Convert final field from CommaSeparatedIntegerField to CharField.

common/djangoapps/course_modes/migrations/0010_archived_suggested_prices_to_charfield.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import re
+import django.core.validators
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course_modes', '0009_suggested_prices_to_charfield'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='coursemodesarchive',
+            name='suggested_prices',
+            field=models.CharField(default=b'', max_length=255, blank=True, validators=[django.core.validators.RegexValidator(re.compile('^[\\d,]+\\Z'), 'Enter only digits separated by commas.', 'invalid')]),
+        ),
+    ]

common/djangoapps/course_modes/models.py

@@ -810,7 +810,8 @@ class CourseModesArchive(models.Model):
     min_price = models.IntegerField(default=0)
 
     # the suggested prices for this mode
-    suggested_prices = models.CommaSeparatedIntegerField(max_length=255, blank=True, default='')
+    suggested_prices = models.CharField(max_length=255, blank=True, default='',
+                                        validators=[validate_comma_separated_integer_list])
 
     # the currency these prices are in, using lower case ISO currency codes
     currency = models.CharField(default="usd", max_length=8)