405ff8cb7a
Given the number of kwargs that some constructors take, perhaps the
better thing would be to be able to say "this field gets these
kwargs", so we could instead pass something like
other = { 'foo': {'queryset': Foo.objects.all()}, 'bar': {'fwip': 'baz'} }.
- Legacy-Id: 147
77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
## formfield_callback generator
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## http://www.djangosnippets.org/snippets/59/
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def form_decorator(fields = {}, attrs = {}, widgets = {},
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labels = {}, choices = {}, querysets = {}):
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"""
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This function helps to add overrides when creating forms from models/instances.
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Pass in dictionary of fields to override certain fields altogether, otherwise
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add widgets or labels as desired.
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For example:
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class Project(models.Model):
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name = models.CharField(maxlength = 100)
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description = models.TextField()
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owner = models.ForeignKey(User)
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project_fields = dict(
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owner = None
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)
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project_widgets = dict(
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name = forms.TextInput({"size":40}),
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description = forms.Textarea({"rows":5, "cols":40}))
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project_labels = dict(
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name = "Enter your project name here"
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)
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callback = form_decorator(project_fields, project_widgets, project_labels)
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project_form = forms.form_for_model(Project, formfield_callback = callback)
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This saves having to redefine whole fields for example just to change a widget
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setting or label.
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"""
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def formfields_callback(f, **kw):
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if f.name in fields:
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# replace field altogether
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field = fields[f.name]
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f.initial = kw.pop("initial", None)
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return field
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if f.name in widgets:
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kw["widget"] = widgets[f.name]
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if f.name in attrs:
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widget = kw.pop("widget", f.formfield().widget)
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if widget :
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widget.attrs.update(attrs[f.name])
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kw["widget"] = widget
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if f.name in labels:
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kw["label"] = labels[f.name]
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if f.name in choices:
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choice_set = choices[f.name]
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if callable(choice_set) : choice_set = choice_set()
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kw["choices"] = choice_set
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if f.name in querysets:
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kw["queryset"] = querysets[f.name]
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return f.formfield(**kw)
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return formfields_callback
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