Following Part 1 of the tutorial fine until I got to the shell component, where I was told to type the following:

import io
stream = io.BytesIO(content)
data = JSONParser().parse(stream)
serializer = SnippetSerializer(data=data)
serializer.is_valid()

When I got here, False was returned, rather than True. I tried again copying all of the code for shell and got the same result.

url is deprecated since django 3.1

https://docs.djangoproject.com/en/3.2/ref/urls/#url

Hello! Thanks for the great tutorial.

I've found a redundant import statement in a section of Pt.1 that could be removed:

from rest_framework.renderers import JSONRenderer

Thanks, for less typing effort for future learners : )

Happy also to fix it and do a PR if that would help - just not sure where the page is built from.

The link below is not accessible. It show "Application error".

refer to below quote:
There is a live example API for testing purposes, available here.

when I tried to access '/docs', the error I wrote on the title came out.

As the version of Python specified in runtime.txt is not supported by Heroku 20.

To install requirements with a clean environment, appdirs, packaging and six need to be added to the requirements.txt (with python2).

has an error at line 5 ("/snippets/models.py")

currently is:
import from pygments.formatters HtmlFormatter

but I believe that is correct:
import from pygments.formatters.html HtmlFormatter

see:
https://pygments-doc.readthedocs.org/en/latest/formatters/html.html

In the first tutorial here : https://www.django-rest-framework.org/tutorial/1-serialization/ .
The completed online implementation as a sandbox version is not working , the link is https://restframework.herokuapp.com , it gives application error , maybe due to heroku not having a free plan anymore or heroku not supporting the python version .

In Tutorial 7: Schemas & client libraries, the Adding a schema section says that after installing coreapi and updating urls.py, corejson should be listed as an option in the GET dropdown menu at Api Root.

It does not appear, neither is it present in the sandbox example here

I was going through the excellent tutorial when I hit an error in part 4. It says to add the perform_create method to the SnippetList view in order to assign an owner to the snippets pre-save. This, however, gave me an IntegrityError saying the snippet did not have an owner_id.

I created this StackOverflow question, and the answer I got seemed to work.

It seems that for the generic ListView class, pre_save is the correct method for this and not perform_create.

I am new to the programming and following the tutorial as it is. But can't seem to get past the 4th chapter "Authentication and permissions". At the end of the tutorial I'm trying to create the snippet programmatically but I'm getting error "NOT NULL constraint failed: snippets_snippet.owner_id" . Am I missing something ?

I'd like to see snippets for authenticated user only.

I added IsOwner permission class to permission.py

class IsOwner(permissions.BasePermission):
    def has_object_permission(self, request, view, obj):
        return obj.owner == request.user

Changed permission_classes in SnippetViewSet:

    permission_classes = (
        permissions.IsAuthenticatedOrReadOnly,
        IsOwner, )

Created some users and snippets. But I see all snippets.
What do I need to do to see only authenticated user's snippets?

New to DRF.
The problem is when GET with
GET /snippets/?format=api
it returns

{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "url": "https://restframework.herokuapp.com/snippets/1/?format=api",
            "id": 1,
            "highlight": "https://restframework.herokuapp.com/snippets/1/highlight/?format=api",
            "owner": "admin",
            "title": "serializers.py",
            "code": "from django.contrib.auth.models import User, Group\r\n...",
            "linenos": false,
            "language": "python",
            "style": "default"
        }
    ]
}

And both
GET https://restframework.herokuapp.com/snippets/1/highlight/?format=api
GET https://restframework.herokuapp.com/snippets/1/highlight/?format=json
return 404 Not Found

For Parts 3 and 4 of the tutorial the SnippetDetail and UserDetail class views return all objects. I'm not sure if this is intended behaviour, I would think it should be a single item filtered by id? I don't know how I would do that with here though.

3-class-based-views

class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer

4-authentication-and-permissions

class UserDetail(generics.RetrieveAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer

您好，很抱歉我用的中文。
我根据你的教程写了代码，报错404， 然后下载您的代码发现跟教程的代码不一样？？

when runing command: python manage.py makemigrations snippets
there is an error: NameError: name 'STYLE_CHOICES' is not defined
what is the problem please?

On tutorial 4, http://www.django-rest-framework.org/tutorial/4-authentication-and-permissions/#adding-endpoints-for-our-user-models reference is made to the generics and no import is provided. All reference to generics is also no existent on the tutorial code on git.

I was able to find it here https://github.com/tomchristie/django-rest-framework/blob/master/rest_framework/generics.py and imported accordingly. However I believe it should be put on the documentation to save time to learers.

If you follow the docs, startproject automatically places some entries (as comments) in settings.py and urls.py , These entries are not really used.

As an example, in urls.py, we find

Uncomment the next line to enable the admin:

url(r'^admin/', include(admin.site.urls)),

In order to create consistency, we need to do something about them.
We have a number of options. We could:

1. Add them to the deployed sandbox,
2. Delete them as a part of the "Sandbox Deployment" commit,
3. Delete them as if they had never existed, or
4. Mention the deletion in docs/tutorial

Which is the preferred approach?

Once encode/django-rest-framework#5609 is released with DRF 3.8, it will be necessary to update the snippet urlpatterns to use router.urlpatterns instead of router.urls.

When I try to POST a snippet while not authenticated, Django returns:

ValueError at /snippets/
Cannot assign "<django.contrib.auth.models.AnonymousUser object at 0x7fda1f500470>": "Snippet.owner" must be a "User" instance.

Instead I expect something like the sandbox returns:

{
    "detail": "Authentication credentials were not provided."
}

I have double checked my code and as far as I can tell it is identical to the one in this repository.

Is there something I missed?

What is responsible for managing the unauthenticated requests?

Thanks.

Hi,
Great tutorial, thanks for putting it together. Found one issue in Tutorial 7 (https://www.django-rest-framework.org/tutorial/7-schemas-and-client-libraries/). To get the /schema/ endpoint to work in a browser, the pyyaml package is needed. This needs to be added to requirements.txt and also to the pip install line in the tutorial page above.
Thanks,
Ed

all in the question ;-)

Getting this message when attempting to run manage.py migrate:

django.db.utils.OperationalError: Problem installing fixture '/home/foo/rest-framework-tutorial/rest-framework-tutorial/snippets/fixtures/initial_data.json': Could not load auth.User(pk=2): no such table: auth_user

Same result if I remove the included tmp.db and allowing the app to create a fresh db.

Traceback (most recent call last):
File "/home/foo/rest-framework-tutorial/venv/lib/python3.4/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/home/foo/rest-framework-tutorial/venv/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py", line 485, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: auth_user

The above exception was the direct cause of the following exception:

Tutorial 5 introduces the root API endpoint as:

@api_view(('GET',))
def api_root(request, format=None):
    return Response({
        'users': reverse('user-list', request=request, format=format),
        'snippets': reverse('snippet-list', request=request, format=format)
    })

However, when class based views are introduced in Tutorial 3, we loose the names for the views. We might need something like this for api-root view to work:

url(r'^snippets/$', views.SnippetList.as_view(), name='snippet-list'),
url(r'^users/$', views.UserList.as_view(), name='user-list'),

Note the added name parameters for URLConf.

I get the following when I attempt tutorial 7. http://www.django-rest-framework.org/tutorial/7-schemas-and-client-libraries/

System check identified no issues (0 silenced).
July 19, 2016 - 19:12:01
Django version 1.8.5, using settings 'tutorial.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Internal Server Error: /
Traceback (most recent call last):
  File "/Users/harrymoreno/programming/django/drfTutorial/venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 119, in get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/Users/harrymoreno/programming/django/drfTutorial/venv/lib/python2.7/site-packages/django/core/urlresolvers.py", line 365, in resolve
    for pattern in self.url_patterns:
  File "/Users/harrymoreno/programming/django/drfTutorial/venv/lib/python2.7/site-packages/django/core/urlresolvers.py", line 401, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/Users/harrymoreno/programming/django/drfTutorial/venv/lib/python2.7/site-packages/django/core/urlresolvers.py", line 395, in urlconf_module
    self._urlconf_module = import_module(self.urlconf_name)
  File "/usr/local/Cellar/python/2.7.10/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/Users/harrymoreno/programming/django/rest-framework-tutorial/tutorial/urls.py", line 5, in <module>
    router = DefaultRouter(schema_title='foo')
TypeError: __init__() got an unexpected keyword argument 'schema_title'

As of Django 1.10, patterns does not exist. tutorial/urls.py attempts to import it, but it's no longer needed.

Django loads that Python module and looks for the variable urlpatterns. This should be a Python list of django.conf.urls.url() instances.
https://docs.djangoproject.com/en/1.10/topics/http/urls/#how-django-processes-a-request

The tutorial is a great guide in the low to high level features available but by the end only the most abstracted code is left and this is the only code in the example tutorial git repo.

It would be nice to have all the tutorial code available in similar fashion as the angualrjs tutorials where the learner can step through them one by one.

I'm getting the 2 errors while accessing the following urls

{
"snippets": "http://127.0.0.1:8000/snippets/snippets/",
"users": "http://127.0.0.1:8000/snippets/users/"
}

Error-1: Could not resolve URL for hyperlinked relationship using view name "snippet-detail". You may have failed to include the related model in your API, or incorrectly configured the lookup_field attribute on this field.

Error-2: Could not resolve URL for hyperlinked relationship using view name "user-detail". You may have failed to include the related model in your API, or incorrectly configured the lookup_field attribute on this field.

I am finished 4 - Authentication and permissions. And do login in superuser it can't run normal. Server error 500. User matching query does not exist. Look like user can't find in table. How to do can resolve. Make project normal run. Thanks.

Django version 1.10.2, using settings 'tutorial.settings'

File ".../site-packages/django/template/loader.py", line 25, in get_template
raise TemplateDoesNotExist(template_name, chain=chain)
django.template.exceptions.TemplateDoesNotExist: rest_framework/api.html

After running

./manage migrate
./manage runserver

then attempting to view http://127.0.0.1:8000/, the above error is raised.

The link in the readme leads to a 404. Should the link be updated to http://www.django-rest-framework.org/tutorial/1-serialization/ ?

I need to use this workaround to make the tutorial 06 run without any exceptions.

permissions.py:

from rest_framework import permissions
from django.core.paginator import Page

class IsOwnerOrReadOnly(permissions.BasePermission):

    def has_object_permission(self, request, view, obj):
        if request.method in permissions.SAFE_METHODS:
            return True

        if isinstance(obj, Page):
            for ob in obj:
                return ob.owner == request.user
        else:
            return obj.owner == request.user

This error will happen if paging enabled on settings.py.

AttributeError at /snippets/
'Page' object has no attribute 'owner'
Request Method: GET
Request URL:    http://localhost:8000/snippets/
Django Version: 1.7.1
Exception Type: AttributeError
Exception Value:    
'Page' object has no attribute 'owner'
Exception Location: /Users/taufik/Python/djangotutorial/tutorial/snippets/permissions.py in has_object_permission, line 8
Python Executable:  /Users/taufik/.virtualenvs/djangotutorial/bin/python
Python Version: 2.7.6
Python Path:    
['/Users/taufik/Python/djangotutorial/tutorial',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python27.zip',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/plat-darwin',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/plat-mac',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/plat-mac/lib-scriptpackages',
 '/Users/taufik/.virtualenvs/djangotutorial/Extras/lib/python',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/lib-tk',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/lib-old',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/lib-dynload',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/Users/taufik/.virtualenvs/djangotutorial/lib/python2.7/site-packages']
Server time:    Mon, 22 Dec 2014 15:39:19 +0000

Replacing encode/django-rest-framework#5074