Added PART_NAME_FORMAT to Inventree settings and exposed the same in settings window with a validator

InvenTree/common/models.py

@@ -9,6 +9,7 @@ from __future__ import unicode_literals
 import os
 import decimal
 import math
+import re
 
 from django.db import models, transaction
 from django.contrib.auth.models import User
@@ -487,6 +488,26 @@ class InvenTreeSetting(BaseInvenTreeSetting):
     even if that key does not exist.
     """
 
+    def validate_part_name_format(self):
+        """
+        Validate part name format.
+        Make sure that each template container has a field of Part Model
+        """
+
+        jinja_template_regex = re.compile('{{.*?}}')
+        field_name_regex = re.compile('(?<=part\\.)[A-z]*')
+        for jinja_template in jinja_template_regex.findall(str(self)):
+            # make sure at least one and only one field is present inside the parser
+            field_name = field_name_regex.findall(jinja_template)
+            if len(field_name) < 1:
+                raise ValidationError({
+                    'value': 'At least one field must be present inside a jinja template container i.e {{}}'
+                })
+
+            # TODO: Make sure that the field_name exists in Part model
+
+        return True
+
     """
     Dict of all global settings values:
 
@@ -702,6 +723,14 @@ class InvenTreeSetting(BaseInvenTreeSetting):
             'validator': bool
         },
 
+        'PART_NAME_FORMAT': {
+            'name': _('Part Name Display Format'),
+            'description': _('Format to display the part name'),
+            'default': "{{ part.IPN if part.IPN }} {{ '|' if part.IPN }} {{ part.name }} {{ '|' if part.revision }}"
+                       " {{ part.revision }}",
+            'validator': validate_part_name_format
+        },
+
         'REPORT_DEBUG_MODE': {
             'name': _('Debug Mode'),
             'description': _('Generate reports in debug mode (HTML output)'),