Resubmitting File in FileField after Validation Error in Django [duplicate] - django

Question

This question already has answers here:
How to make a Django form retain a file after failing validation
(5 answers)
Closed 6 years ago.
In Django project forms with FileField, ImageField. Everything works great, but when ValidationError is raised, I have to reselect all files and images again. I want to avoid this one by caches concept in django
but I am not getting currect output please correct this code and add if any required
-models.py
from __future__ import unicode_literals
from django.db import models
# Create your models here.
from django.db import models
from django.db.models import ImageField
# or if you use sorl-thumbnail
# from sorl.thumbnail.fields import ImageField
import os
def resume_path(instance, filename):
fn, ext = os.path.splitext(filename)
return "resumes/{id}{ext}".format(id=instance.title, ext=ext)
class Page(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
image = ImageField(upload_to=resume_path)
-admin.py
from django.contrib import admin
# Register your models here.
from django.contrib import admin
from file_resubmit.admin import AdminResubmitMixin
from .models import Page
from django.forms import ModelForm
from file_resubmit.admin import AdminResubmitImageWidget,
AdminResubmitFileWidget
from .models import Page
class PageModelForm(ModelForm):
class Meta:
model = Page
widgets = {
'picture': AdminResubmitImageWidget,
'file': AdminResubmitFileWidget,
}
fields = '__all__'
class PageAdmin(admin.ModelAdmin,AdminResubmitMixin):
form = PageModelForm
admin.site.register(Page, PageAdmin)
-settings.py
CACHES = {
'default': {
'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
},
"file_resubmit": {
'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
"LOCATION": '/home/xxxxxx/Downloads/Python/Projects_Python/pleasecome/tmp/file_resubmit',
# "LOCATION": os.path.join(BASE_DIR,'tmp/file_resubmit/'),
},
}
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'sub',
'file_resubmit',
]
MIDDLEWARE_CLASSES = [
'django.middleware.cache.UpdateCacheMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.middleware.gzip.GZipMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.cache.FetchFromCacheMiddleware',
]

Answer 1

The problem might be with the class PageAdmin
class PageAdmin(admin.ModelAdmin,AdminResubmitMixin):
form = PageModelForm
According to the documentation for django-form-resubmit the ModelAdmin should be be created in one of these ways:
class PageAdmin(admin.ModelAdmin):
form = PageModelForm
class PageAdmin(AdminResubmitMixin, admin.ModelAdmin):
pass
The order you declare parent classes is significant, so you should follow the official example. And since you have a custom form, you don't need to use the AdminResubmitMixin at all.