List length constrains (0.19.0 release) 👗

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.19.0 : 12.07.2021
+
+- **Feature**: `FieldList` and `FormFieldList` now supports optional min/max constrains using `min_length`/`max_length`
+
 ## 0.18.0 : 16.04.2021
 
 - **Feature**: `ModelForm` class introduced (experimental, initial support - not recommended for production)

README.md

@@ -205,4 +205,5 @@ Especially, I have to recommend their database design tool. Many thanks [Navicat
 supporting Open Source projects 🌈.
 
 ---
-Made with ❤️ and ☕️ by Jakub Dubec & [BACKBONE s.r.o.](https://www.backbone.sk/en/)
+Made with ❤️ and ☕️ by Jakub Dubec, [BACKBONE s.r.o.](https://www.backbone.sk/en/) &
+[contributors](https://github.com/Sibyx/django_api_forms/graphs/contributors).

django_api_forms/fields.py

@@ -41,7 +41,7 @@ def has_changed(self, initial, data):
 class FieldList(Field):
     default_error_messages = {
         'max_length': _('Ensure this list has at most %(max)d values (it has %(length)d).'),
-        'min_length': _('Ensure this list has at least %(max)d values (it has %(length)d).'),
+        'min_length': _('Ensure this list has at least %(min)d values (it has %(length)d).'),
         'not_field': _('Invalid Field type passed into FieldList!'),
         'not_list': _('This field needs to be a list of objects!'),
     }
@@ -64,7 +64,7 @@ def to_python(self, value) -> typing.List:
             raise ValidationError(self.error_messages['not_list'], code='not_list')
 
         if self._min_length is not None and len(value) < self._min_length:
-            params = {'max': self._min_length, 'length': len(value)}
+            params = {'min': self._min_length, 'length': len(value)}
             raise ValidationError(self.error_messages['min_length'], code='min_length', params=params)
 
         if self._max_length is not None and len(value) > self._max_length:
@@ -116,7 +116,7 @@ def __init__(self, form: typing.Type, min_length=None, max_length=None, **kwargs
 
     default_error_messages = {
         'max_length': _('Ensure this list has at most %(max)d values (it has %(length)d).'),
-        'min_length': _('Ensure this list has at least %(max)d values (it has %(length)d).'),
+        'min_length': _('Ensure this list has at least %(min)d values (it has %(length)d).'),
         'not_list': _('This field needs to be a list of objects!')
     }
 
@@ -128,7 +128,7 @@ def to_python(self, value):
             raise ValidationError(self.error_messages['not_list'], code='not_list')
 
         if self._min_length is not None and len(value) < self._min_length:
-            params = {'max': self._min_length, 'length': len(value)}
+            params = {'min': self._min_length, 'length': len(value)}
             raise ValidationError(self.error_messages['min_length'], code='min_length', params=params)
 
         if self._max_length is not None and len(value) > self._max_length:

django_api_forms/version.py

@@ -1 +1 @@
-__version__ = '0.18.0'
+__version__ = '0.19.0'

docs/fields.md

@@ -62,8 +62,9 @@ check `FormFieldList`.
 - Error message keys: `not_field`, `not_list`, `min_length`, `max_length`
 - Required arguments:
     - `field`: Instance of a form field representing children
-    - `min_length`: Minimum length of field size in integer (optional)
-    - `max_length`: Maximum length of field size in integer (optional)
+- Optional arguments:
+    - `min_length`: Minimum length of field size as integer
+    - `max_length`: Maximum length of field size as integer
 
 **JSON example**
 
@@ -135,8 +136,9 @@ Field used for embedded objects represented as another API form.
 - Error message keys: `not_list`, `min_length`, `max_length`
 - Required arguments:
     - `form`: Type of a nested form
-    - `min_length`: Minimum length of field size in integer (optional)
-    - `max_length`: Maximum length of field size in integer (optional)
+- Optional arguments:
+    - `min_length`: Minimum length of field size as integer
+    - `max_length`: Maximum length of field size as integer
 
 **JSON example**