Changes to OperationTree model

Author: summerhenson

sasdata/fair_database/data/migrations/0013_remove_operationtree_parent_operation_and_more.py

@@ -0,0 +1,39 @@
+# Generated by Django 5.1.6 on 2025-03-19 20:20
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("data", "0012_remove_metadata_raw_metadata_and_more"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="operationtree",
+            name="parent_operation",
+        ),
+        migrations.AddField(
+            model_name="operationtree",
+            name="parent_operation1",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="child_operations1",
+                to="data.operationtree",
+            ),
+        ),
+        migrations.AddField(
+            model_name="operationtree",
+            name="parent_operation2",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="child_operations2",
+                to="data.operationtree",
+            ),
+        ),
+    ]

sasdata/fair_database/data/models.py

@@ -119,14 +119,28 @@ class OperationTree(models.Model):
     dataset = models.ForeignKey(DataSet, on_delete=models.CASCADE)
 
     # operation
+    # TODO: restrict to list of operations
     operation = models.CharField(max_length=10)
 
     # parameters
     parameters = models.JSONField(default=dict)
 
     # previous operation
-    parent_operation = models.ForeignKey(
-        "self", blank=True, null=True, on_delete=models.CASCADE
+    parent_operation1 = models.ForeignKey(
+        "self",
+        blank=True,
+        null=True,
+        on_delete=models.CASCADE,
+        related_name="child_operations1",
+    )
+
+    # optional second previous operation for binary operations
+    parent_operation2 = models.ForeignKey(
+        "self",
+        blank=True,
+        null=True,
+        on_delete=models.CASCADE,
+        related_name="child_operations2",
     )