Enable ?page_size=1 in URL to fetch correct objects on schedules endpoint

awx/main/migrations/0135_schedule_sort_fallback_to_id.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.16 on 2021-03-29 15:30
+
+from django.db import migrations
+import django.db.models.expressions
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0134_unifiedjob_ansible_version'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='schedule',
+            options={'ordering': [django.db.models.expressions.OrderBy(django.db.models.expressions.F('next_run'), descending=True, nulls_last=True), 'id']},
+        ),
+    ]

awx/main/models/schedules.py

@@ -63,7 +63,7 @@ class ScheduleManager(ScheduleFilterMethods, models.Manager):
 class Schedule(PrimordialModel, LaunchTimeConfig):
     class Meta:
         app_label = 'main'
-        ordering = ['-next_run']
+        ordering = [models.F('next_run').desc(nulls_last=True), 'id']
         unique_together = ('unified_job_template', 'name')
 
     objects = ScheduleManager()