changed parentId for first batch to null

Author: Ronak-23

backend/family_tree/family_tree/urls.py

@@ -17,10 +17,11 @@
 from django.urls import include, path
 from graphene_django.views import GraphQLView
 from student.views import upload
+from django.views.decorators.csrf import csrf_exempt
 
 urlpatterns = [
     path('admin/', admin.site.urls),
-    path("graphql", GraphQLView.as_view(graphiql=True)),
+    path("graphql", csrf_exempt(GraphQLView.as_view(graphiql=True))),
     path('students/', include('student.urls')),
     path('importexcel/', upload),
 ]

backend/family_tree/student/models.py

@@ -15,7 +15,7 @@ class Student(models.Model):
     socialMedia= models.ForeignKey(SocialMedia, on_delete=models.CASCADE, default=None, blank=True, null=True)
     linkedIn= models.URLField(max_length=200)
     email= models.EmailField(max_length=254)
-    parentId= models.CharField(max_length=400)
+    parentId= models.CharField(max_length=400,  default=None, blank=True, null=True)
 
 
 

backend/family_tree/student/schema.py

@@ -13,7 +13,7 @@ def tree_for_batch(root,info,batch):
     for student in batch:
         roll= student.roll_no
         pathObjects=[]
-        while(Student.objects.get(roll_no=roll).parentId!="root"):
+        while(Student.objects.get(roll_no=roll).parentId!=None):
             student=Student.objects.get(roll_no=roll)
             pathObjects.append(student)
             roll= student.parentId
@@ -37,7 +37,7 @@ def resolve_children(root, info, parentId):
 
     def resolve_student_path(root, info, roll):
         pathObjects=[]
-        while(Student.objects.get(roll_no=roll).parentId!="root"):
+        while(Student.objects.get(roll_no=roll).parentId!=None):
             student=Student.objects.get(roll_no=roll)
             pathObjects.append(student)
             roll= student.parentId

backend/family_tree/student/tests.py

@@ -10,7 +10,7 @@ class StudentTestCases(GraphQLTestCase):
 
     def setUp(self):
         super().setUp()
-        self.student1 = mixer.blend(Student, name='student1', roll_no='1', parentId='root')
+        self.student1 = mixer.blend(Student, name='student1', roll_no='1', parentId=None)
         self.student2 = mixer.blend(Student, name='student2', roll_no='2', parentId='1')
         self.student3 = mixer.blend(Student, name='student3', roll_no='3', parentId='1')
         self.student4 = mixer.blend(Student, name='student4', roll_no='4', parentId='1')