Work-around for non-standard values in error source. Fixes #91

Author: f3ath

.travis.yml

@@ -5,6 +5,7 @@ dart:
   - "2.6.0"
   - "2.6.1"
   - "2.7.0"
+  - "2.8.0"
 dart_task:
   - test: --platform vm
   - test: --platform chrome

lib/src/document/error_object.dart

@@ -32,13 +32,17 @@ class ErrorObject implements JsonEncodable {
 
   static ErrorObject fromJson(Object json) {
     if (json is Map) {
+      final source = json['source'];
       return ErrorObject(
           id: json['id'],
           status: json['status'],
           code: json['code'],
           title: json['title'],
           detail: json['detail'],
-          source: json['source'],
+          source: source is Map
+              ? source.map(
+                  (key, value) => MapEntry(key.toString(), value.toString()))
+              : {},
           meta: json['meta'],
           links: nullable(Link.mapFromJson)(json['links']) ?? const {});
     }

test/unit/document/json_api_error_test.dart

@@ -31,4 +31,18 @@ void main() {
           'http://example.com');
     });
   });
+
+  group('parsing', () {
+    // see https://github.com/f3ath/json-api-dart/issues/91
+    test('non-standard keys/values in the source object casted to string', () {
+      final e = ErrorObject.fromJson({
+        'detail': 'Oops',
+        'source': {'file': '/some/file.php', 'line': 42, 'parameter': 'foo'}
+      });
+      expect(e.detail, 'Oops');
+      expect(e.source['parameter'], 'foo');
+      expect(e.source['file'], '/some/file.php');
+      expect(e.source['line'], '42');
+    });
+  });
 }