Add min/max validation for date, datetime, and number questions (#1858)

src/pretix/base/migrations/0171_auto_20201126_1635.py

@@ -0,0 +1,49 @@
+# Generated by Django 3.0.11 on 2020-11-26 16:35
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0170_remove_hidden_urls'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='question',
+            name='valid_date_max',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='valid_date_min',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='valid_datetime_max',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='valid_datetime_min',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='valid_number_max',
+            field=models.DecimalField(decimal_places=6, max_digits=16, null=True),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='valid_number_min',
+            field=models.DecimalField(decimal_places=6, max_digits=16, null=True),
+        ),
+        migrations.AlterField(
+            model_name='seat',
+            name='product',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='seats', to='pretixbase.Item'),
+        ),
+    ]