replace JSONField in models with a TextField for PostgreSQL

PostgreSQL is giving error:
could not identify an equality operator for type json

This bug report is about the issue:
rpkilby/jsonfield#47

introsite/futuintro/models.py

@@ -1,7 +1,6 @@
 from django.conf import settings
 from django.contrib.auth.models import AbstractBaseUser, BaseUserManager
 from django.db import models
-from jsonfield import JSONField
 
 
 class FutuUserManager(BaseUserManager):
@@ -151,7 +150,7 @@ class SchedulingRequest(models.Model):
     """
 
     # the JSON format is documented in views.createSchedules
-    json = JSONField()
+    json = models.TextField()
     requestedBy = models.ForeignKey(settings.AUTH_USER_MODEL, null=True,
             blank=True, on_delete=models.SET_NULL)
     requestedAt = models.DateTimeField(auto_now_add=True)
@@ -195,7 +194,7 @@ class Event(models.Model):
 
     It may belong to several Schedules (e.g. a collective event).
     """
-    json = JSONField()
+    json = models.TextField()
     schedules = models.ManyToManyField(Schedule)
 
     # Be able to group events by the template they came from (e.g. you didn't

introsite/futuintro/tasksched.py

@@ -127,7 +127,7 @@ def makeEventTasks():
     try:
         UM = get_user_model()
         schedReq = SchedulingRequest.objects.get(id=modelId)
-        body = schedReq.json
+        body = json.loads(schedReq.json)
         schedTempl = ScheduleTemplate.objects.get(
             id=body['scheduleTemplate'])
         schedules = makeSchedules()
@@ -170,7 +170,8 @@ def processEventTask(modelId):
                 evTask.summary, evTask.description,
                 locTxt, evTask.startDt, evTask.endDt,
                 schedTempl.timezone.name, attendingEmails)
-        newEv = Event.objects.create(json=gCalJson, template=evTask.template)
+        newEv = Event.objects.create(json=json.dumps(gCalJson),
+                template=evTask.template)
         newEv.schedules.add(*schedules)
     except:
         logging.error(traceback.format_exc())
@@ -208,7 +209,8 @@ def processCleanupSchedulingRequest(modelId):
         for event in schedule.event_set.all():
             sleepForRateLimit()
             try:
-                calendar.deleteEvent(calendar.futuintroCalId, event.json['id'])
+                calendar.deleteEvent(calendar.futuintroCalId,
+                        json.loads(event.json)['id'])
             except:
                 logging.error(traceback.format_exc())
             event.delete()

introsite/futuintro/views.py

@@ -63,7 +63,7 @@ def createSchedules(request):
 
     if request.method == 'POST':
         schedReq = models.SchedulingRequest.objects.create(
-                json=json.load(request),
+                json=json.dumps(json.load(request)),
                 requestedBy=request.user,
                 status=models.SchedulingRequest.IN_PROGRESS)
         tasksched.enqueue(tasksched.SCHED_REQ, schedReq.id)

req.txt

@@ -6,4 +6,3 @@ gdata
 python-dateutil
 pytz
 django-extensions
-jsonfield