added new LocalizedCharField, LocalizedTextField and LocalizedFileField fields

localized_fields/forms.py

@@ -2,10 +2,13 @@ from typing import List
 
 from django import forms
 from django.conf import settings
+from django.core.exceptions import ValidationError
+from django.forms.widgets import FILE_INPUT_CONTRADICTION
 
-from .localized_value import LocalizedValue
-from .widgets import LocalizedFieldWidget
-
+from .localized_value import LocalizedValue, LocalizedStingValue, \
+    LocalizedFileValue
+from .widgets import LocalizedFieldWidget, LocalizedCharFieldWidget, \
+    LocalizedFileWidget
 
 
 class LocalizedFieldForm(forms.MultiValueField):
@@ -13,6 +16,7 @@ class LocalizedFieldForm(forms.MultiValueField):
     the field in multiple languages."""
 
     widget = LocalizedFieldWidget
+    field_class = forms.fields.CharField
     value_class = LocalizedValue
 
     def __init__(self, *args, **kwargs):
@@ -27,7 +31,7 @@ class LocalizedFieldForm(forms.MultiValueField):
                 field_options['required'] = kwargs.get('required', True)
 
             field_options['label'] = lang_code
-            fields.append(forms.fields.CharField(**field_options))
+            fields.append(self.field_class(**field_options))
 
         super(LocalizedFieldForm, self).__init__(
             fields,
@@ -57,3 +61,106 @@ class LocalizedFieldForm(forms.MultiValueField):
             localized_value.set(lang_code, value)
 
         return localized_value
+
+
+class LocalizedCharFieldForm(LocalizedFieldForm):
+    """Form for a localized char field, allows editing
+    the field in multiple languages."""
+
+    widget = LocalizedCharFieldWidget
+    value_class = LocalizedStingValue
+
+
+class LocalizedTextFieldForm(LocalizedFieldForm):
+    """Form for a localized text field, allows editing
+    the field in multiple languages."""
+
+    value_class = LocalizedStingValue
+
+
+class LocalizedFileFieldForm(LocalizedFieldForm, forms.FileField):
+    """Form for a localized file field, allows editing
+    the field in multiple languages."""
+
+    widget = LocalizedFileWidget
+    field_class = forms.fields.FileField
+    value_class = LocalizedFileValue
+
+    def clean(self, value, initial=None):
+        """
+        Most part of this method is a copy of 
+        django.forms.MultiValueField.clean, with the exception of initial
+        value handling (this need for correct processing FileField's).
+        All original comments saved.
+        """
+        if initial is None:
+            initial = [None for x in range(0, len(value))]
+        else:
+            if not isinstance(initial, list):
+                initial = self.widget.decompress(initial)
+
+        clean_data = []
+        errors = []
+        if not value or isinstance(value, (list, tuple)):
+            if (not value or not [v for v in value if
+                                  v not in self.empty_values]) \
+                    and (not initial or not [v for v in initial if
+                                             v not in self.empty_values]):
+                if self.required:
+                    raise ValidationError(self.error_messages['required'],
+                                          code='required')
+        else:
+            raise ValidationError(self.error_messages['invalid'],
+                                  code='invalid')
+        for i, field in enumerate(self.fields):
+            try:
+                field_value = value[i]
+            except IndexError:
+                field_value = None
+            try:
+                field_initial = initial[i]
+            except IndexError:
+                field_initial = None
+            if field_value in self.empty_values and \
+                            field_initial in self.empty_values:
+                if self.require_all_fields:
+                    # Raise a 'required' error if the MultiValueField is
+                    # required and any field is empty.
+                    if self.required:
+                        raise ValidationError(self.error_messages['required'],
+                                              code='required')
+                elif field.required:
+                    # Otherwise, add an 'incomplete' error to the list of
+                    # collected errors and skip field cleaning, if a required
+                    # field is empty.
+                    if field.error_messages['incomplete'] not in errors:
+                        errors.append(field.error_messages['incomplete'])
+                    continue
+            try:
+                clean_data.append(field.clean(field_value, field_initial))
+            except ValidationError as e:
+                # Collect all validation errors in a single list, which we'll
+                # raise at the end of clean(), rather than raising a single
+                # exception for the first error we encounter. Skip duplicates.
+                errors.extend(m for m in e.error_list if m not in errors)
+        if errors:
+            raise ValidationError(errors)
+
+        out = self.compress(clean_data)
+        self.validate(out)
+        self.run_validators(out)
+        return out
+
+    def bound_data(self, data, initial):
+        bound_data = []
+        if initial is None:
+            initial = [None for x in range(0, len(data))]
+        else:
+            if not isinstance(initial, list):
+                initial = self.widget.decompress(initial)
+        for d, i in zip(data, initial):
+            if d in (None, FILE_INPUT_CONTRADICTION):
+                bound_data.append(i)
+            else:
+                bound_data.append(d)
+        return bound_data