sample api work

apps/crud/admin.py

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+from django.contrib import admin
+from .models import Plan, Data
+
+
+admin.site.register(Data)
+admin.site.register(Plan)

apps/crud/apps.py

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+from django.apps import AppConfig
+
+
+class CrudConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'apps.crud'

apps/crud/models.py

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+from django.db import models
+from apps.gooyal_oauth2.models import Application
+from apps.users.models import User
+
+
+class Plan(models.Model):
+    application = models.ForeignKey(Application, on_delete=models.PROTECT)
+    client_id = models.CharField(max_length=255, null=True, blank=True)
+    owner = models.ForeignKey(User, on_delete=models.PROTECT)
+    record_count = models.IntegerField(default=0)
+    record_limit = models.IntegerField(default=0)
+
+
+class Data(models.Model):
+    user = models.ForeignKey(User, on_delete=models.PROTECT)
+    plan = models.ForeignKey(Plan, on_delete=models.PROTECT)
+    data = models.JSONField(default=dict)
+
+    class Meta:
+        unique_together = ('user', 'plan')

apps/crud/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

apps/crud/views.py

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+from django.http import Http404
+from django.shortcuts import render
+from oauth2_provider.contrib.rest_framework import TokenMatchesOASRequirements
+from rest_framework import viewsets, mixins
+from rest_framework.generics import get_object_or_404
+from rest_framework.viewsets import GenericViewSet
+
+from apps.crud.models import Data, Plan
+from apps.crud.serializers import DataSerializer
+from apps.gooyal_oauth2.rest_framework import IsAuthenticatedOrTokenMatchesOASRequirements
+
+
+class DataViewSet(mixins.RetrieveModelMixin,
+                  mixins.UpdateModelMixin,
+                  mixins.DestroyModelMixin,
+                  GenericViewSet):
+    queryset = Data.objects.all()
+    serializer_class = DataSerializer
+
+    permission_classes = [IsAuthenticatedOrTokenMatchesOASRequirements]
+    required_alternate_scopes = {
+        "GET": [["data_crud.data:retrieve"]],
+        "PATCH": [["data_crud.data:update"]],
+        "PUT": [["data_crud.data:update"]],
+        "DELETE": [["data_crud.data:delete"]],
+    }
+
+    def get_object(self):
+        user = self.request.user
+        auth = self.request.auth
+        if auth:
+            plan = Plan.objects.filter(application_id=auth.application_id).first()
+            data, created = Data.objects.get_or_create(plan_id=plan.pk, user=user)
+            return data
+
+        raise Http404