DictionaryField 🤑

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.0 : 13.11.2019
+
+- **Feature**: Introduced `DictionaryField`
+
 ## 0.3.0 : 11.11.2019
 
 - **Feature**: Propagate `kwargs` from `Form.is_valid()` to `Form.validate()` and `Form.validate_{key}()` methods.

README.md

@@ -69,7 +69,10 @@ python setup.py install
       "duration": "4:48"
     }
   ],
-  "created_at": "2019-10-21T18:57:03+00:00"
+  "metadata": {
+    "created_at": "2019-10-21T18:57:03+00:00",
+    "updated_at": "2019-10-21T18:57:03+00:00"
+  }
 }
 ```
 
@@ -97,7 +100,7 @@ class AlbumForm(Form):
     year = fields.IntegerField()
     artist = fields.FormField(form=ArtistForm)
     songs = fields.FormFieldList(form=SongForm)
-    created_at = fields.DateField()
+    metadata = fields.DictionaryField(fields.DateTimeField())
 
     def validate_year(self, value):
         if value == "1992":

django_request_formatter/__version__.py

@@ -1 +1 @@
-__version__ = '0.3.0'
+__version__ = '0.4.0'

django_request_formatter/fields.py

@@ -340,6 +340,7 @@ def validate(self, value):
             if isinstance(self.field, Field):
                 self.field.validate(item)
             else:
+                # TODO: toto nemoze byt RuntimeError
                 raise RuntimeError(f"Invalid field_type {type(self.field)} in FieldList")
 
 
@@ -408,3 +409,34 @@ def validate(self, value):
                 self.enum(value)
             except ValueError:
                 raise ValidationError(f"Invalid enum value {value} passed to {type(self.enum)}")
+
+
+class DictionaryField(Field):
+    def __init__(self, value, **kwargs):
+        if not isinstance(value, Field):
+            raise RuntimeError("Invalid Field type passed into DictionaryField!")
+        self._value = value
+        super().__init__(**kwargs)
+
+    def to_python(self, value) -> dict:
+        result = {}
+
+        for key, item in value.items():
+            result[key] = self._value.to_python(item)
+
+        return result
+
+    def validate(self, value):
+        if not isinstance(value, dict):
+            raise ValidationError(f"Invalid value passed to DictionaryField (got {type(value)}, expected dict)")
+
+        errors = {}
+
+        for key, item in value.items():
+            try:
+                self._value.validate(value)
+            except ValidationError as e:
+                errors[key] = e
+
+        if errors:
+            raise ValidationError(errors)