Closes #6711: Add longtext custom field type with Markdown support

docs/models/extras/customfield.md

@@ -11,6 +11,7 @@ Within the database, custom fields are stored as JSON data directly alongside ea
 Custom fields may be created by navigating to Customization > Custom Fields. NetBox supports six types of custom field:
 
 * Text: Free-form text (up to 255 characters)
+* Long text: Free-form of any length; supports Markdown rendering
 * Integer: A whole number (positive or negative)
 * Boolean: True or false
 * Date: A date in ISO 8601 format (YYYY-MM-DD)

docs/release-notes/version-3.1.md

@@ -6,6 +6,7 @@
 ### Enhancements
 
 * [#1337](https://github.com/netbox-community/netbox/issues/1337) - Add WWN field to interfaces
+* [#6711](https://github.com/netbox-community/netbox/issues/6711) - Add `longtext` custom field type with Markdown support
 * [#6874](https://github.com/netbox-community/netbox/issues/6874) - Add tenant assignment for locations
 
 ### Other Changes

netbox/extras/choices.py

@@ -8,6 +8,7 @@ from utilities.choices import ChoiceSet
 class CustomFieldTypeChoices(ChoiceSet):
 
     TYPE_TEXT = 'text'
+    TYPE_LONGTEXT = 'longtext'
     TYPE_INTEGER = 'integer'
     TYPE_BOOLEAN = 'boolean'
     TYPE_DATE = 'date'
@@ -17,6 +18,7 @@ class CustomFieldTypeChoices(ChoiceSet):
 
     CHOICES = (
         (TYPE_TEXT, 'Text'),
+        (TYPE_LONGTEXT, 'Text (long)'),
         (TYPE_INTEGER, 'Integer'),
         (TYPE_BOOLEAN, 'Boolean (true/false)'),
         (TYPE_DATE, 'Date'),

netbox/extras/models/customfields.py

@@ -166,7 +166,10 @@ class CustomField(ChangeLoggedModel):
         # Validate the field's default value (if any)
         if self.default is not None:
             try:
-                default_value = str(self.default) if self.type == CustomFieldTypeChoices.TYPE_TEXT else self.default
+                if self.type in (CustomFieldTypeChoices.TYPE_TEXT, CustomFieldTypeChoices.TYPE_LONGTEXT):
+                    default_value = str(self.default)
+                else:
+                    default_value = self.default
                 self.validate(default_value)
             except ValidationError as err:
                 raise ValidationError({
@@ -184,7 +187,11 @@ class CustomField(ChangeLoggedModel):
             })
 
         # Regex validation can be set only for text fields
-        regex_types = (CustomFieldTypeChoices.TYPE_TEXT, CustomFieldTypeChoices.TYPE_URL)
+        regex_types = (
+            CustomFieldTypeChoices.TYPE_TEXT,
+            CustomFieldTypeChoices.TYPE_LONGTEXT,
+            CustomFieldTypeChoices.TYPE_URL,
+        )
         if self.validation_regex and self.type not in regex_types:
             raise ValidationError({
                 'validation_regex': "Regular expression validation is supported only for text and URL fields"
@@ -275,7 +282,13 @@ class CustomField(ChangeLoggedModel):
 
         # Text
         else:
-            field = forms.CharField(max_length=255, required=required, initial=initial)
+            if self.type == CustomFieldTypeChoices.TYPE_LONGTEXT:
+                max_length = None
+                widget = forms.Textarea
+            else:
+                max_length = 255
+                widget = None
+            field = forms.CharField(max_length=max_length, required=required, initial=initial, widget=widget)
             if self.validation_regex:
                 field.validators = [
                     RegexValidator(
@@ -298,7 +311,7 @@ class CustomField(ChangeLoggedModel):
         if value not in [None, '']:
 
             # Validate text field
-            if self.type == CustomFieldTypeChoices.TYPE_TEXT:
+            if self.type in (CustomFieldTypeChoices.TYPE_TEXT, CustomFieldTypeChoices.TYPE_LONGTEXT):
                 if type(value) is not str:
                     raise ValidationError(f"Value must be a string.")
                 if self.validation_regex and not re.match(self.validation_regex, value):

netbox/extras/tests/test_customfields.py

@@ -24,13 +24,46 @@ class CustomFieldTest(TestCase):
 
     def test_simple_fields(self):
         DATA = (
-            {'field_type': CustomFieldTypeChoices.TYPE_TEXT, 'field_value': 'Foobar!', 'empty_value': ''},
-            {'field_type': CustomFieldTypeChoices.TYPE_INTEGER, 'field_value': 0, 'empty_value': None},
-            {'field_type': CustomFieldTypeChoices.TYPE_INTEGER, 'field_value': 42, 'empty_value': None},
-            {'field_type': CustomFieldTypeChoices.TYPE_BOOLEAN, 'field_value': True, 'empty_value': None},
-            {'field_type': CustomFieldTypeChoices.TYPE_BOOLEAN, 'field_value': False, 'empty_value': None},
-            {'field_type': CustomFieldTypeChoices.TYPE_DATE, 'field_value': '2016-06-23', 'empty_value': None},
-            {'field_type': CustomFieldTypeChoices.TYPE_URL, 'field_value': 'http://example.com/', 'empty_value': ''},
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_TEXT,
+                'field_value': 'Foobar!',
+                'empty_value': '',
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_LONGTEXT,
+                'field_value': 'Text with **Markdown**',
+                'empty_value': '',
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_INTEGER,
+                'field_value': 0,
+                'empty_value': None,
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_INTEGER,
+                'field_value': 42,
+                'empty_value': None,
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_BOOLEAN,
+                'field_value': True,
+                'empty_value': None,
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_BOOLEAN,
+                'field_value': False,
+                'empty_value': None,
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_DATE,
+                'field_value': '2016-06-23',
+                'empty_value': None,
+            },
+            {
+                'field_type': CustomFieldTypeChoices.TYPE_URL,
+                'field_value': 'http://example.com/',
+                'empty_value': '',
+            },
         )
 
         obj_type = ContentType.objects.get_for_model(Site)
@@ -149,6 +182,11 @@ class CustomFieldAPITest(APITestCase):
         cls.cf_text.save()
         cls.cf_text.content_types.set([content_type])
 
+        # Long text custom field
+        cls.cf_longtext = CustomField(type=CustomFieldTypeChoices.TYPE_LONGTEXT, name='longtext_field', default='ABC')
+        cls.cf_longtext.save()
+        cls.cf_longtext.content_types.set([content_type])
+
         # Integer custom field
         cls.cf_integer = CustomField(type=CustomFieldTypeChoices.TYPE_INTEGER, name='number_field', default=123)
         cls.cf_integer.save()
@@ -185,6 +223,7 @@ class CustomFieldAPITest(APITestCase):
         # Assign custom field values for site 2
         cls.sites[1].custom_field_data = {
             cls.cf_text.name: 'bar',
+            cls.cf_longtext.name: 'DEF',
             cls.cf_integer.name: 456,
             cls.cf_boolean.name: True,
             cls.cf_date.name: '2020-01-02',
@@ -204,6 +243,7 @@ class CustomFieldAPITest(APITestCase):
         self.assertEqual(response.data['name'], self.sites[0].name)
         self.assertEqual(response.data['custom_fields'], {
             'text_field': None,
+            'longtext_field': None,
             'number_field': None,
             'boolean_field': None,
             'date_field': None,
@@ -222,6 +262,7 @@ class CustomFieldAPITest(APITestCase):
         response = self.client.get(url, **self.header)
         self.assertEqual(response.data['name'], self.sites[1].name)
         self.assertEqual(response.data['custom_fields']['text_field'], site2_cfvs['text_field'])
+        self.assertEqual(response.data['custom_fields']['longtext_field'], site2_cfvs['longtext_field'])
         self.assertEqual(response.data['custom_fields']['number_field'], site2_cfvs['number_field'])
         self.assertEqual(response.data['custom_fields']['boolean_field'], site2_cfvs['boolean_field'])
         self.assertEqual(response.data['custom_fields']['date_field'], site2_cfvs['date_field'])
@@ -245,6 +286,7 @@ class CustomFieldAPITest(APITestCase):
         # Validate response data
         response_cf = response.data['custom_fields']
         self.assertEqual(response_cf['text_field'], self.cf_text.default)
+        self.assertEqual(response_cf['longtext_field'], self.cf_longtext.default)
         self.assertEqual(response_cf['number_field'], self.cf_integer.default)
         self.assertEqual(response_cf['boolean_field'], self.cf_boolean.default)
         self.assertEqual(response_cf['date_field'], self.cf_date.default)
@@ -254,6 +296,7 @@ class CustomFieldAPITest(APITestCase):
         # Validate database data
         site = Site.objects.get(pk=response.data['id'])
         self.assertEqual(site.custom_field_data['text_field'], self.cf_text.default)
+        self.assertEqual(site.custom_field_data['longtext_field'], self.cf_longtext.default)
         self.assertEqual(site.custom_field_data['number_field'], self.cf_integer.default)
         self.assertEqual(site.custom_field_data['boolean_field'], self.cf_boolean.default)
         self.assertEqual(str(site.custom_field_data['date_field']), self.cf_date.default)
@@ -269,6 +312,7 @@ class CustomFieldAPITest(APITestCase):
             'slug': 'site-3',
             'custom_fields': {
                 'text_field': 'bar',
+                'longtext_field': 'blah blah blah',
                 'number_field': 456,
                 'boolean_field': True,
                 'date_field': '2020-01-02',
@@ -286,6 +330,7 @@ class CustomFieldAPITest(APITestCase):
         response_cf = response.data['custom_fields']
         data_cf = data['custom_fields']
         self.assertEqual(response_cf['text_field'], data_cf['text_field'])
+        self.assertEqual(response_cf['longtext_field'], data_cf['longtext_field'])
         self.assertEqual(response_cf['number_field'], data_cf['number_field'])
         self.assertEqual(response_cf['boolean_field'], data_cf['boolean_field'])
         self.assertEqual(response_cf['date_field'], data_cf['date_field'])
@@ -295,6 +340,7 @@ class CustomFieldAPITest(APITestCase):
         # Validate database data
         site = Site.objects.get(pk=response.data['id'])
         self.assertEqual(site.custom_field_data['text_field'], data_cf['text_field'])
+        self.assertEqual(site.custom_field_data['longtext_field'], data_cf['longtext_field'])
         self.assertEqual(site.custom_field_data['number_field'], data_cf['number_field'])
         self.assertEqual(site.custom_field_data['boolean_field'], data_cf['boolean_field'])
         self.assertEqual(str(site.custom_field_data['date_field']), data_cf['date_field'])
@@ -332,6 +378,7 @@ class CustomFieldAPITest(APITestCase):
             # Validate response data
             response_cf = response.data[i]['custom_fields']
             self.assertEqual(response_cf['text_field'], self.cf_text.default)
+            self.assertEqual(response_cf['longtext_field'], self.cf_longtext.default)
             self.assertEqual(response_cf['number_field'], self.cf_integer.default)
             self.assertEqual(response_cf['boolean_field'], self.cf_boolean.default)
             self.assertEqual(response_cf['date_field'], self.cf_date.default)
@@ -341,6 +388,7 @@ class CustomFieldAPITest(APITestCase):
             # Validate database data
             site = Site.objects.get(pk=response.data[i]['id'])
             self.assertEqual(site.custom_field_data['text_field'], self.cf_text.default)
+            self.assertEqual(site.custom_field_data['longtext_field'], self.cf_longtext.default)
             self.assertEqual(site.custom_field_data['number_field'], self.cf_integer.default)
             self.assertEqual(site.custom_field_data['boolean_field'], self.cf_boolean.default)
             self.assertEqual(str(site.custom_field_data['date_field']), self.cf_date.default)
@@ -353,6 +401,7 @@ class CustomFieldAPITest(APITestCase):
         """
         custom_field_data = {
             'text_field': 'bar',
+            'longtext_field': 'abcdefghij',
             'number_field': 456,
             'boolean_field': True,
             'date_field': '2020-01-02',
@@ -388,6 +437,7 @@ class CustomFieldAPITest(APITestCase):
             # Validate response data
             response_cf = response.data[i]['custom_fields']
             self.assertEqual(response_cf['text_field'], custom_field_data['text_field'])
+            self.assertEqual(response_cf['longtext_field'], custom_field_data['longtext_field'])
             self.assertEqual(response_cf['number_field'], custom_field_data['number_field'])
             self.assertEqual(response_cf['boolean_field'], custom_field_data['boolean_field'])
             self.assertEqual(response_cf['date_field'], custom_field_data['date_field'])
@@ -397,6 +447,7 @@ class CustomFieldAPITest(APITestCase):
             # Validate database data
             site = Site.objects.get(pk=response.data[i]['id'])
             self.assertEqual(site.custom_field_data['text_field'], custom_field_data['text_field'])
+            self.assertEqual(site.custom_field_data['longtext_field'], custom_field_data['longtext_field'])
             self.assertEqual(site.custom_field_data['number_field'], custom_field_data['number_field'])
             self.assertEqual(site.custom_field_data['boolean_field'], custom_field_data['boolean_field'])
             self.assertEqual(str(site.custom_field_data['date_field']), custom_field_data['date_field'])
@@ -426,6 +477,7 @@ class CustomFieldAPITest(APITestCase):
         response_cf = response.data['custom_fields']
         self.assertEqual(response_cf['text_field'], data['custom_fields']['text_field'])
         self.assertEqual(response_cf['number_field'], data['custom_fields']['number_field'])
+        self.assertEqual(response_cf['longtext_field'], original_cfvs['longtext_field'])
         self.assertEqual(response_cf['boolean_field'], original_cfvs['boolean_field'])
         self.assertEqual(response_cf['date_field'], original_cfvs['date_field'])
         self.assertEqual(response_cf['url_field'], original_cfvs['url_field'])
@@ -435,6 +487,7 @@ class CustomFieldAPITest(APITestCase):
         site.refresh_from_db()
         self.assertEqual(site.custom_field_data['text_field'], data['custom_fields']['text_field'])
         self.assertEqual(site.custom_field_data['number_field'], data['custom_fields']['number_field'])
+        self.assertEqual(site.custom_field_data['longtext_field'], original_cfvs['longtext_field'])
         self.assertEqual(site.custom_field_data['boolean_field'], original_cfvs['boolean_field'])
         self.assertEqual(site.custom_field_data['date_field'], original_cfvs['date_field'])
         self.assertEqual(site.custom_field_data['url_field'], original_cfvs['url_field'])
@@ -491,11 +544,14 @@ class CustomFieldImportTest(TestCase):
 
         custom_fields = (
             CustomField(name='text', type=CustomFieldTypeChoices.TYPE_TEXT),
+            CustomField(name='longtext', type=CustomFieldTypeChoices.TYPE_LONGTEXT),
             CustomField(name='integer', type=CustomFieldTypeChoices.TYPE_INTEGER),
             CustomField(name='boolean', type=CustomFieldTypeChoices.TYPE_BOOLEAN),
             CustomField(name='date', type=CustomFieldTypeChoices.TYPE_DATE),
             CustomField(name='url', type=CustomFieldTypeChoices.TYPE_URL),
-            CustomField(name='select', type=CustomFieldTypeChoices.TYPE_SELECT, choices=['Choice A', 'Choice B', 'Choice C']),
+            CustomField(name='select', type=CustomFieldTypeChoices.TYPE_SELECT, choices=[
+                'Choice A', 'Choice B', 'Choice C',
+            ]),
         )
         for cf in custom_fields:
             cf.save()
@@ -506,10 +562,10 @@ class CustomFieldImportTest(TestCase):
         Import a Site in CSV format, including a value for each CustomField.
         """
         data = (
-            ('name', 'slug', 'status', 'cf_text', 'cf_integer', 'cf_boolean', 'cf_date', 'cf_url', 'cf_select'),
-            ('Site 1', 'site-1', 'active', 'ABC', '123', 'True', '2020-01-01', 'http://example.com/1', 'Choice A'),
-            ('Site 2', 'site-2', 'active', 'DEF', '456', 'False', '2020-01-02', 'http://example.com/2', 'Choice B'),
-            ('Site 3', 'site-3', 'active', '', '', '', '', '', ''),
+            ('name', 'slug', 'status', 'cf_text', 'cf_longtext', 'cf_integer', 'cf_boolean', 'cf_date', 'cf_url', 'cf_select'),
+            ('Site 1', 'site-1', 'active', 'ABC', 'Foo', '123', 'True', '2020-01-01', 'http://example.com/1', 'Choice A'),
+            ('Site 2', 'site-2', 'active', 'DEF', 'Bar', '456', 'False', '2020-01-02', 'http://example.com/2', 'Choice B'),
+            ('Site 3', 'site-3', 'active', '', '', '', '', '', '', ''),
         )
         csv_data = '\n'.join(','.join(row) for row in data)
 
@@ -518,8 +574,9 @@ class CustomFieldImportTest(TestCase):
 
         # Validate data for site 1
         site1 = Site.objects.get(name='Site 1')
-        self.assertEqual(len(site1.custom_field_data), 6)
+        self.assertEqual(len(site1.custom_field_data), 7)
         self.assertEqual(site1.custom_field_data['text'], 'ABC')
+        self.assertEqual(site1.custom_field_data['longtext'], 'Foo')
         self.assertEqual(site1.custom_field_data['integer'], 123)
         self.assertEqual(site1.custom_field_data['boolean'], True)
         self.assertEqual(site1.custom_field_data['date'], '2020-01-01')
@@ -528,8 +585,9 @@ class CustomFieldImportTest(TestCase):
 
         # Validate data for site 2
         site2 = Site.objects.get(name='Site 2')
-        self.assertEqual(len(site2.custom_field_data), 6)
+        self.assertEqual(len(site2.custom_field_data), 7)
         self.assertEqual(site2.custom_field_data['text'], 'DEF')
+        self.assertEqual(site2.custom_field_data['longtext'], 'Bar')
         self.assertEqual(site2.custom_field_data['integer'], 456)
         self.assertEqual(site2.custom_field_data['boolean'], False)
         self.assertEqual(site2.custom_field_data['date'], '2020-01-02')

netbox/extras/tests/test_forms.py

@@ -17,6 +17,9 @@ class CustomFieldModelFormTest(TestCase):
         cf_text = CustomField.objects.create(name='text', type=CustomFieldTypeChoices.TYPE_TEXT)
         cf_text.content_types.set([obj_type])
 
+        cf_longtext = CustomField.objects.create(name='longtext', type=CustomFieldTypeChoices.TYPE_LONGTEXT)
+        cf_longtext.content_types.set([obj_type])
+
         cf_integer = CustomField.objects.create(name='integer', type=CustomFieldTypeChoices.TYPE_INTEGER)
         cf_integer.content_types.set([obj_type])
 

netbox/templates/inc/custom_fields_panel.html

@@ -1,3 +1,5 @@
+{% load helpers %}
+
 {% with custom_fields=object.get_custom_fields %}
     {% if custom_fields %}
         <div class="card">
@@ -10,7 +12,9 @@
                         <tr>
                             <td><span title="{{ field.description }}">{{ field }}</span></td>
                             <td>
-                                {% if field.type == 'boolean' and value == True %}
+                                {% if field.type == 'longtext' and value %}
+                                    {{ value|render_markdown }}
+                                {% elif field.type == 'boolean' and value == True %}
                                     <i class="mdi mdi-check-bold text-success" title="True"></i>
                                 {% elif field.type == 'boolean' and value == False %}
                                     <i class="mdi mdi-close-thick text-danger" title="False"></i>