Model introspection

- Find the class registered to the model (or log an error)
- Pass the api_url through to the frontend

InvenTree/common/models.py

@@ -17,15 +17,16 @@ import base64
 from secrets import compare_digest
 from datetime import datetime, timedelta
 
+from django.apps import apps
 from django.db import models, transaction
+from django.db.utils import IntegrityError, OperationalError
+from django.conf import settings
 from django.contrib.auth.models import User, Group
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
-from django.db.utils import IntegrityError, OperationalError
-from django.conf import settings
+from django.contrib.humanize.templatetags.humanize import naturaltime
 from django.urls import reverse
 from django.utils.timezone import now
-from django.contrib.humanize.templatetags.humanize import naturaltime
 
 from djmoney.settings import CURRENCY_CHOICES
 from djmoney.contrib.exchange.models import convert_money
@@ -587,6 +588,58 @@ class BaseInvenTreeSetting(models.Model):
 
         return setting.get('model', None)
 
+    def model_class(self):
+        """
+        Return the model class associated with this setting, if (and only if):
+
+        - It has a defined 'model' parameter
+        - The 'model' parameter is of the form app.model
+        - The 'model' parameter has matches a known app model
+        """
+
+        model_name = self.model_name()
+
+        if not model_name:
+            return None
+        
+        try:
+            (app, mdl) = model_name.strip().split('.')
+        except ValueError:
+            logger.error(f"Invalid 'model' parameter for setting {self.key} : '{model_name}'")
+            return None
+
+        app_models = apps.all_models.get(app, None)
+
+        if app_models is None:
+            logger.error(f"Error retrieving model class '{model_name}' for setting '{self.key}' - no app named '{app}'")
+            return None
+
+        model = app_models.get(mdl, None)
+
+        if model is None:
+            logger.error(f"Error retrieving model class '{model_name}' for setting '{self.key}' - no model named '{mdl}'")
+            return None
+
+        # Looks like we have found a model!
+        return model
+
+    def api_url(self):
+        """
+        Return the API url associated with the linked model,
+        if provided, and valid!
+        """
+
+        model_class = self.model_class()
+
+        if model_class:
+            # If a valid class has been found, see if it has registered an API URL
+            try:
+                return model_class.get_api_url()
+            except:
+                pass
+        
+        return None
+
     def is_bool(self):
         """
         Check if this setting is required to be a boolean value
@@ -617,7 +670,7 @@ class BaseInvenTreeSetting(models.Model):
             return 'integer'
 
         elif self.is_model():
-            return 'model'
+            return 'related field'
 
         else:
             return 'string'

InvenTree/common/serializers.py

@@ -30,6 +30,8 @@ class SettingsSerializer(InvenTreeModelSerializer):
 
     model_name = serializers.CharField(read_only=True)
 
+    api_url = serializers.CharField(read_only=True)
+
     def get_choices(self, obj):
         """
         Returns the choices available for a given item
@@ -78,6 +80,7 @@ class GlobalSettingsSerializer(SettingsSerializer):
             'type',
             'choices',
             'model_name',
+            'api_url',
         ]
 
 
@@ -100,6 +103,7 @@ class UserSettingsSerializer(SettingsSerializer):
             'type',
             'choices',
             'model_name',
+            'api_url',
         ]
 
 
@@ -129,6 +133,7 @@ class GenericReferencedSettingSerializer(SettingsSerializer):
                 'type',
                 'choices',
                 'model_name',
+                'api_url',
             ]
 
         # set Meta class

InvenTree/plugin/models.py

@@ -137,7 +137,7 @@ class PluginSetting(common.models.BaseInvenTreeSetting):
 
         if 'settings' not in kwargs:
 
-            plugin = kwargs.pop('plugin')
+            plugin = kwargs.pop('plugin', None)
 
             if plugin:
 

InvenTree/plugin/samples/integration/sample.py

@@ -68,7 +68,12 @@ class SampleIntegrationPlugin(AppMixin, SettingsMixin, UrlsMixin, NavigationMixi
         'SELECT_COMPANY': {
             'name': 'Company',
             'description': 'Select a company object from the database',
-            'model': 'company.Company',
+            'model': 'company.company',
+        },
+        'SELECT_PART': {
+            'name': 'Part',
+            'description': 'Select a part object from the database',
+            'model': 'part.part',
         },
     }
 

InvenTree/templates/InvenTree/settings/setting.html

@@ -22,9 +22,6 @@
         {{ setting.description }}
     </td>
     <td>
-        {% if setting.model_name %}
-        <b>Model name: {{ setting.model_name }}</b>
-        {% endif %}
         {% if setting.is_bool %}
         <div class='form-check form-switch'>
             <input class='form-check-input boolean-setting' fieldname='{{ setting.key.upper }}' pk='{{ setting.pk }}' setting='{{ setting.key.upper }}' id='setting-value-{{ setting.key.upper }}' type='checkbox' {% if setting.as_bool %}checked=''{% endif %} {% if plugin %}plugin='{{ plugin.slug }}'{% endif %}{% if user_setting %}user='{{request.user.id}}'{% endif %}{% if notification_setting %}notification='{{request.user.id}}'{% endif %}>

InvenTree/templates/js/dynamic/settings.js

@@ -71,9 +71,24 @@ function editSetting(key, options={}) {
                     help_text: response.description,
                     type: response.type,
                     choices: response.choices,
+                    value: response.value,
                 }
             };
 
+            // Foreign key lookup available!
+            if (response.type == 'related field') {
+                
+                if (response.model_name && response.api_url) {
+                    fields.value.type = 'related field';
+                    fields.value.model = response.model_name.split('.').at(-1);
+                    fields.value.api_url = response.api_url;
+                } else {
+                    // Unknown / unsupported model type, default to 'text' field
+                    fields.value.type = 'text';
+                    console.warn(`Unsupported model type: '${response.model_name}' for setting '${response.key}'`);
+                }
+            }
+
             constructChangeForm(fields, {
                 url: url,
                 method: 'PATCH',