I have made APIs in Django and uploading a file from the IOS app. I'm passing file by converting it into data using multipart request. It's uploading fine from the Postman but while posting from application, i'm getting following error,

{
    "userProfilePicture":["The submitted data was not a file.
                         Check the encoding type on the form."]
}

Can anybody help me with this out?

Code:

models.py

from __future__ import unicode_literals
from django.db import models
import datetime

def upload_location(instance, fileName):
    extension       = fileName.split('.')[-1]
    random_string   = 'IMG-' + datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
    filename        = "images/" + UserImages._meta.app_label + "/" + random_string + "."  + extension
    return filename

class UserImages(models.Model):
    userId                  = models.AutoField(primary_key=True, db_column="user_id")
userProfilePicture      = models.ImageField (
    "Profile Picture", 
    upload_to = upload_location,
    db_column="user_profile_picture",
    blank=True
    )

serializers.py

from rest_framework import serializers
from .models import UserImages

class UserImageSerializer(serializers.ModelSerializer):

    class Meta:
        model = UserImages

views.py

from django.shortcuts import render
from rest_framework.response import Response
from rest_framework import status
from rest_framework.generics import  ListCreateAPIView, RetrieveUpdateDestroyAPIView
from .serializers import UserImageSerializer
from .models import UserImages

class UserImageUpload(ListCreateAPIView):
    serializer_class = UserImageSerializer
    queryset = UserImages.objects.all()

class UserImageUpdate(RetrieveUpdateDestroyAPIView):
    serializer_class = UserImageSerializer

urls.py

from django.conf.urls import url
from django.contrib import admin
from .views import UserImageUpload, UserImageUpdate

urlpatterns = [
    url(r'^user-create/$', UserImageUpload.as_view()),
    url(r'^user-update/(?P<pk>[0-9]+)/$', UserImageUpdate.as_view()),
];

Making post/put request.

Here is the API calling code of IOS

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.requestSerializer = [AFHTTPRequestSerializer serializer];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    NSURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:@"http://192.168.0.116:8001/user-create/" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFormData:imageData name:@"userProfilePicture"];
    } error:&error];
    AFHTTPRequestOperation *operation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"%@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", [[NSString alloc] initWithData:operation.responseData encoding:NSUTF8StringEncoding]);
    }];
    [manager.operationQueue addOperation:operation];

while running python manage.py makemigrations i am getting error

models.py

• class Post(models.Model):
  parent = models.ForeignKey("self", blank=True, null=True)
  user = models.ForeignKey(settings.AUTH_USER_MODEL)
  content = models.CharField(max_length=2000, validators=[validate_content])
  post_images = models.ImageField(upload_to='posts/')
  liked = models.ManyToManyField(settings.AUTH_USER_MODEL, blank=True, related_name='liked')
  reply = models.BooleanField(verbose_name='Is a reply?', default=False)
  updatd = models.DateTimeField(auto_now=True)
  timestamp = models.DateTimeField(auto_now_add=True)
  objects = PostManager()

here another image_upload_to part is in same models.py but it is in comment

remember this section( image_upload_to) is in comment

• def image_upload_to(instance, filename):
  content = instance.post.content
  slug = slugify(content)
  basename, file_extension = filename.split(".")
  new_filename = "%s-%s.%s" %(slug, instance.id, file_extension)
  return "posts/%s/%s" %(slug, new_filename)
  class PostImages(models.Model):
  post = models.ForeignKey(Post)
  image = models.FileField(upload_to=image_upload_to, blank=True, null=True)
  def str(self):
  return self.post.content

error is:

field=models.ImageField(blank=True, null=True, upload_to=posts.models.image_upload_to), AttributeError: module 'posts.models' has no attribute 'image_upload_to'
how it possible this part (field=models.ImageField(blank=True, null=True, upload_to=posts.models.image_upload_to) is in comment any idea?

I'm following you tutorial on the blog(Django 1.5 version) and I'm using Django 1.6. For some reason, the Archive Months side bar is not showing the months. It seems like the list for months and years is not being created, and therfore not shown. in list.html I am using:
{% block sidebar %}

Monthly Archive

    {% for ym in view.months %}
       {% ifchanged ym.0 %} {{ ym.0 }} <br /> {% endifchanged %}
        <a href="{% url 'archive_month' ym.0 ym.1 %}">{{ ym.2 }}</a> <br /> 
       
    {% endfor %}

{% endblock %}

and in views.py the code for creating the list of archive months is:

Imports {{{

import time
from calendar import month_name

from travelblog.models import *
from travelblog.forms import *
from masudtravels.shared.utils import *

from masudtravels.mcbv.list import ListView
from masudtravels.mcbv.list_custom import DetailListCreateView

}}}

allpost = Post
class PostView(DetailListCreateView):
"""Show post, associated comments and an 'add comment' form."""
detail_model = Post
list_model = Comment
modelform_class = CommentForm
related_name = "comments"
fk_attr = "post"
template_name = "post.html"

class Main(ListView):
list_model = Post
paginate_by = 10
template_name = "list.html"

def months(self):
    """Make a list of months to show archive links."""
    if not Post.obj.count(): return list()

    # set up variables
    current_year, current_month = time.localtime()[:2]
    first       = Post.obj.order_by("created")[0]
    first_year  = first.created.year
    first_month = first.created.month
    months      = list()

    # loop over years and months
    for year in range(current_year, first_year-1, -1):
        start, end = 12, 0
        if year == current_year : start = current_month
        if year == first_year   : end = first_month - 1

        for month in range(start, end, -1):
            if Post.obj.filter(created__year=year, created__month=month):
                months.append((year, month, month_name[month]))
    return months

class ArchiveMonth(Main):
paginate_by = None

def get_list_queryset(self):
    year, month = self.args
    return Post.obj.filter(created__year=year, created__month=month).order_by("created")

and in base.html i am using:

{% block sidebar %}{% endblock %}

Thank you in advance for your help!

my main url is:
url(r'^posts/', include("posts.urls", namespace="posts")),

my app url is:
url(r'^(?P<pk>\d+)/update/$', PostUpdateView.as_view(), name='update'),

i am trying to access it in my template like this:
<small> <a href='{% url 'posts:update' %}'>***</a></small>

and getting this error:
NoReverseMatch at /
Reverse for 'update' with no arguments not found. 1 pattern(s) tried: ['posts/(?P\d+)/update/$']

You seem to be using the django-registration app, but the templates for it do not exist.

when I run sudo python manage.py runserver 0.0.0.0:8000, I get the error:
.......
django.core.exceptions.ImproperlyConfigured: The SECRET_KEY setting must not be empty.

how to solve it? thanks

test issues

when i run the command python manage.py runserver getting this ERROR -
server - Error trying to receive messages: Error 10061 connecting to localhost:6379. No connection could be made because the target machine actively refused it. now what i have to do.

When trying to import the portfolio app from this code into a new django project. There is an error that comes up of TemplateDoesNotExist where it is specifically looking for group_list.html that is mentioned in the list.html template.