Django Why is one field created when I apply migrations? - django

Question

There are models, why after python manage.py makemigrations is created only by 1 field in migrations, how to fix it? I tried doing manage.py migrate --fake zero, and doing the migrations again, but nothing.The app is registered in settings.
from django.db import models
from django.urls import reverse
class Category(models.Model):
image = models.ImageField(default='default.png', upload_to='category_image'),
title = models.CharField(max_length=50, db_index = True),
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('category_detail_url', kwargs={'title': self.title})
class Provider(models.Model):
name = models.CharField(max_length=50, db_index = True),
phone_number = models.CharField(max_length=12, db_index = True),
address = models.CharField(max_length=50, db_index = True),
def __str__(self):
return self.name
class Product(models.Model):
title = models.CharField(max_length=50, db_index = True),
receipt_date = models.DateTimeField(auto_now_add=True, blank=True),
quantity_stock = models.IntegerField(),
quantity_store = models.IntegerField(),
purchase_price = models.IntegerField(),
image = models.ImageField(default='default.png', upload_to='product_image'),
provider = models.ForeignKey(Provider, null = True ,related_name='to_provider',on_delete=models.CASCADE),
category = models.ForeignKey(Category, null = True ,related_name='to_category',on_delete=models.CASCADE),
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('product_detail_url', kwargs={'title': self.title})
class Sale(models.Model):
product = models.ForeignKey(Product, related_name='to_product',on_delete=models.CASCADE),
date_of_sale = models.DateTimeField(auto_now_add=True, blank=True),
quantity_goods_sold = models.IntegerField(),
retail_price = models.IntegerField(),
def __str__(self):
return self.id

Answer 1

Your fields should not end with a comma (,). If you add a trailing comma, it will wrap the field in a singleton tuple, and thus Django is then not able to detect the field:
from django.db import models
from django.urls import reverse
class Category(models.Model):
image = models.ImageField(default='default.png', upload_to='category_image')
title = models.CharField(max_length=50, db_index = True)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('category_detail_url', kwargs={'title': self.title})
class Provider(models.Model):
name = models.CharField(max_length=50, db_index=True)
phone_number = models.CharField(max_length=12, db_index=True)
address = models.CharField(max_length=50, db_index=True)
def __str__(self):
return self.name
class Product(models.Model):
title = models.CharField(max_length=50, db_index = True)
receipt_date = models.DateTimeField(auto_now_add=True, blank=True)
quantity_stock = models.IntegerField()
quantity_store = models.IntegerField()
purchase_price = models.IntegerField()
image = models.ImageField(default='default.png', upload_to='product_image')
provider = models.ForeignKey(
Provider,
null=True,
related_name='products',
on_delete=models.CASCADE
)
category = models.ForeignKey(
Category,
null=True,
related_name='products',
on_delete=models.CASCADE
)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('product_detail_url', kwargs={'title': self.title})
class Sale(models.Model):
product = models.ForeignKey(
Product,
related_name='sales',
on_delete=models.CASCADE
)
date_of_sale = models.DateTimeField(auto_now_add=True, blank=True)
quantity_goods_sold = models.IntegerField()
retail_price = models.IntegerField()
def __str__(self):
return self.id