Maybe using a Model like Kurtis mentioned will be better (and easier) than making a custom field... ?
Le jeudi 23 août 2012 18:49:55 UTC+2, Michael Palumbo a écrit : > > I did not know the pickle module. This is interesting. Thanks. > However, after playing with it, I am not sure it fits totally my need > because I'd like humans to be able to write a string like > "modulea.moduleb.MyClass" in the admin or so. > > So I kept trying making a custom field (instead of a Model) by creating a > custom > field, formfield and widget. > The list view works well, even though it displays <class > 'modulea.moduleb.MyClass'> instead of modulea.moduleb.MyClass... > The add page works as well, I can add a model with the value " > modulea.moduleb.MyClass" in the field and then it works. > BUT I have an issue with the detail page of a model. > I get a TypeError because my field has a class reference (which is > callable) and the code below then instances it! > > > - > > c:\Users\Mike\Dropbox\development\tools\virtualenvs\django-1.4\lib\site-packages\django\forms\forms.py > in as_widget > 1. > > else: > > 2. > > attrs['id'] = self.html_initial_id > > 3. > > 4. > > if not only_initial: > > 5. > > name = self.html_name > > 6. > > else: > > 7. > > name = self.html_initial_name > > 1. > > return widget.render(name, self.value(), attrs=attrs) > > ... > 1. > > 2. > > def as_text(self, attrs=None, **kwargs): > > 3. > > """ > > 4. > > Returns a string of HTML for representing this as an <input > type="text">. > > 5. > > """ > > 6. > > return self.as_widget(TextInput(), attrs, **kwargs) > > ▼ Local vars <http://127.0.0.1:8000/admin/xmlmapping/mapping/3/#> > VariableValueauto_id > > u'id_mapper_class' > > widget > > <xmlmapping.fieldsbis.PickleWidget object at 0x05B13290> > > name > > 'mapper_class' > > self > > <django.forms.forms.BoundField object at 0x05B1A9F0> > > only_initial > > False > > attrs > > {'id': u'id_mapper_class'} > > - > > c:\Users\Mike\Dropbox\development\tools\virtualenvs\django-1.4\lib\site-packages\django\forms\forms.py > in value > 1. > > """ > > 2. > > Returns the value for this BoundField, using the initial value > if > > 3. > > the form is not bound or the data otherwise. > > 4. > > """ > > 5. > > if not self.form.is_bound: > > 6. > > data = self.form.initial.get(self.name, self.field.initial) > > 7. > > if callable(data): > > 1. > > data = data() > > ... > 1. > > else: > > 2. > > data = self.field.bound_data( > > 3. > > self.data, self.form.initial.get(self.name, > self.field.initial) > > 4. > > ) > > 5. > > return self.field.prepare_value(data) > > 6. > > ▼ Local vars <http://127.0.0.1:8000/admin/xmlmapping/mapping/3/#> > VariableValueself > > <django.forms.forms.BoundField object at 0x05B1A9F0> > > data > > <class 'xmlmapping.mappers.MapperWithNoLog'> > > > > - > > > I overrided the render method of the widget but the errors comes from > self.value() of the BoundField. > How can I fix that? override that? > > Any other idea? > > Thanks. > > > > Le jeudi 23 août 2012 03:27:09 UTC+2, Melvyn Sopacua a écrit : >> >> On 23-8-2012 0:37, Michael Palumbo wrote: >> > ok thanks, so you'd rather do it with a Model than a custom field. >> > I actually started to make a custom field but I had a few issues while >> > displaying it in the admin so that's why I asked the question then. >> >> You can pickle an object and store the result in a blob-type field or >> encode it and put it in a TextArea field: >> <http://docs.python.org/library/pickle.html#pickle> >> It's basically what the session module is doing. Perhaps look there for >> inspiration: >> < >> https://docs.djangoproject.com/en/1.4/topics/http/sessions/#technical-details> >> >> >> >> -- >> Melvyn Sopacua >> > -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/NOxnCEnchLsJ. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
