无法识别图像文件 ImageFieldFile

Question

我在 Python 中使用 django，在我的 models.py 中我声明了一个带有属性图像的锦标赛模型，这是保存方法：

import datetime
from django.db import models
from django.utils import timezone
from tinymce.models import HTMLField
from rules.models import Rule
from news.models import Tag, News
from courts.models import Court
from news.models import replace_spaces
from datetime import datetime
from sorl.thumbnail import ImageField, get_thumbnail
from PIL import Image
from django.core.files.storage import default_storage as storage
from django.conf import settings

class Tournament(models.Model):
    name = models.CharField(max_length=50, default='', verbose_name='Nombre')
    name_url = models.CharField(max_length=200, default='', editable=False)
    inscription_opening_date = models.DateField('fecha de apertura de inscripcion')
    inscription_closing_date = models.DateField('fecha de cierre de inscripcion')
    tournament_starting_date = models.DateField('fecha de inicio del torneo')
    tournament_ending_date = models.DateField('fecha de finalizacion del torneo')
    description = HTMLField(default='', verbose_name='Descripcion del Torneo', blank=True)
    image = ImageField(upload_to='tournamentpic', verbose_name='Imagen')
    situation = models.ForeignKey(TournamentSituation, default='', verbose_name='Estado del Torneo')
    tournament_format = models.ForeignKey(TournamentFormat, default='', verbose_name='Formato del Torneo')
    regulation = models.ForeignKey(Rule, default='', verbose_name='Reglamento')
    tournament_type = models.ForeignKey(TournamentType, default='', verbose_name='Tipo de Torneo')
    tournament_category = models.ForeignKey(TournamentCategory, default='', verbose_name='Categoria de Torneo')
    quota = models.IntegerField(default=0, verbose_name='Cupos')
    tag = models.ManyToManyField(Tag)
    price = models.DecimalField(default=0, max_digits=6, decimal_places=2, blank=True)
    zones = models.IntegerField(default=0, verbose_name='Zonas', blank=True)
    KNOCKOUT_OPENING_CHOICES = (
        ('64', 'Ronda de 128'),
        ('32', 'Ronda de 64'),
        ('16', 'Ronda de 32'),
        ('8', 'Octavos de Final'),
        ('4', 'Cuartos de Final'),
        ('2', 'Semifinal'),
    )
    knockout_opening_round = models.CharField(max_length=2, verbose_name='Instancia de Inicio de Llaves', choices=KNOCKOUT_OPENING_CHOICES, default='32', blank=True)
    singles = models.IntegerField(default=0, verbose_name='Numero de Singles', blank=True)
    doubles = models.IntegerField(default=0, verbose_name='Numero de Doubles', blank=True)
    photo_full_size = models.CharField(max_length=255, blank=True, editable=False)



def save(self):
    self.name_url = replace_spaces(self.name)
    sizes = {'full': {'height': 415, 'width': 620},}

    extension = self.image.name.rsplit('.', 1)[1]  # the file extension
    now = datetime.now()
    date = now.strftime("%H-%M-%S-%d-%m-%Y")
    self.image.name = date +'.png'
    filename = date

    super(Tournament, self).save()
    default_format = 'PNG'
    im = Image.open(self.image)

    if extension not in ['jpg', 'jpeg', 'gif', 'png']: sys.exit()

    new_size = im.resize((sizes['full']['width'], sizes['full']['height']), Image.ANTIALIAS)
    medname = "-" + str(sizes['full']['width']) + "x" + str(sizes['full']['height']) + ".png"
    thumb_path = UPLOAD_TO + filename + medname
    fh = storage.open(thumb_path, "w")
    new_size.save(fh,default_format)
    fh.close()
    self.photo_full_size = thumb_path

当我在管理员中保存新锦标赛时，我收到以下错误：

cannot identify image file <ImageFieldFile: 16-16-58-19-06-2015.png>

我正在将我的图片和媒体文件上传到 S3。 奇怪的是，在另一个模型中，具有完全相同的配置它可以完美地工作！ 这是另一个模型：

from django.db import models
from tinymce.models import HTMLField
from datetime import datetime
from sorl.thumbnail import ImageField, get_thumbnail
from PIL import Image
from django.core.files.storage import default_storage as storage
from django.conf import settings

import sys

MEDIA_URL = getattr(settings, 'MEDIA_URL')

UPLOAD_TO = 'aboutpic/'

class Name(models.Model):
    name = models.CharField(max_length=20, default='', verbose_name='Nombre')
    lastname = models.CharField(max_length=20, default='', verbose_name='Apellido')

    def __str__(self):            
        return self.name + ' ' + self.lastname

class About(models.Model):
    image = ImageField(upload_to='aboutpic', verbose_name='Imagen de Portada')
    introduction = HTMLField(default='', verbose_name='Cuerpo de Noticia', blank=True)
    creation_date = models.DateField('fecha de publicacion', default=datetime.now(), editable=False)
    names = models.ManyToManyField(Name)
    photo_full_size = models.CharField(max_length=255, blank=True, editable=False)

    def save(self):
        sizes = {'full': {'height': 415, 'width': 620},}

        extension = self.image.name.rsplit('.', 1)[1]  # the file extension
        now = datetime.now()
        date = now.strftime("%H-%M-%S-%d-%m-%Y")
        self.image.name = date +'.png'
        filename = date

        super(About, self).save()
        print self.image
        default_format = 'PNG'
        im = Image.open(self.image)
        if extension not in ['jpg', 'jpeg', 'gif', 'png']: sys.exit()

        new_size = im.resize((sizes['full']['width'], sizes['full']['height']), Image.ANTIALIAS)
        medname = "-" + str(sizes['full']['width']) + "x" + str(sizes['full']['height']) + ".png"
        thumb_path = UPLOAD_TO + filename + medname
        fh = storage.open(thumb_path, "w")
        new_size.save(fh,default_format)
        fh.close()
        self.photo_full_size = thumb_path

        super(About, self).save()

    def get_full_size(self):
        return MEDIA_URL + self.photo_full_size

Answer 1

这是作为实际答案的评论：

在 admin.py 中：

def response_change(self, request, obj): 
    obj.save()  
    return HttpResponseRedirect(
        reverse('admin:tournaments_tournament_change', args=(obj.id,))
    ) 

def response_add(self, request, obj, post_url_continue=None): 
    obj.save()  
    return HttpResponseRedirect(
        reverse('admin:tournaments_tournament_change', args=(obj.id,))
    )