Currently, I am working on a DFR project where can successfully get all data but i need some modify with the json data.
Here Is the code
class PermissionSerializers(serializers.ModelSerializer):
class Meta:
model = Permission
fields = ['id', 'name', 'codename']
def to_representation(self, instance):
return {
'model': instance.content_type.name,
'data' :{
'id': instance.id,
'name': instance.name,
'codename': instance.codename,
}
}
And i get this JSON format,
{
"next": "http://127.0.0.1:8000/en/ga/api-version/common/admin/permissions/?page=4",
"previous": "http://127.0.0.1:8000/en/ga/api-version/common/admin/permissions/?page=2",
"total": 33,
"page": 3,
"page_size": 10,
"results": [
{
"model": "user",
"data": {
"id": 25,
"name": "Can add user",
"codename": "add_user"
}
},
{
"model": "user",
"data": {
"id": 29,
"name": "Admistrative Access",
"codename": "admin_access"
}
},
But I want to modify with something like this which has model name on top and then all available data inside a dictionary:
{
"model": "user",
"data": {
"id": 26,
"name": "Can change user",
"codename": "change_user"
},
{
"id": 25,
"name": "Can add user",
"codename": "add_user"
},
},
You get something like this because you have pagination in your API, if you don't want it just disable pagination.
I came up with this solution:
def list(self, request):
_models_list = [
'organization','user','group', 'logentry', 'organizationtype',
'keyword', 'productsupport','feedbacksupport','twittercredential']
models = ContentType.objects.filter(model__in = _models_list)
model_dict = {
'model': '',
'data':''
}
results = []
for model in models:
_permissions = []
access = ' Access'
if model.model == 'group':
model_dict['model'] = 'Role'+ access
elif model.model == 'organizationtype':
model_dict['model'] = 'Organization Type'+ access
elif model.model == 'productsupport':
model_dict['model'] = 'Product'+ access
elif model.model == 'feedbacksupport':
model_dict['model'] = 'Feedback'+ access
else:
model_dict['model'] = model.model.capitalize()+ access
permissions = Permission.objects.filter(content_type = model)
for premission in permissions:
_permissions.append(premission)
serializer = PermissionSerializers(_permissions, many=True)
data = serializer.data
model_dict['data'] = data
results.append(model_dict.copy())
return Response(results)
Related
I have 4 models Category, Vendor, Location, Product. Vendor fall under the Category model (vendor is a foreign key to category). The remaining models are under Vendor (Location, Product)
ProductSerializer and LocationSerializer are nested to VendorSerializer, and VendorSerializer is nested to CategorySerializer.
class ProductSerializer(WritableNestedModelSerializer):
class Meta:
model = Product
fields = ['id', 'item_name', 'price']
read_only_fields = ['id']
class LocationSerializer(WritableNestedModelSerializer):
class Meta:
model = Location
fields = ['place']
class VendorSerializer(WritableNestedModelSerializer):
vendor_location = LocationSerializer()
product = ProductSerializer(many=True)
class Meta:
model = Vendor
fields = ['vendor_name','vendor_location','product']
read_only_fields = ['id']
class CategorySerializer(WritableNestedModelSerializer):
vendor = VendorSerializer(many=True)
class Meta:
model = Category
fields = ['id', 'category_name', 'tittle', 'vendor']
read_only_fields = ['id']
# View
class ProductView(APIView):
permission_classes = [IsAuthenticated]
def get(self, request, format=None, *args, **kwargs):
products = Category.objects.all()
serializer = CategorySerializer(products, many=True, context={'request': request})
return Response({'response': 'ok', 'result': serializer.data})
# Output
{
"response": "ok",
"result": [
{
"id": 1,
"category_name": "Cake",
"tittle": "test title",
"vendor": [
{
"vendor_name": "Test_Name",
"vendor_location": {
"place": "Test_Place"
},
"product": [
{
"id": 1,
"item_name": "test_1",
"price": 3200,
},
{
"id": 2,
"item_name": "test_2",
"price": 2010,
}
]
}
]
}
]
}
# Expected output
{
"response": "ok",
"result": [
{
"id": 1,
"category_name": "Cake",
"tittle": "test title",
"vendor": [
{
"vendor_name": "Test_Name",
"vendor_location": {
"place": "Test_Place"
},
"product": [
{
"id": 1,
"item_name": "test_1",
"price": 3200,
}
]
}
]
},
{
"id": 1,
"category_name": "Cake",
"tittle": "test title",
"vendor": [
{
"vendor_name": "Test_Name",
"vendor_location": {
"place": "Test_Place"
},
"product": [
{
"id": 2,
"item_name": "test_2",
"price": 2010,
}
]
}
]
}
]
}
In my output, two products are listed. There may be more than two. I only need one product under the product. All products must be printed in the same structure as I mentioned in expected output. How do I do this? Is it possible? Can someone help me do this?
You can modify this line:
# old:
products = Category.objects.all() # definately these are not products
# new:
products = Product.objects.values_list('id', flat=True) # get all products ids
categories = Category.objects.filter(vendor__product__in=products)
And send categories to CategorySerializer, thought this is still not what you want, as every duplicated category will hold information about all products (not only one).
Where I would go from this point? I'd create method get_product in VendorSerializer and somehow save information what Category/Vendor are we in right now and if we have already added a Product for this Category - I'd skip adding next.
PS. I still don't get why you need this format though.
So I have Chat Rooms and I have Messages. Then I have two urls: /messages and /rooms. And these display all your rooms and messages. Also a message can be assigned to a room. So in the Room API I have the messages assigned to that room.
Let's say that the room is called 'Room1' and the messages are 'hey', 'yo' and 'wassup'. If I make a request to just /messages I will get all of the messages. Let's say that only two of the messages are assigned to 'Room1' and the other message is assigned to another room not named.
I want a way to make a get request and only get those two messages assigned to 'Room1 with id = 3' (localhost:8000/rooms/3/messages) instead of: (localhost:8000/messages).
This is an example of when I make a get request to /rooms/3/
{
"id": 3,
"name": "Room 1",
"members": [
{
"id": 1,
"username": "william"
},
{
"id": 2,
"username": "eric"
},
{
"id": 3,
"username": "ryan"
}
],
"messages": [
{
"id": 7,
"content": "hej",
"date": "2019-07-08",
"sender": {
"id": 1,
"username": "william"
}
},
{
"id": 8,
"content": "yoyo",
"date": "2019-07-08",
"sender": {
"id": 2,
"username": "eric"
}
},
{
"id": 9,
"content": "tjo bror",
"date": "2019-07-08",
"sender": {
"id": 3,
"username": "ryan"
}
},
{
"id": 10,
"content": "hej jag heter Eric och jag gar pa polhemskolan i lund och jag ar 17 ar gammal",
"date": "2019-07-08",
"sender": {
"id": 2,
"username": "eric"
}
},
{
"id": 11,
"content": "vi vet hahah",
"date": "2019-07-09",
"sender": {
"id": 1,
"username": "william"
}
},
{
"id": 12,
"content": "amen sluta",
"date": "2019-07-09",
"sender": {
"id": 2,
"username": "eric"
}
}
]
}
This is what I want to get in response if I do rooms/3/messages:
"messages": [
{
"id": 7,
"content": "hej",
"date": "2019-07-08",
"sender": {
"id": 1,
"username": "william"
}
},
{
"id": 8,
"content": "yoyo",
"date": "2019-07-08",
"sender": {
"id": 2,
"username": "eric"
}
},
{
"id": 9,
"content": "tjo bror",
"date": "2019-07-08",
"sender": {
"id": 3,
"username": "ryan"
}
},
{
"id": 10,
"content": "hej jag heter Eric och jag gar pa polhemskolan i lund och jag ar 17 ar gammal",
"date": "2019-07-08",
"sender": {
"id": 2,
"username": "eric"
}
},
{
"id": 11,
"content": "vi vet hahah",
"date": "2019-07-09",
"sender": {
"id": 1,
"username": "william"
}
},
{
"id": 12,
"content": "amen sluta",
"date": "2019-07-09",
"sender": {
"id": 2,
"username": "eric"
}
}
]
}
Django Models:
class UserProfile(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
class Meta:
verbose_name_plural = 'All Users'
def __str__(self):
return self.user.username
#receiver(post_save, sender=User)
def create_user_data(sender, update_fields, created, instance, **kwargs):
if created:
user = instance
profile = UserProfile.objects.create(user=user)
class Message(models.Model):
sender = models.ForeignKey(UserProfile, on_delete=models.CASCADE, related_name="sendermessage")
content = models.CharField(max_length=500)
date = models.DateField(default=date.today)
canview = models.ManyToManyField(UserProfile, blank=True, related_name="messagecanview")
class Meta:
verbose_name_plural = 'Messages'
def __str__(self):
return "{sender}".format(sender=self.sender)
class Room(models.Model):
name = models.CharField(max_length=50)
members = models.ManyToManyField(UserProfile, blank=True)
messages = models.ManyToManyField(Message, blank=True)
class Meta:
verbose_name_plural = 'Rooms'
def __str__(self):
return "{name}".format(name=self.name)enter code here
Django Serializers:
class UserProfileSerializer(serializers.ModelSerializer):
username = serializers.CharField(source='user.username')
class Meta:
model = UserProfile
fields = ('id', 'username')
class MessageSerializer(serializers.ModelSerializer):
sender = UserProfileSerializer()
class Meta:
model = Message
fields = ('id', 'content', 'date', 'sender')
class RoomSerializer(serializers.ModelSerializer):
messages = MessageSerializer(many=True)
members = UserProfileSerializer(many=True)
class Meta:
model = Room
fields = ('id', 'name', 'members', 'messages')
Django Views:
class UserProfileView(viewsets.ModelViewSet):
http_method_names = ['get', 'post', 'put', 'delete', 'patch']
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer
class MessageView(viewsets.ModelViewSet):
http_method_names = ['get', 'post', 'put', 'delete', 'patch']
queryset = Message.objects.all()
serializer_class = MessageSerializer
class UserMessageView(MessageView):
def get_queryset(self):
return Message.objects.filter(canview__user=self.request.user)
class RoomView(viewsets.ModelViewSet):
http_method_names = ['get', 'post', 'put', 'delete', 'patch']
queryset = Room.objects.all()
serializer_class = RoomSerializer
class UserRoomView(RoomView):
def get_queryset(self):
return Room.objects.filter(members__user=self.request.user)
Django Urls:
router = routers.DefaultRouter()
router.register('users', views.UserProfileView),
router.register('rooms', views.UserRoomView),
router.register('messages', views.UserMessageView),
urlpatterns = [
path('', include(router.urls)),
]
To get all Messages assigned to a room, let's:
Install django-filter:
pip install django-filter
Modify the Room model to specify a related_name:
class Room(models.Model):
name = models.CharField(max_length=50)
members = models.ManyToManyField(UserProfile, blank=True)
messages = models.ManyToManyField(Message, blank=True, related_name='rooms')
# ^^^^^^^^^^^^^^^^^^^^^^
Enable filtering for the rooms related field:
import django_filters
import rest_framework.filters
[...]
class MessageView(viewsets.ModelViewSet):
# vvvvvvvvvvv I don't think this line is needed vvvvvvvvvvvvvv
# http_method_names = ['get', 'post', 'put', 'delete', 'patch']
queryset = Message.objects.all()
serializer_class = MessageSerialize
filter_backends = (
django_filters.rest_framework.DjangoFilterBackend,
rest_framework.filters.OrderingFilter,
)
filter_fields = ['rooms']
Then, you can request all messages for that room with a GET to:
localhost:8000/messages/?rooms=3
Comment question:
You also need to expose the Message object's sender field. Currently it is aliased:
class MessageSerializer(serializers.ModelSerializer):
# vvvv vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
sender_obj = UserProfileSerializer(source='sender', read_only=True)
class Meta:
model = Message
fields = ('id', 'content', 'date', 'sender', 'sender_obj')
# ^^^^^^^^^^^^^^
Then you can POST to /message with the data {"content": "blah", "date": "2019-07-09","sender": 1}
So I'm trying to create an /api/info url that return various data on my application. It pulls data from various models and puts it together in one response. I got the following:
class SessionInfo(generics.GenericAPIView):
def get(self, request, format=None):
token = Token.objects.get(user=self.request.user)
userprofile = UserProfile.objects.get(user=self.request.user)
is_admin = self.request.user.is_staff
is_primary_owner = userprofile.primary_owner
managers = userprofile.reports_to.all()
man = ["test manager 1", "test manager 2"]
pages = Page.objects.filter(published=True, show_in_menu=True)
pages_output = JSONRenderer().render(PageSerializer(pages).data)
content = {
'user': {
"username": str(self.request.user.username),
"first_name": str(self.request.user.first_name),
"last_name": str(self.request.user.last_name),
"is_admin": is_admin,
"is_primary_owner": is_primary_owner,
"api_token": token.key,
"timezone": 'blalala',
"managers": man,
},
'license': {
"plan" : "gold",
"expiry_date" : "lol",
},
'feature_flags': {
'billing_test': False,
},
'pages': { pages_output },
}
return Response(content)
However it doesn't properly serialize and render pages, making it an escaped string instead:
{
"feature_flags": {
"billing_test": false
},
"user": {
"username": "test#user.com",
"first_name": "Test",
"last_name": "User",
"is_admin": true,
"managers": [
"test manager 1",
"test manager 2"
],
"api_token": "08d1a5827da9a90e7746949ffd2e69e87c51b272",
"timezone": "blalala",
"is_primary_owner": false
},
"license": {
"expiry_date": "lol",
"plan": "gold"
},
"pages": [
"[{\"id\": 1, \"title\": \"Trololol\"}, {\"id\": 2, \"title\": \"NEW pages\"}]"
]
}
if I use directuly use pages_output = PageSerializer(pages) I get:
<webapp_api_v1.serializers.PageSerializer object at 0x10a0d8f90> is not JSON serializable
How can I make a serializer properly nest within my constructed response? Thanks!
Solved it with pages_output = PageSerializer(pages).data and changing 'pages': pages_output,
I have a rest serializer and i am getting this output(actual data in thousands). I am trying to filter this data such that it displays only the json where a condition is met. (in my case, student.student_id = 29722):
[
{
"student": {
"student_id": 29722,
"first_name": "Michaella",
"middle_name": "Helene",
"last_name": "Bonose",
"email": "",
"phone": null,
"cell_phone": null
},
"credits_completed": null,
"academic_program_gpa": null,
"primary_program": true,
"academic_program": {
"id": 595,
"acad_program_category": {
"id": 1,
"program_type": {
"id": 1,
"program_category_type": "Academic"
},
"title": "Associate in Arts"
},
"acad_program_type": {
"id": 2,
"program_type": "Associate Degree"
},
"acad_program_code": "AA.ARTS",
"program_title": "Associate in Arts Degree",
"required_credits": 60,
"min_gpa": 2.0,
"description": ""
}
},
{
"student": {
"student_id": 29722,
"first_name": "Michaella",
"middle_name": "Helene",
"last_name": "Bonose",
"email": "",
"phone": null,
"cell_phone": null
},
"credits_completed": null,
"academic_program_gpa": null,
"primary_program": true,
"academic_program": {
"id": 596,
"acad_program_category": {
"id": 2,
"program_type": {
"id": 1,
"program_category_type": "Academic"
},
"title": "Associate in Sciences"
},
"acad_program_type": {
"id": 2,
"program_type": "Associate Degree"
},
"acad_program_code": "AS.SCIENCE",
"program_title": "Associate in Sciences Degree",
"required_credits": 60,
"min_gpa": 2.0,
"description": ""
}
}, .......
Here is my APIView for this:
class StudentAcademicProgramList(APIView):
def get(self, request, format=None):
student_academic_program = Student_academic_program.objects.all()
serialized_Student_academic_program = StudentAcademicProgramSerializer(student_academic_program, many=True)
return Response(serialized_Student_academic_program.data)
class StudentAcademicProgramDetail(APIView):
def get_objects(self, pk):
try:
return Student_academic_program.object.get(pk=pk)
except Student_academic_program.DoesNotExist:
raise Http404
def get(self, request, pk, format=None):
student_academic_program = self.get_object(pk)
serialized_Student_academic_program = StudentAcademicProgramSerializer(student_academic_program)
return Response(serialized_Student_academic_program.data)
Hoe do i filter this such that it only displays the values where student.student_id = 29722 ?
Do you mean to filter StudentAcademicProgramList?
class StudentAcademicProgramList(APIView):
def get(self, request, format=None):
# This should be populated however you need it to be.
student_id = 29722
student_academic_program = Student_academic_program.objects.filter(student_id=student_id)
serialized_Student_academic_program = StudentAcademicProgramSerializer(student_academic_program, many=True)
return Response(serialized_Student_academic_program.data)
On my json output I don't seem to get key value pairs on my m2m field attribute_answers. see the code below. How to I add in the attribute_answers fields?
json
{
"id": 20,
"name": "Jake",
"active": true,
"type": {
"id": 1,
"name": "Human",
"active": true,
"created": "2013-02-12T13:31:06Z",
"modified": null
},
"user": "jason",
"attribute_answers": [
1,
2
]
}
Serializer
class ProfileSerializer(serializers.ModelSerializer):
user = serializers.SlugRelatedField(slug_field='username')
attribute_answers = serializers.PrimaryKeyRelatedField(many=True)
class Meta:
model = Profile
depth = 2
fields = ('id', 'name', 'active', 'type', 'user', 'attribute_answers')
def restore_object(self, attrs, instance=None):
"""
Create or update a new snippet instance.
"""
if instance:
# Update existing instance
instance.name = attrs.get('name', instance.name)
instance.active = attrs.get('active', instance.active)
instance.type = attrs.get('type', instance.type)
instance.attribute_answers = attrs.get('attribute_answers', instance.attribute_answers)
return instance
# Create new instance
return Profile(**attrs)
If I understand your question correctly, you want a Nested Relationship. In your ProfileSerializer, you'll want:
attribute_answers = AttributeAnswerSerializer(many=True)
This will display all the attributes of each associated attribute_answer model and give you something like:
{
"id": 20,
"name": "Jake",
"active": true,
"type": {
"id": 1,
"name": "Human",
"active": true,
"created": "2013-02-12T13:31:06Z",
"modified": null
},
"user": "jason",
"attribute_answers": [
{"id": 1, "foo": "bar"},
{"id": 2, "foo": "bar2"}
]
}