title: Embedded Field: must be instance of Model: <class 'django.db.models.base.Model'>
body: <p>I tried to do a dummy seeder for the Entry model (extended from djongo model) with the object manager but I got an error while saving.</p>
  <p><strong>Error:  must be instance of Model: &lt;class 'django.db.models.base.Model'&gt;`</strong></p>
  Python script
  <p><code>&lt;The complete python script used to produce the issue.&gt;</code></p>
  <pre class="lang-py prettyprint-override"><code>from djongo import models
  from django.core.management.base import BaseCommand, CommandError
  
  class Blog(models.Model):
      name = models.CharField(max_length=100)
      tagline = models.TextField()
  
      class Meta:
          abstract = True
  
  class Entry(models.Model):
      _id = models.ObjectIdField()
      blog = models.EmbeddedField(
          model_container=Blog
      )
  
      headline = models.CharField(max_length=255)
      objects = models.DjongoManager()
  
  
  def build_dummy_entry():
      e = Entry.objects.create(
      headline='h1',
      blog={
          'name': 'b1',
          'tagline': 't1'
      })
  
      g = Entry.objects.get(headline='h1')
      assert e == g
  
      e = Entry()
      e.blog = {
          'name': 'b2',
          'tagline': 't2'
      }
      e.headline = 'h2'
      e.save()
  
  
  class Command(BaseCommand):
      help='Create a preset dummy entry'
  
      def handle(self, *args, **options):
          try:
              build_dummy_entry()
              self.stdout.write(self.style.SUCCESS(f'Successfully created dummy blog'))
          except Exception as e:
              raise CommandError(f'{e}')
  
  </code></pre>
  Traceback
  <pre><code>CommandError: Value: {'name': 'b1', 'tagline': 't1'} must be instance of Model: &lt;class 'django.db.models.base.Model'&gt;
  </code></pre>
  <h1>---EDIT SOLUTION---</h1>
  <p>I was using the <strong>1.3.1</strong>.
  I check the version <strong>1.3.2 and 1.3.3</strong> and it looks like these version <strong>contains the fix for the instantiation error.</strong></p>