Add validations for negative values in inventory and min quanityt (#2005

)

Add validations for negative values in inventory

Co-authored-by: Aakash Singh <mail@singhaakash.dev>

care/facility/migrations/0422_alter_facilityinventorylog_quantity_and_more.py

@@ -0,0 +1,27 @@
+# Generated by Django 4.2.10 on 2024-03-22 11:21
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("facility", "0421_merge_20240318_1434"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="facilityinventorylog",
+            name="quantity",
+            field=models.FloatField(
+                default=0, validators=[django.core.validators.MinValueValidator(0.0)]
+            ),
+        ),
+        migrations.AlterField(
+            model_name="facilityinventoryminquantity",
+            name="min_quantity",
+            field=models.FloatField(
+                default=0, validators=[django.core.validators.MinValueValidator(0.0)]
+            ),
+        ),
+    ]

care/facility/models/inventory.py

@@ -1,4 +1,5 @@
 from django.contrib.auth import get_user_model
+from django.core.validators import MinValueValidator
 from django.db import models
 from django.db.models import Index
 
@@ -108,7 +109,7 @@ class FacilityInventoryLog(FacilityBaseModel, FacilityRelatedPermissionMixin):
     )
     current_stock = models.FloatField(default=0)
     quantity_in_default_unit = models.FloatField(default=0)
-    quantity = models.FloatField(default=0)
+    quantity = models.FloatField(default=0, validators=[MinValueValidator(0.0)])
     unit = models.ForeignKey(
         FacilityInventoryUnit, on_delete=models.SET_NULL, null=True, blank=False
     )
@@ -157,7 +158,7 @@ class FacilityInventoryMinQuantity(FacilityBaseModel, FacilityRelatedPermissionM
     item = models.ForeignKey(
         FacilityInventoryItem, on_delete=models.SET_NULL, null=True, blank=False
     )
-    min_quantity = models.FloatField(default=0)
+    min_quantity = models.FloatField(default=0, validators=[MinValueValidator(0.0)])
 
     class Meta:
         constraints = [