Add uuid field to label models

backend/data_export/migrations/0001_initial.py

@@ -0,0 +1,66 @@
+# Generated by Django 4.0.2 on 2022-05-12 02:27
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ("examples", "0006_alter_example_upload_name"),
+        ("labels", "0012_add_uuid_field"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ExportedCategory",
+            fields=[],
+            options={
+                "proxy": True,
+                "indexes": [],
+                "constraints": [],
+            },
+            bases=("labels.category",),
+        ),
+        migrations.CreateModel(
+            name="ExportedExample",
+            fields=[],
+            options={
+                "proxy": True,
+                "indexes": [],
+                "constraints": [],
+            },
+            bases=("examples.example",),
+        ),
+        migrations.CreateModel(
+            name="ExportedRelation",
+            fields=[],
+            options={
+                "proxy": True,
+                "indexes": [],
+                "constraints": [],
+            },
+            bases=("labels.relation",),
+        ),
+        migrations.CreateModel(
+            name="ExportedSpan",
+            fields=[],
+            options={
+                "proxy": True,
+                "indexes": [],
+                "constraints": [],
+            },
+            bases=("labels.span",),
+        ),
+        migrations.CreateModel(
+            name="ExportedText",
+            fields=[],
+            options={
+                "proxy": True,
+                "indexes": [],
+                "constraints": [],
+            },
+            bases=("labels.textlabel",),
+        ),
+    ]

backend/labels/migrations/0012_add_uuid_field.py

@@ -0,0 +1,34 @@
+# Generated by Django 4.0.2 on 2022-05-12 02:27
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("labels", "0011_remove_relation_direction"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="category",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, null=True),
+        ),
+        migrations.AddField(
+            model_name="relation",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, null=True),
+        ),
+        migrations.AddField(
+            model_name="span",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, null=True),
+        ),
+        migrations.AddField(
+            model_name="textlabel",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, null=True),
+        ),
+    ]

backend/labels/migrations/0013_populate_uuid_values.py

@@ -0,0 +1,27 @@
+# Generated by Django 4.0.2 on 2022-05-12 02:28
+
+from django.db import migrations
+
+import uuid
+
+
+def gen_uuid(apps, schema_editor):
+    Category = apps.get_model("labels", "Category")
+    Span = apps.get_model("labels", "Span")
+    Relation = apps.get_model("labels", "Relation")
+    TextLabel = apps.get_model("labels", "TextLabel")
+    for label in [Category, Span, Relation, TextLabel]:
+        for row in label.objects.all():
+            row.uuid = uuid.uuid4()
+            row.save(update_fields=["uuid"])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("labels", "0012_add_uuid_field"),
+    ]
+
+    operations = [
+        migrations.RunPython(gen_uuid, reverse_code=migrations.RunPython.noop),
+    ]

backend/labels/migrations/0014_remove_uuid_null.py

@@ -0,0 +1,33 @@
+import uuid
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("labels", "0013_populate_uuid_values"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="category",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, unique=True),
+        ),
+        migrations.AlterField(
+            model_name="relation",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, unique=True),
+        ),
+        migrations.AlterField(
+            model_name="span",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, unique=True),
+        ),
+        migrations.AlterField(
+            model_name="textlabel",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, unique=True),
+        ),
+    ]

backend/labels/models.py

@@ -1,3 +1,5 @@
+import uuid
+
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.db import models
@@ -16,6 +18,7 @@ from label_types.models import CategoryType, RelationType, SpanType
 class Label(models.Model):
     objects = LabelManager()
 
+    uuid = models.UUIDField(default=uuid.uuid4, unique=True)
     prob = models.FloatField(default=0.0)
     manual = models.BooleanField(default=False)
     user = models.ForeignKey(User, on_delete=models.CASCADE)