Create PartStocktake model

Model for representing stocktake entries against any given part

InvenTree/part/migrations/0091_partstocktake.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.16 on 2022-12-16 01:59
+
+from django.conf import settings
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('part', '0090_auto_20221115_0816'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PartStocktake',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quantity', models.DecimalField(decimal_places=5, help_text='Total available stock at time of stocktake', max_digits=19, validators=[django.core.validators.MinValueValidator(0)], verbose_name='Quantity')),
+                ('date', models.DateField(auto_now_add=True, help_text='Date stocktake was performed', verbose_name='Date')),
+                ('part', models.ForeignKey(help_text='Part for stocktake', on_delete=django.db.models.deletion.CASCADE, related_name='stocktakes', to='part.part', verbose_name='Part')),
+                ('user', models.ForeignKey(blank=True, help_text='User who performed this stocktake', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='part_stocktakes', to=settings.AUTH_USER_MODEL, verbose_name='User')),
+            ],
+        ),
+    ]

InvenTree/part/models.py

@@ -2878,6 +2878,45 @@ class PartPricing(models.Model):
     )
 
 
+class PartStocktake(models.Model):
+    """Model representing a 'stocktake' entry for a particular Part.
+
+    A 'stocktake' is a representative count of available stock:
+    - Performed on a given date
+    - Records quantity of part in stock (across multiple stock items)
+    - Records user information
+    """
+
+    part = models.ForeignKey(
+        Part,
+        on_delete=models.CASCADE,
+        related_name='stocktakes',
+        verbose_name=_('Part'),
+        help_text=_('Part for stocktake'),
+    )
+
+    quantity = models.DecimalField(
+        max_digits=19, decimal_places=5,
+        validators=[MinValueValidator(0)],
+        verbose_name=_('Quantity'),
+        help_text=_('Total available stock at time of stocktake'),
+    )
+
+    date = models.DateField(
+        verbose_name=_('Date'),
+        help_text=_('Date stocktake was performed'),
+        auto_now_add=True
+    )
+
+    user = models.ForeignKey(
+        User, blank=True, null=True,
+        on_delete=models.SET_NULL,
+        related_name='part_stocktakes',
+        verbose_name=_('User'),
+        help_text=_('User who performed this stocktake'),
+    )
+
+
 class PartAttachment(InvenTreeAttachment):
     """Model for storing file attachments against a Part object."""