UPDATE

yield_harvest/models.py

@@ -0,0 +1,32 @@
+import uuid as uuid_lib
+
+from django.db import models
+
+from farm_hub.models import FarmHub
+
+
+class YieldHarvestPredictionLog(models.Model):
+    uuid = models.UUIDField(default=uuid_lib.uuid4, unique=True, editable=False, db_index=True)
+    farm = models.ForeignKey(
+        FarmHub,
+        on_delete=models.CASCADE,
+        related_name="yield_harvest_predictions",
+        null=True,
+        blank=True,
+    )
+    yield_stats = models.CharField(max_length=64, blank=True, default="")
+    yield_chip_text = models.CharField(max_length=32, blank=True, default="")
+    harvest_date = models.DateField(null=True, blank=True)
+    days_until_harvest = models.IntegerField(null=True, blank=True)
+    optimal_window_start = models.DateField(null=True, blank=True)
+    optimal_window_end = models.DateField(null=True, blank=True)
+    chart_data = models.JSONField(default=dict, blank=True)
+    fetched_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "yield_harvest_prediction_logs"
+        ordering = ["-fetched_at"]
+
+    def __str__(self):
+        farm_label = str(self.farm_id) if self.farm_id else "no-farm"
+        return f"{farm_label} — {self.yield_stats} harvest:{self.harvest_date}"