add group administration

passbook/core/forms/groups.py

@@ -0,0 +1,30 @@
+"""passbook Core Group forms"""
+from django import forms
+
+from passbook.core.models import Group, User
+
+
+class GroupForm(forms.ModelForm):
+    """Group Form"""
+
+    members = forms.ModelMultipleChoiceField(User.objects.all(), required=False)
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if self.instance.pk:
+            self.initial['members'] = self.instance.user_set.values_list('pk', flat=True)
+
+    def save(self, *args, **kwargs):
+        instance = super().save(*args, **kwargs)
+        if instance.pk:
+            instance.user_set.clear()
+            instance.user_set.add(*self.cleaned_data['users'])
+        return instance
+
+    class Meta:
+
+        model = Group
+        fields = ['name', 'parent', 'members', 'tags']
+        widgets = {
+            'name': forms.TextInput(),
+        }