COMPLETE, "Complete"),

        (PAYMENT_STATUS_FAILED, "Failed")

    ]

    placed_at = models.DateTimeField(auto_now_add=True)

    payment_status = models.CharField(

        max_length=1, choices=PEYMENT_STATUS_CHOICES, default=PAYMENT_STATUS_PENDING)

    customer = models.ForeignKey(Customer, on_delete=models.PROTECT)

class Address(models.Model):

    street = models.CharField(max_length=255)

    city = models.CharField(max_length=255)

    customer = models.ForeignKey(Customer, on_delete=models.CASCADE)

class Cart(models.Model):

    created_at = models.DateTimeField(auto_now_add=True)

class OrderItem(models.Model):

    order = models.ForeignKey(Order, on_delete=models.PROTECT)

    product = models.ForeignKey(Product, on_delete=models.PROTECT)

    quantity = models.PositiveSmallIntegerField()

    unit_price = models.DecimalField(max_digits=6, decimal_places=2)

class CartItem(models.Model):

    cart = models.ForeignKey(Cart, on_delete=models.CASCADE)

    product = models.ForeignKey(Product, on_delete=models.CASCADE)

    quantity = models.PositiveSmallIntegerField()

here is my  models.py. 

Vào lúc 22:39:21 UTC+7 ngày Chủ Nhật, 5 tháng 12, 2021, hu3mu...@gmail.com đã viết:

[Anurag Agarwal]

Why are you fucking passing the args

On_delete in manytomany . Class

  promotion = models.ManyToManyField(Promotions, on_delete=models.CASCADE)

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[Khánh Hoàng]

Oh, 

Thank you very much, I realized my mistake. 

Vào lúc 08:23:47 UTC+7 ngày Thứ Hai, 6 tháng 12, 2021, anurag....@gmail.com đã viết:

[Thomas Lockhart]

Please use polite language. Thank you.

- Tom

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[Aashish Kumar]

ManyToManyField doesn’t need on_delete attribute 

Remove on_delete attribute 

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[Khánh Hoàng]

Yes, I found it.

Thank you for replying.

Vào lúc 11:43:22 UTC+7 ngày Thứ Hai, 6 tháng 12, 2021, aashishk...@gmail.com đã viết: