Django：讓管理員獲取圖像文件，但將其存儲為base64字符串

Question

我的任務是創建一個管理視圖，以便用戶可以輸入一個圖像文件，然而它將作為模型字段存儲為base64字符串，而不是存在於我們服務器上的靜態文件目錄中。

我不清楚這個過程究竟是如何完成的，我是否應該從管理視圖中截取POST請求並預先處理它以存儲在字段中？ 我應該覆蓋基本表單的保存方法嗎？ 由於我是Django的新手並且無法產生工作結果，因此我對這些方法感到有些困惑。

這是我的設置：

models.py

from django.db import models

class Product(models.Model):
    organization = models.ForeignKey(Organization)
    name = models.CharField(max_length=50) 
    logo = models.TextField() 

admin.py

from django.contrib import admin
from .models import Product 

class ProductAdmin(admin.ModelAdmin):
    exclude = ('logo',)

admin.site.register(Product, ProductAdmin)

misc.py

#how i'd process an image?
from PIL import Image
from base64 import b64encode

def image_to_b64(image_file):
    imgdata = Image(image_file)
    encoded = b64encode(open(imgdata, 'rb'))
    return encoded

Answer 1

from django.db import models

class Product(models.Model):
    organization = models.ForeignKey(Organization)
    name = models.CharField(max_length=50) 
    logo = models.TextField()
    logo_image = models.ImageFiled(null=True, blank=True, upload_to='logo')


def image_to_b64(image_file):
    import base64
    with open(image_file.path, "rb") as f:
        encoded_string = base64.b64encode(f.read())
        return encoded_string

from django.dispatch import receiver
from django.db.models.signals import post_save, m2m_changed


@receiver(post_save, sender=Product)
def create_base64_str(sender, instance=None, created=False, **kwargs):
    if created:
        instance.logo = image_to_b64(instance.logo_image)
        instance.logo_image.delete()
        instance.save()