title: ValueError: Field 'id' expected a number but got 'select'
body: <blockquote>
    <p><strong><em>When I run the "python manage.py migrate" command Error is occuring:</em></strong></p>
  </blockquote>
  
  <p>Operations to perform:
        Apply all migrations: admin, auth, contenttypes, sessions, travello
      Running migrations:
        Applying travello.0005_auto_20200313_1046...Traceback (most recent call last):
        File "C:\Users\uc\Envs\test\lib\site-packages\django\db\models\fields__init__.py", line 1772, in get_prep_value
          return int(value)
      ValueError: invalid literal for int() with base 10: 'select'</p>
  
  <pre><code>The above exception was the direct cause of the following exception:
  
  Traceback (most recent call last):
    File "manage.py", line 21, in &lt;module&gt;
      main()
    File "manage.py", line 17, in main
      execute_from_command_line(sys.argv)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
      utility.execute()
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\__init__.py", line 395, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
      self.execute(*args, **cmd_options)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\base.py", line 369, in execute
      output = self.handle(*args, **options)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\base.py", line 83, in wrapped
      res = handle_func(*args, **kwargs)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\core\management\commands\migrate.py", line 231, in handle
      post_migrate_state = executor.migrate(
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
      state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
      state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\migrations\executor.py", line 245, in apply_migration
      state = migration.apply(state, schema_editor)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
      operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\migrations\operations\fields.py", line 249, in database_forwards
      schema_editor.alter_field(from_model, from_field, to_field)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\backends\base\schema.py", line 564, in alter_field
      self._alter_field(model, old_field, new_field, old_type, new_type,
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\backends\postgresql\schema.py", line 152, in _alter_field
      super()._alter_field(
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\backends\base\schema.py", line 679, in _alter_field
      new_default = self.effective_default(new_field)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\backends\base\schema.py", line 303, in effective_default
      return field.get_db_prep_save(self._effective_default(field), self.connection)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\models\fields\related.py", line 939, in get_db_prep_save
      return self.target_field.get_db_prep_save(value, connection=connection)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\models\fields\__init__.py", line 821, in get_db_prep_save
      return self.get_db_prep_value(value, connection=connection, prepared=False)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\models\fields\__init__.py", line 2365, in get_db_prep_value
      value = self.get_prep_value(value)
    File "C:\Users\uc\Envs\test\lib\site-packages\django\db\models\fields\__init__.py", line 1774, in get_prep_value
      raise e.__class__(
  ValueError: Field 'id' expected a number but got 'select'.
  </code></pre>
  
  <p><strong>models.py</strong></p>
  
  <pre><code> from django.db import models
  
  class Destination(models.Model):  
      name = models.CharField(max_length=200)
      desc = models.TextField()
      price = models.IntegerField()
      img = models.ImageField(upload_to= 'pics')
      offer = models.BooleanField(default=False)
  
  class Category(models.Model):
      cat_name = models.CharField(max_length = 50)
  
      def __str__(self):
          return self.cat_name
  
  class Blog(models.Model):
      date = models.DateField()
      name = models.CharField(max_length=100)
      category = models.ForeignKey(Category, on_delete=models.CASCADE, default=0)
      desc = models.TextField()
      img = models.ImageField(upload_to= 'blog_img')
  
  class Subscribe(models.Model):
      name = models.CharField(max_length=100)
      email = models.CharField(max_length=100)
  </code></pre>
  
  <p><strong>admin.py</strong></p>
  
  <pre><code>from django.contrib import admin
  from .models import Destination
  from .models import Blog
  from .models import Category
  from .models import Subscribtion
  admin.autodiscover()
  
  admin.site.register(Destination)
  admin.site.register(Blog)
  admin.site.register(Category)
  admin.site.register(Subscribtion)
  </code></pre>
  
  <p><strong>0005_auto_20200313_1046.py</strong></p>
  
  <pre><code>from django.db import migrations, models
  import django.db.models.deletion
  import django.utils.timezone
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('travello', '0004_auto_20200312_1224'),
      ]
  
      operations = [
          migrations.RemoveField(
              model_name='blog',
              name='date',
          ),
          migrations.AddField(
              model_name='blog',
              name='created_at',
              field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
              preserve_default=False,
          ),
          migrations.AddField(
              model_name='blog',
              name='updated_at',
              field=models.DateTimeField(auto_now=True),
          ),
          migrations.AlterField(
              model_name='blog',
              name='category',
              field=models.ForeignKey(default='select', on_delete=django.db.models.deletion.CASCADE, to='travello.Category'),
          ),
      ]
  </code></pre>