feat(pricing): add workspace user rates and price units

apps/workspaces/migrations/0002_workspaceuserrate.py

@@ -0,0 +1,89 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("workspaces", "0001_initial"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="WorkspaceUserRate",
+            fields=[
+                ("id", models.UUIDField(default=uuid.uuid7, primary_key=True, serialize=False)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("deleted_at", models.DateTimeField(blank=True, null=True)),
+                ("is_deleted", models.BooleanField(default=False)),
+                ("is_active", models.BooleanField(default=False)),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="created_workspaces_workspaceuserrate_set",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "updated_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="updated_workspaces_workspaceuserrate_set",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                ("hourly_rate", models.DecimalField(decimal_places=2, max_digits=10)),
+                ("currency", models.CharField(default="USD", max_length=3)),
+                ("effective_from", models.DateTimeField()),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="workspace_rates",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "workspace",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="user_rates",
+                        to="workspaces.workspace",
+                    ),
+                ),
+            ],
+            options={
+                "db_table": "workspace_user_rate",
+                "ordering": ("-effective_from",),
+            },
+        ),
+        migrations.AddIndex(
+            model_name="workspaceuserrate",
+            index=models.Index(fields=["id"], name="workspaceuserrate_id_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="workspaceuserrate",
+            index=models.Index(fields=["workspace"], name="wur_workspace_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="workspaceuserrate",
+            index=models.Index(fields=["user"], name="wur_user_idx"),
+        ),
+        migrations.AddConstraint(
+            model_name="workspaceuserrate",
+            constraint=models.UniqueConstraint(
+                condition=models.Q(("is_deleted", False)),
+                fields=("workspace", "user"),
+                name="unique_workspace_user_rate",
+            ),
+        ),
+    ]