From a5639c380f79b60585a325823db997f2dd9a7b18 Mon Sep 17 00:00:00 2001
From: Oliver Walters <oliver.henry.walters@gmail.com>
Date: Tue, 20 Oct 2020 00:13:43 +1100
Subject: [PATCH] Add regex validator to build order reference field

---
 InvenTree/InvenTree/validators.py             | 42 +++++++++++++++++++
 .../migrations/0019_auto_20201019_1302.py     | 23 ++++++++++
 InvenTree/build/models.py                     |  5 +++
 3 files changed, 70 insertions(+)
 create mode 100644 InvenTree/build/migrations/0019_auto_20201019_1302.py

diff --git a/InvenTree/InvenTree/validators.py b/InvenTree/InvenTree/validators.py
index 548bce12ab..be96affbbd 100644
--- a/InvenTree/InvenTree/validators.py
+++ b/InvenTree/InvenTree/validators.py
@@ -52,6 +52,48 @@ def validate_part_ipn(value):
             raise ValidationError(_('IPN must match regex pattern') + " '{pat}'".format(pat=pattern))
 
 
+def validate_build_order_reference(value):
+    """
+    Validate the 'reference' field of a BuildOrder
+    """
+
+    pattern = common.models.InvenTreeSetting.get_setting('buildorder_reference_regex')
+
+    if pattern:
+        match = re.search(pattern, value)
+
+        if match is None:
+            raise ValidationError(_('Reference must match pattern') + f" '{pattern}'")
+
+
+def validate_purchase_order_reference(value):
+    """
+    Validate the 'reference' field of a PurchaseOrder
+    """
+
+    pattern = common.models.InvenTreeSetting.get_setting('purchaseorder_reference_regex')
+
+    if pattern:
+        match = re.search(pattern, value)
+
+        if match is None:
+            raise ValidationError(_('Reference must match pattern') + f" '{pattern}'")
+
+
+def validate_sales_order_reference(value):
+    """
+    Validate the 'reference' field of a SalesOrder
+    """
+
+    pattern = common.models.InvenTreeSetting.get_setting('salesorder_reference_regex')
+
+    if pattern:
+        match = re.search(pattern, value)
+
+        if match is None:
+            raise ValidationError(_('Reference must match pattern') + f" '{pattern}'")
+
+
 def validate_tree_name(value):
     """ Prevent illegal characters in tree item names """
 
diff --git a/InvenTree/build/migrations/0019_auto_20201019_1302.py b/InvenTree/build/migrations/0019_auto_20201019_1302.py
new file mode 100644
index 0000000000..c767d3a3d9
--- /dev/null
+++ b/InvenTree/build/migrations/0019_auto_20201019_1302.py
@@ -0,0 +1,23 @@
+# Generated by Django 3.0.7 on 2020-10-19 13:02
+
+import InvenTree.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('build', '0018_build_reference'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='build',
+            options={'verbose_name': 'Build Order', 'verbose_name_plural': 'Build Orders'},
+        ),
+        migrations.AlterField(
+            model_name='build',
+            name='reference',
+            field=models.CharField(help_text='Build Order Reference', max_length=64, unique=True, validators=[InvenTree.validators.validate_build_order_reference], verbose_name='Reference'),
+        ),
+    ]
diff --git a/InvenTree/build/models.py b/InvenTree/build/models.py
index 40666d5fce..62f6cdea09 100644
--- a/InvenTree/build/models.py
+++ b/InvenTree/build/models.py
@@ -23,6 +23,8 @@ from mptt.models import MPTTModel, TreeForeignKey
 
 from InvenTree.status_codes import BuildStatus
 from InvenTree.helpers import increment
+from InvenTree.validators import validate_build_order_reference
+
 import InvenTree.fields
 
 from stock import models as StockModels
@@ -81,6 +83,9 @@ class Build(MPTTModel):
         blank=False,
         help_text=_('Build Order Reference'),
         verbose_name=_('Reference'),
+        validators=[
+            validate_build_order_reference
+        ]
     )
 
     title = models.CharField(