如何在Django中保存之前旋轉圖像？

Question

現在我正在創建一個Web應用程序，允許用戶使用Django Rest Framework上傳圖像。 我想根據EXIF標簽旋轉這些圖像並保存。

起初，我發現了這種方式 ，它適用於當地環境。 但是，現在我使用Amazon S3進行部署，然后這種方式不起作用。

因此，我正在嘗試在保存和掙扎之前旋轉圖像...最近的代碼如下， TypeError at /api/work/ 'str' object is not callable提出TypeError at /api/work/ 'str' object is not callable當我發布新的Work對象時， TypeError at /api/work/ 'str' object is not callable 。

怎么解決？
還是有其他好方法嗎？

[models.py]

from django.db import models
from django.conf import settings
from PIL import Image as Img
from PIL import ExifTags
from io import BytesIO
from django.core.files import File
import datetime


class Work(models.Model):
    owner       = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True, blank=True)
    title       = models.CharField(max_length=120)
    made_date   = models.DateField(default=datetime.date.today, null=True, blank=True)
    note        = models.TextField(max_length=2000, null=True, blank=True)
    image       = models.ImageField(upload_to='work_pic', default='default_image.png')

    def __str__(self):
        return self.title

    def save(self, *args, **kwargs):
        if self.image:
            pilImage = Img.open(BytesIO(self.image.read()))
            for orientation in ExifTags.TAGS.keys():
                if ExifTags.TAGS[orientation] == 'Orientation':
                    break
            exif = dict(pilImage._getexif().items())

            if exif[orientation] == 3:
                pilImage = pilImage.rotate(180, expand=True)
            elif exif[orientation] == 6:
                pilImage = pilImage.rotate(270, expand=True)
            elif exif[orientation] == 8:
                pilImage = pilImage.rotate(90, expand=True)

            output = BytesIO()
            pilImage.save(output, format='JPEG', quality=75)
            output.seek(0)
            self.image = File(output, self.image.name())

        return super(Work, self).save(*args, **kwargs)

[serializers.py]

from rest_framework import serializers
from .models import Work


class WorkSerializer(serializers.ModelSerializer):
    owner = serializers.HiddenField(default=serializers.CurrentUserDefault())

    class Meta:
        model = Work
        fields = '__all__'

    def create(self, validated_data):
        return Work.objects.create(**validated_data)

Answer 1

在save()方法中，您將self.image.name屬性作為函數調用。 Image.name是一個string屬性，因此您不必將其稱為函數。

所以將行self.image = File(output, self.image.name())更改為
self.image = File(output, self.image.name)
將解決錯誤

完整的模型定義

class Work(models.Model):
    owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True, blank=True)
    title = models.CharField(max_length=120)
    made_date = models.DateField(default=datetime.date.today, null=True, blank=True)
    note = models.TextField(max_length=2000, null=True, blank=True)
    image = models.ImageField(upload_to='work_pic', default='default_image.png')

    def __str__(self):
        return self.title

    def save(self, *args, **kwargs):
        if self.image:
            pilImage = Img.open(BytesIO(self.image.read()))
            for orientation in ExifTags.TAGS.keys():
                if ExifTags.TAGS[orientation] == 'Orientation':
                    break
            exif = dict(pilImage._getexif().items())

            if exif[orientation] == 3:
                pilImage = pilImage.rotate(180, expand=True)
            elif exif[orientation] == 6:
                pilImage = pilImage.rotate(270, expand=True)
            elif exif[orientation] == 8:
                pilImage = pilImage.rotate(90, expand=True)

            output = BytesIO()
            pilImage.save(output, format='JPEG', quality=75)
            output.seek(0)
            self.image = File(output, self.image.name)

        return super(Work, self).save(*args, **kwargs)