Added DEFAULT_SCHOOL_ID

The DEFAULT_SCHOOL_ID is used as long as we have only one school.
That simplifies some code for now.

server/user/models.py

@@ -6,6 +6,8 @@ from django.db import models
 from django.db.models import Q
 from django.utils.translation import ugettext_lazy as _
 
+DEFAULT_SCHOOL_ID = 1
+
 
 class User(AbstractUser):
     def get_school_permissions(self, school):
@@ -23,15 +25,15 @@ class User(AbstractUser):
         :return: django permissions and school permissions for single default school
         """
         django_permissions = super().get_all_permissions(obj)
-        return django_permissions.union(self.get_school_permissions(School.objects.get(pk=1)))
+        return django_permissions.union(self.get_school_permissions(School.objects.get(pk=DEFAULT_SCHOOL_ID)))
 
 
 class School(models.Model):
     name = models.CharField(_(u'Name'), max_length=100, null=False, blank=False)
 
     @classmethod
-    def create_school(cls, name):
-        school = School(name=name)
+    def create_school(cls, name, id=None):
+        school = School(name=name, id=id)
         school.save()
         # Label.create_labels_for_school(school)
         SchoolRole.objects.create_default_roles_for_school(school)

server/user/services.py

@@ -1,10 +1,10 @@
 from core.factories import UserFactory
 from user.factories import UserGroupFactory
-from user.models import School, SchoolRole, UserSchoolRole
+from user.models import School, SchoolRole, UserSchoolRole, DEFAULT_SCHOOL_ID
 
 
 def create_school_with_users(school_name):
-    school = School.create_school(school_name)
+    school = School.create_school(school_name, id=DEFAULT_SCHOOL_ID)
 
     teacher_role = SchoolRole.objects.get_default_teacher_role_for_school(school)
     teacher = UserFactory(username='teacher')