first commit

backend/apps/farms/migrations/0004_retarget_cycles_flock_fk.py

@@ -0,0 +1,59 @@
+# Generated by Django 5.2.17 on 2026-08-19
+
+from django.db import migrations
+
+
+def retarget_cycles_flock_fk(apps, schema_editor):
+    connection = schema_editor.connection
+    if connection.vendor != "sqlite":
+        return
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT sql FROM sqlite_master WHERE name='cycles'")
+        row = cursor.fetchone()
+        if not row or "flock_old" not in (row[0] or ""):
+            return
+        cursor.execute("PRAGMA foreign_keys=OFF")
+        cursor.execute("ALTER TABLE cycles RENAME TO cycles_old")
+        cursor.execute(
+            """
+            CREATE TABLE cycles (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                total_days integer NOT NULL,
+                start_date date NOT NULL,
+                end_date date NOT NULL,
+                doc_in_weight integer NOT NULL,
+                doc_in_count integer NOT NULL,
+                created_at datetime NOT NULL,
+                updated_at datetime NOT NULL,
+                flock_id bigint NOT NULL REFERENCES flock(id) DEFERRABLE INITIALLY DEFERRED,
+                kandang_id bigint NOT NULL REFERENCES kandang(id) DEFERRABLE INITIALLY DEFERRED,
+                status varchar(30) NOT NULL,
+                CONSTRAINT chk_cycles_date_range CHECK (end_date >= start_date)
+            )
+            """
+        )
+        cursor.execute(
+            """
+            INSERT INTO cycles (
+                id, total_days, start_date, end_date, doc_in_weight, doc_in_count,
+                created_at, updated_at, flock_id, kandang_id, status
+            )
+            SELECT
+                id, total_days, start_date, end_date, doc_in_weight, doc_in_count,
+                created_at, updated_at, flock_id, kandang_id, status
+            FROM cycles_old
+            """
+        )
+        cursor.execute("DROP TABLE cycles_old")
+        cursor.execute("PRAGMA foreign_keys=ON")
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("farms", "0003_flock_cycle_nullable"),
+    ]
+
+    operations = [
+        migrations.RunPython(retarget_cycles_flock_fk, migrations.RunPython.noop),
+    ]