fix(entry): return None if the nested link is unresolvable

.travis.yml

@@ -2,10 +2,10 @@ sudo: false
 language: python
 python:
     - "2.7"
-    - "3.4"
     - "3.5"
     - "3.6"
-    - "pypy"
+    - "3.7"
+    - "3.8"
     - "pypy3"
 install:
     - pip install -r requirements.txt

CHANGELOG.md

@@ -1,6 +1,8 @@
 # CHANGELOG
 
 ## Unreleased
+### Fixed
+* Unresolved single references fields will no longer return the invalid Link and return None instead, matching behaviour of multiple references fields, where unresolvable links are ignored. [#58](https://github.com/contentful/contentful.py/issues/58)
 
 ## v1.12.3
 ### Fixed

contentful/entry.py

@@ -22,7 +22,9 @@ class Entry(FieldsResource):
     """
 
     def _coerce(self, field_id, value, localized, includes, errors, resources=None):
-        if is_link(value) and not unresolvable(value, errors):
+        if is_link(value):
+            if unresolvable(value, errors):
+                return None
             return self._build_nested_resource(
                 value,
                 localized,

requirements.txt

@@ -1,4 +1,4 @@
-python-dateutil==2.6.0
+python-dateutil==2.8.1
 requests>=2.20.0,<3.0
 
 vcrpy==1.10.3

setup.py

@@ -95,6 +95,7 @@ def get_email(package):
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
     ],
     test_suite='tests',
     tests_require=test_requirements

tests/client_test.py

@@ -198,7 +198,7 @@ def test_client_sync_with_environments(self):
         client = Client('a22o2qgm356c', 'bfbc63cf745a037125dbcc64f716a9a0e9d091df1a79e84920b890f87a6e7ab9', environment='staging', content_type_cache=False)
         sync = client.sync({'initial': True})
 
-        self.assertEquals(sync.items[0].environment.id, 'staging')
+        self.assertEqual(sync.items[0].environment.id, 'staging')
 
     @vcr.use_cassette('fixtures/client/array_endpoints.yaml')
     def test_client_creates_wrapped_arrays(self):

tests/entry_test.py

@@ -42,6 +42,64 @@ def test_entry(self):
         self.assertEqual(entry.name, 'foobar')
         self.assertEqual(entry.date, '2016-06-06')
 
+    def test_entry_unresolved_link(self):
+        ContentTypeCache.__CACHE__ = []
+
+        errors = [
+            {
+                "sys": {
+                    "id": "notResolvable",
+                    "type": "error"
+                },
+                "details": {
+                    "type": "Link",
+                    "linkType": "Entry",
+                    "id": "unresolvedLinkId"
+                }
+            }
+        ]
+
+        entry = Entry(
+            {
+                'sys': {
+                    'space': {
+                        'sys': {
+                            'type': 'Link',
+                            'linkType': 'Space',
+                            'id': 'foo'
+                        }
+                    },
+                    'contentType': {
+                        'sys': {
+                            'type': 'Link',
+                            'linkType': 'ContentType',
+                            'id': 'foo'
+                        }
+                    },
+                    'type': 'Entry',
+                    'createdAt': '2016-06-06',
+                    'updatedAt': '2016-06-06',
+                    'deletedAt': '2016-06-06',
+                    'id': 'foobar',
+                    'version': 1
+                },
+                'fields': {
+                    'name': 'foobar',
+                    'entryLink': {
+                        'sys': {
+                            'type': 'Link',
+                            'linkType': 'Entry',
+                            'id': 'unresolvedLinkId'
+                        }
+                    }
+                }
+            },
+            None,
+            errors
+        )
+
+        self.assertEqual(entry.fields().get('entryLink'), None)
+
     def test_cached_content_type_entry(self):
         ContentTypeCache.__CACHE__ = []