Django saved instance model WITH ERROR

[ylativ oknesyl]

models

-----------------------

import datetime

from mimetypes import MimeTypes

from django.db import models

from django.utils import timezone

from django.utils.translation import ugettext_lazy as _

from mutagen import mp3, mp4, oggvorbis, oggtheora

import libs

.........................

class Photo(models.Model):

    id = models.AutoField(primary_key=True)

    title = models.CharField(verbose_name=_('Name of photo'), max_length=200, help_text=_('Enter name of photo'))

    path = models.ImageField(verbose_name=_('Path to photo'), upload_to='photos', help_text=_('Choice path to photo'))

    pub_date = models.DateTimeField(verbose_name=_('Added'), auto_now_add=True)

    def recently_added(self):

        return timezone.now() >= self.pub_date >= timezone.now() - datetime.timedelta(days=3)

    recently_added.admin_order_field = 'pub_date'

    recently_added.boolean = True

    recently_added.short_description = _('Recently?')

    def get_dimension_photo(self):

        return '{0} x {1}'.format(self.path.width, self.path.height)

    get_dimension_photo.short_description = _('Dimension')

    def get_size_file(self):

        """

        documentation for function get_size_file

        """

        return libs.ReadebleSizeFile(self.path.size)

    get_size_file.short_description = _('Size')

    def get_type_file(self):

        """

        documentation for function get_size_file

        """

        mime = MimeTypes()

        mime_type = mime.guess_type(str(self.path.file))

        return mime_type[0]

    get_type_file.short_description = _('Type')

    def __str__(self):

        return self.title

    class Meta:

        db_table = 'app_files_photo'

        get_latest_by = 'pub_date'

        ordering = ["-pub_date"]

        verbose_name = _("Photo")

        verbose_name_plural = _("Photos")

.................

shell Ipython

-----------------

In [25]: p = Photo(title='1', path='')

In [26]: p.id

In [27]: p.clean

p.clean         p.clean_fields  

In [27]: p.full_clean()

---------------------------------------------------------------------------

ValidationError                           Traceback (most recent call last)

<ipython-input-27-d11f1507e99a> in <module>()

----> 1 p.full_clean()

/home/wlysenko/.virtualenvs/virtual_brat/lib/python3.4/site-packages/django/db/models/base.py in full_clean(self, exclude, validate_unique)

   1134 

   1135         if errors:

-> 1136             raise ValidationError(errors)

   1137 

   1138     def clean_fields(self, exclude=None):

ValidationError: {'path': ['This field cannot be blank.']}

In [28]: p.save()

In [29]: p.id

Out[29]: 12

In [30]: 

----------------------------

[Tim Graham]

It's expected behavior. If you don't want to save an invalid instance, then don't call save() after you call full_clean() and encounter errors. As documented [1], calling save() itself don't do any validation.

[1] https://docs.djangoproject.com/en/stable/ref/models/instances/#validating-objects