Django, Cannot assign None, does not allow null values

django, django-admin, django-models

Solution

 #for sql 'now()' value use
 published = models.DateField('Published', auto_now_add=True)
 #to allow sql null
 published = models.DateField('Published', null=True, blank=True)

Problem

i have this models.py ``` import datetime from django.db import models from tinymce import models as tinymce_models from filebrowser.fields import FileBrowseField class ItemWithMedia(models.Model): created = models.DateTimeField(auto_now_add=True) modified = models.DateTimeField(auto_now=True) class Actual(ItemWithMedia): published = models.DateField('Published') title_hr = models.CharField('(hr)', max_length=200) title_en = models.CharField('(en)', max_length=200) body_text_hr = models.TextField('(hr)') body_text_en = models.TextField('(en)') def __unicode__(self): return self.title_hr class Meta: verbose_name = "Aktualno" verbose_name_plural = "Aktualni" ordering = ['-published'] ``` and i get this error when i try to create new item in admin site: Cannot assign None: "Actual.published" does not allow null values. what could be the problem?

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