Merge pull request #2876 from SchrodingersGat/default-batch-code

Default batch code

InvenTree/common/models.py

@@ -932,6 +932,12 @@ class InvenTreeSetting(BaseInvenTreeSetting):
             'validator': bool,
         },
 
+        'STOCK_BATCH_CODE_TEMPLATE': {
+            'name': _('Batch Code Template'),
+            'description': _('Template for generating default batch codes for stock items'),
+            'default': '',
+        },
+
         'STOCK_ENABLE_EXPIRY': {
             'name': _('Stock Expiry'),
             'description': _('Enable stock expiry functionality'),

InvenTree/stock/migrations/0074_alter_stockitem_batch.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.12 on 2022-04-26 10:19
+
+from django.db import migrations, models
+import stock.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0073_alter_stockitem_belongs_to'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='batch',
+            field=models.CharField(blank=True, default=stock.models.generate_batch_code, help_text='Batch code for this stock item', max_length=100, null=True, verbose_name='Batch Code'),
+        ),
+    ]

InvenTree/stock/models.py

@@ -8,6 +8,8 @@ from __future__ import unicode_literals
 
 import os
 
+from jinja2 import Template
+
 from django.utils.translation import gettext_lazy as _
 from django.core.exceptions import ValidationError, FieldError
 from django.urls import reverse
@@ -213,6 +215,32 @@ class StockItemManager(TreeManager):
         )
 
 
+def generate_batch_code():
+    """
+    Generate a default 'batch code' for a new StockItem.
+
+    This uses the value of the 'STOCK_BATCH_CODE_TEMPLATE' setting (if configured),
+    which can be passed through a simple template.
+    """
+
+    batch_template = common.models.InvenTreeSetting.get_setting('STOCK_BATCH_CODE_TEMPLATE', '')
+
+    now = datetime.now()
+
+    # Pass context data through to the template randering.
+    # The folowing context variables are availble for custom batch code generation
+    context = {
+        'date': now,
+        'year': now.year,
+        'month': now.month,
+        'day': now.day,
+        'hour': now.minute,
+        'minute': now.minute,
+    }
+
+    return Template(batch_template).render(context)
+
+
 class StockItem(MPTTModel):
     """
     A StockItem object represents a quantity of physical instances of a part.
@@ -644,7 +672,8 @@ class StockItem(MPTTModel):
     batch = models.CharField(
         verbose_name=_('Batch Code'),
         max_length=100, blank=True, null=True,
-        help_text=_('Batch code for this stock item')
+        help_text=_('Batch code for this stock item'),
+        default=generate_batch_code,
     )
 
     quantity = models.DecimalField(

InvenTree/templates/InvenTree/settings/stock.html

@@ -11,6 +11,7 @@
 
 <table class='table table-striped table-condensed'>
     <tbody>
+        {% include "InvenTree/settings/setting.html" with key="STOCK_BATCH_CODE_TEMPLATE" icon="fa-layer-group" %}
         {% include "InvenTree/settings/setting.html" with key="STOCK_ENABLE_EXPIRY" icon="fa-stopwatch" %}
         {% include "InvenTree/settings/setting.html" with key="STOCK_STALE_DAYS" icon="fa-calendar" %}
         {% include "InvenTree/settings/setting.html" with key="STOCK_ALLOW_EXPIRED_SALE" icon="fa-truck" %}