DENG-17 Make schedules and schedulehistory the same (#23419)

openedx/core/djangoapps/schedules/migrations/0019_auto_20200316_1935.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.28 on 2020-03-16 19:35
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('schedules', '0018_readd_historicalschedule_fks'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='schedule',
+            name='enrollment',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='student.CourseEnrollment'),
+        ),
+        migrations.AlterField(
+            model_name='schedule',
+            name='start_date',
+            field=models.DateTimeField(db_index=True, default=None, help_text='Date this schedule went into effect', null=True),
+        ),
+        migrations.AlterField(
+            model_name='scheduleexperience',
+            name='schedule',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='experience', to='schedules.Schedule'),
+        ),
+    ]

openedx/core/djangoapps/schedules/models.py

@@ -14,7 +14,7 @@ class Schedule(TimeStampedModel):
     .. no_pii:
     """
 
-    enrollment = models.OneToOneField('student.CourseEnrollment', null=False, on_delete=models.CASCADE, db_constraint=False)
+    enrollment = models.OneToOneField('student.CourseEnrollment', null=False, on_delete=models.CASCADE)
     active = models.BooleanField(
         default=True,
         help_text=_('Indicates if this schedule is actively used')
@@ -70,5 +70,5 @@ class ScheduleExperience(models.Model):
         (1, 'course_updates', u'Course Updates')
     )
 
-    schedule = models.OneToOneField(Schedule, related_name='experience', on_delete=models.CASCADE, db_constraint=False)
+    schedule = models.OneToOneField(Schedule, related_name='experience', on_delete=models.CASCADE)
     experience_type = models.PositiveSmallIntegerField(choices=EXPERIENCES, default=EXPERIENCES.default)