Boolean Field Django Can't Migrate to Postgresql

Question

Django Version 4.1
I have created migration in SQLite3 and want to change to Postgresql
when i connect to Postgresql i’ve this error

django.db.utils.ProgrammingError: cannot cast type smallint to boolean
LINE 1: ...R COLUMN "isProduct" TYPE boolean USING "isProduct"::boolean

this is my model

from django.db import models

class Item(models.Model):
    name = models.CharField(max_length = 150)
    slug = models.SlugField(unique = True, db_index=True, null=True)
    pic = models.URLField(max_length = 400)
    address = models.CharField(max_length = 150)
    phone = models.CharField(max_length = 15)
    price = models.IntegerField()
    original_link = models.URLField(max_length = 400)
    description = models.TextField(max_length = 1500)
    additional_desc = models.TextField(max_length = 1500,default='')
    material = models.TextField(max_length = 200, default = '')
    weight = models.DecimalField(max_digits = 12, decimal_places = 2, default = 0)
    weight_unit = models.CharField(max_length = 4, default = '')
    color = models.CharField(max_length = 50, default = '')
    dimension_length = models.DecimalField(max_digits = 12, decimal_places = 2, default = 0)
    dimension_width = models.DecimalField(max_digits = 12, decimal_places = 2, default = 0)
    dimension_height = models.DecimalField(max_digits = 12, decimal_places = 2, default = 0)
    dimension_unit = models.CharField(max_length = 4, default='')
    isProduct = models.BooleanField(default = True)
    furniture_location = models.CharField(max_length = 100, default='')
    
    def __str__(self):
        return self.name

i’ve tried to change BooleanField to SmallIntegerField, PositiveSmallIntegerField, and IntegerField and the error still says the same thing

How to fix this error because this error prevent sessions and contenttype table to be migrated

Asked By: limitededition

||

Source

Answer 1

In my experience, if you tried to change something in Django models and the error stays the same it means you need to restart or delete the table and start migrating it. I suggest you do this
Make sure the settings.py is connected to PostgreSQL

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': '<PostgreSQL_DBName>',
        'USER': '<PostgreSQL_UserName>',
        'PASSWORD': '<PostgreSQL_Password>',
        'HOST': '<PostgreSQL_HOST>',
        'PORT': '<PostgreSQL_PORT>',
    }
}

Delete/Drop database in your PostgreSQL
Delete all migrations in migrations/
python manage.py makemigrations
python manage.py migrate

**Notes
If your PostgreSQL is localhost and you’re accessing from pgAdmin

Disabled your connection with database
Delete/Drop Database
The Database looks like not deleted by all you need to do is close the pgAdmin and open it again
follow step 3 and 4 above

Answered By: Michael Halim

Boolean Field Django Can't Migrate to Postgresql

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