Uids: change uids to be much shorter and base62 for non-chunks.

django_etesync/migrations/0020_auto_20200310_1438.py

@@ -0,0 +1,29 @@
+# Generated by Django 3.0.3 on 2020-03-10 14:38
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0019_collectionmember'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='collection',
+            name='uid',
+            field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID', regex='[a-zA-Z0-9]{24}')]),
+        ),
+        migrations.AlterField(
+            model_name='collectionitem',
+            name='uid',
+            field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID', regex='[a-zA-Z0-9]{24}')]),
+        ),
+        migrations.AlterField(
+            model_name='collectionitemchunk',
+            name='uid',
+            field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Expected a 256bit base64url.', regex='^[a-zA-Z0-9\\-_]{43}=?$')]),
+        ),
+    ]

django_etesync/migrations/0021_auto_20200310_1439.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.3 on 2020-03-10 14:39
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0020_auto_20200310_1438'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='collection',
+            name='uid',
+            field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID', regex='[a-zA-Z0-9]')]),
+        ),
+        migrations.AlterField(
+            model_name='collectionitem',
+            name='uid',
+            field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID', regex='[a-zA-Z0-9]')]),
+        ),
+    ]