fix: #187 return csv field value in widget

CHANGELOG.md

@@ -8,6 +8,8 @@ We follow [Semantic Versions](https://semver.org/) starting at the `0.14.0` rele
 
 ### Bug Fixes
 
+- Fixes AttributeError when using CSVFormField [[#187](https://github.com/jazzband/django-eav2/issues/187)]
+
 ## 1.2.1 (2021-02-08)
 ### Bug Fixes
 

eav/forms.py

@@ -32,17 +32,18 @@ class CSVFormField(forms.Field):
 
     def __init__(self, *args, **kwargs):
         kwargs.pop('max_length', None)
+        self.separator = kwargs.pop('separator', self.default_separator)
         super().__init__(*args, **kwargs)
 
     def to_python(self, value):
         if not value:
             return []
         return [v.strip() for v in value.split(self.separator) if v]
 
-    def validate(self, value):
-        super().validate(value)
+    def validate(self, field_value):
+        super().validate(field_value)
         try:
-            isinstance(value.split(self.separator), list)
+            isinstance(field_value, list)
         except ValidationError:
             raise ValidationError(self.message, code=self.code)
 

eav/widgets.py

@@ -21,3 +21,21 @@ def prep_value(self, value):
     def render(self, name, value, **kwargs):
         value = self.prep_value(value)
         return super().render(name, value, **kwargs)
+
+    def value_from_datadict(self, data, files, name):
+        """
+        Return the value of this widget or None.
+
+        Since we're only given the value of the entity name and the data dict
+        contains the '_eav_config_cls' (which we don't have access to) as the
+        key, we need to loop through each field checking if the eav attribute
+        exists with the given 'name'.
+        """
+        widget_value = None
+        for data_value in data:
+            try:
+                widget_value = getattr(data.get(data_value), name)
+            except AttributeError:
+                pass  # noqa: WPS420
+
+        return widget_value

tests/test_forms.py

@@ -1,5 +1,5 @@
 import sys
-
+import pytest
 from django.contrib.admin.sites import AdminSite
 from django.core.handlers.base import BaseHandler
 from django.forms import ModelForm
@@ -50,6 +50,12 @@ class Meta:
         fields = '__all__'
 
 
+class PatientDynamicForm(BaseDynamicEntityForm):
+    class Meta:
+        model = Patient
+        fields = '__all__'
+
+
 class M2MModelForm(ModelForm):
     class Meta:
         model = M2MModel
@@ -111,3 +117,51 @@ def test_m2m(self):
         form = M2MModelForm(dict(name='Lorem', models=[model.pk]), instance=m2mmodel)
         form.save()
         self.assertEqual(len(m2mmodel.models.all()), 1)
+
+
+@pytest.fixture()
+def patient() -> Patient:
+    """Return an eav enabled Patient instance."""
+    eav.register(Patient)
+    return Patient.objects.create(name='Jim Morrison')
+
+
+@pytest.mark.django_db()
+@pytest.mark.parametrize(
+    'csv_data, separator',
+    [
+        ('', ';'),
+        ('justone', ','),
+        ('one;two;three', ';'),
+        ('alpha,beta,gamma', ','),
+        (None, ','),
+    ],
+)
+def test_csvdynamicform(patient, csv_data, separator) -> None:
+    """Ensure that a TYPE_CSV field works correctly with forms."""
+    Attribute.objects.create(name='csv', datatype=Attribute.TYPE_CSV)
+    patient.eav.csv = csv_data
+    patient.save()
+    patient.refresh_from_db()
+
+    form = PatientDynamicForm(
+        patient.__dict__,
+        instance=patient,
+    )
+    form.fields['csv'].separator = separator
+    assert form.is_valid()
+    jim = form.save()
+
+    expected_result = str(csv_data).split(separator) if csv_data else []
+    assert jim.eav.csv == expected_result
+
+
+@pytest.mark.django_db()
+def test_csvdynamicform_empty(patient) -> None:
+    """Test to ensure an instance with no eav values is correct."""
+    form = PatientDynamicForm(
+        patient.__dict__,
+        instance=patient,
+    )
+    assert form.is_valid()
+    assert form.save()