Merge pull request #1700 from SchrodingersGat/api-default-values

Unit testing for default values

InvenTree/InvenTree/api_tester.py

@@ -18,6 +18,7 @@ class InvenTreeAPITestCase(APITestCase):
     email = 'test@testing.com'
 
     superuser = False
+    is_staff = True
     auto_login = True
 
     # Set list of roles automatically associated with the user
@@ -40,7 +41,11 @@ class InvenTreeAPITestCase(APITestCase):
 
         if self.superuser:
             self.user.is_superuser = True
-            self.user.save()
+
+        if self.is_staff:
+            self.user.is_staff = True
+
+        self.user.save()
         
         for role in self.roles:
             self.assignRole(role)

InvenTree/InvenTree/serializers.py

@@ -2,17 +2,19 @@
 Serializers used in various InvenTree apps
 """
 
-
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
 import os
 
+from collections import OrderedDict
+
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError as DjangoValidationError
 
 from rest_framework import serializers
+from rest_framework.utils import model_meta
 from rest_framework.fields import empty
 from rest_framework.exceptions import ValidationError
 
@@ -42,6 +44,72 @@ class InvenTreeModelSerializer(serializers.ModelSerializer):
     but also ensures that the underlying model class data are checked on validation.
     """
 
+    def __init__(self, instance=None, data=empty, **kwargs):
+
+        self.instance = instance
+
+        # If instance is None, we are creating a new instance
+        if instance is None:
+            
+            if data is empty:
+                data = OrderedDict()
+            else:
+                # Required to side-step immutability of a QueryDict
+                data = data.copy()
+
+            # Add missing fields which have default values
+            ModelClass = self.Meta.model
+
+            fields = model_meta.get_field_info(ModelClass)
+
+            for field_name, field in fields.fields.items():
+
+                if field.has_default() and field_name not in data:
+
+                    value = field.default
+
+                    # Account for callable functions
+                    if callable(value):
+                        try:
+                            value = value()
+                        except:
+                            continue
+
+                    data[field_name] = value
+
+        super().__init__(instance, data, **kwargs)
+
+    def get_initial(self):
+        """
+        Construct initial data for the serializer.
+        Use the 'default' values specified by the django model definition
+        """
+
+        initials = super().get_initial()
+
+        # Are we creating a new instance?
+        if self.instance is None:
+            ModelClass = self.Meta.model
+
+            fields = model_meta.get_field_info(ModelClass)
+
+            for field_name, field in fields.fields.items():
+
+                if field.has_default() and field_name not in initials:
+
+                    value = field.default
+
+                    # Account for callable functions
+                    if callable(value):
+                        try:
+                            value = value()
+                        except:
+                            continue
+
+                    initials[field_name] = value
+
+        return initials
+
     def run_validation(self, data=empty):
         """ Perform serializer validation.
         In addition to running validators on the serializer fields,

InvenTree/part/test_api.py

@@ -13,6 +13,7 @@ from InvenTree.status_codes import StockStatus
 from part.models import Part, PartCategory
 from stock.models import StockItem
 from company.models import Company
+from common.models import InvenTreeSetting
 
 
 class PartAPITest(InvenTreeAPITestCase):
@@ -311,6 +312,59 @@ class PartAPITest(InvenTreeAPITestCase):
 
             self.assertEqual(len(data['results']), n)
 
+    def test_default_values(self):
+        """
+        Tests for 'default' values:
+
+        Ensure that unspecified fields revert to "default" values
+        (as specified in the model field definition)
+        """
+
+        url = reverse('api-part-list')
+
+        response = self.client.post(url, {
+            'name': 'all defaults',
+            'description': 'my test part',
+            'category': 1,
+        })
+
+        data = response.data
+
+        # Check that the un-specified fields have used correct default values
+        self.assertTrue(data['active'])
+        self.assertFalse(data['virtual'])
+
+        # By default, parts are not purchaseable
+        self.assertFalse(data['purchaseable'])
+
+        # Set the default 'purchaseable' status to True
+        InvenTreeSetting.set_setting(
+            'PART_PURCHASEABLE',
+            True,
+            self.user
+        )
+
+        response = self.client.post(url, {
+            'name': 'all defaults',
+            'description': 'my test part 2',
+            'category': 1,
+        })
+
+        # Part should now be purchaseable by default
+        self.assertTrue(response.data['purchaseable'])
+
+        # "default" values should not be used if the value is specified
+        response = self.client.post(url, {
+            'name': 'all defaults',
+            'description': 'my test part 2',
+            'category': 1,
+            'active': False,
+            'purchaseable': False,
+        })
+
+        self.assertFalse(response.data['active'])
+        self.assertFalse(response.data['purchaseable'])
+
 
 class PartDetailTests(InvenTreeAPITestCase):
     """
@@ -392,6 +446,13 @@ class PartDetailTests(InvenTreeAPITestCase):
         # Try to remove the part
         response = self.client.delete(url)
 
+        # As the part is 'active' we cannot delete it
+        self.assertEqual(response.status_code, 405)
+
+        # So, let's make it not active
+        response = self.patch(url, {'active': False}, expected_code=200)
+
+        response = self.client.delete(url)
         self.assertEqual(response.status_code, 204)
 
         # Part count should have reduced
@@ -542,8 +603,6 @@ class PartDetailTests(InvenTreeAPITestCase):
         # And now check that the image has been set
         p = Part.objects.get(pk=pk)
 
-        print("Image:", p.image.file)
-
 
 class PartAPIAggregationTest(InvenTreeAPITestCase):
     """

InvenTree/stock/test_api.py

@@ -354,15 +354,17 @@ class StockItemTest(StockAPITestCase):
         self.assertContains(response, 'does not exist', status_code=status.HTTP_400_BAD_REQUEST)
 
         # POST without quantity
-        response = self.client.post(
+        response = self.post(
             self.list_url,
-            data={
+            {
                 'part': 1,
                 'location': 1,
-            }
+            },
+            expected_code=201,
         )
 
-        self.assertContains(response, 'This field is required', status_code=status.HTTP_400_BAD_REQUEST)
+        # Item should have been created with default quantity
+        self.assertEqual(response.data['quantity'], 1)
         
         # POST with quantity and part and location
         response = self.client.post(