def __init__(self, form, context, *args, **kwargs):
"""
Dynamically add each of the form fields for the given form model
instance and its related field model instances.
"""
self.form = form
self.form_fields = form.fields.visible()
initial = kwargs.pop("initial", {})
# If a FormEntry instance is given to edit, populate initial
# with its field values.
field_entries = {}
if kwargs.get("instance"):
for field_entry in kwargs["instance"].fields.all():
field_entries[field_entry.field_id] = field_entry.value
super(FormForForm, self).__init__(*args, **kwargs)
# Create the form fields.
for field in self.form_fields:
field_key = "field_%s" % field.id
field_class = fields.CLASSES[field.field_type]
field_widget = fields.WIDGETS.get(field.field_type)
field_args = {
"label": field.label,
"required": field.required,
"help_text": field.help_text
}
arg_names = field_class.__init__.__code__.co_varnames
if "max_length" in arg_names:
field_args["max_length"] = settings.FORMS_FIELD_MAX_LENGTH
if "choices" in arg_names:
choices = list(field.get_choices())
if (field.field_type == fields.SELECT
and field.default not in [c[0] for c in choices]):
choices.insert(0, ("", field.placeholder_text))
field_args["choices"] = choices
if field_widget is not None:
field_args["widget"] = field_widget
#
# Initial value for field, in order of preference:
#
# - If a form model instance is given (eg we're editing a
# form response), then use the instance's value for the
# field.
# - If the developer has provided an explicit "initial"
# dict, use it.
# - The default value for the field instance as given in
# the admin.
#
initial_val = None
try:
initial_val = field_entries[field.id]
except KeyError:
try:
initial_val = initial[field_key]
except KeyError:
initial_val = str(Template(field.default).render(context))
if initial_val:
if field.is_a(*fields.MULTIPLE):
initial_val = split_choices(initial_val)
elif field.field_type == fields.CHECKBOX:
initial_val = initial_val != "False"
self.initial[field_key] = initial_val
self.fields[field_key] = field_class(**field_args)
if field.field_type == fields.DOB:
_now = datetime.now()
years = list(range(_now.year, _now.year - 120, -1))
self.fields[field_key].widget.years = years
# Add identifying type attr to the field for styling.
setattr(self.fields[field_key], "type",
field_class.__name__.lower())
if (field.required and settings.FORMS_USE_HTML5
and field.field_type != fields.CHECKBOX_MULTIPLE):
self.fields[field_key].widget.attrs["required"] = ""
if field.placeholder_text and not field.default:
text = field.placeholder_text
self.fields[field_key].widget.attrs["placeholder"] = text
# The filter function for each filter type
FILTER_FUNCS = {
FILTER_CHOICE_CONTAINS:
lambda val, field: val.lower() in field.lower(),
FILTER_CHOICE_DOESNT_CONTAIN:
lambda val, field: val.lower() not in field.lower(),
FILTER_CHOICE_EQUALS:
lambda val, field: val.lower() == field.lower(),
FILTER_CHOICE_DOESNT_EQUAL:
lambda val, field: val.lower() != field.lower(),
FILTER_CHOICE_BETWEEN:
lambda val_from, val_to, field:
((not val_from or val_from <= field) and (not val_to or val_to >= field)),
FILTER_CHOICE_CONTAINS_ANY:
lambda val, field: set(val) & set(split_choices(field)),
FILTER_CHOICE_CONTAINS_ALL:
lambda val, field: set(val) == set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ANY:
lambda val, field: not set(val) & set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ALL:
lambda val, field: set(val) != set(split_choices(field)),
}
# Export form fields for each filter type grouping
text_filter_field = forms.ChoiceField(label=" ",
required=False,
choices=TEXT_FILTER_CHOICES)
choice_filter_field = forms.ChoiceField(label=" ",
required=False,
choices=CHOICE_FILTER_CHOICES)
FILTER_FUNCS = {
FILTER_CHOICE_CONTAINS:
lambda val, field: val.lower() in field.lower(),
FILTER_CHOICE_DOESNT_CONTAIN:
lambda val, field: val.lower() not in field.lower(),
FILTER_CHOICE_EQUALS:
lambda val, field: val.lower() == field.lower(),
FILTER_CHOICE_DOESNT_EQUAL:
lambda val, field: val.lower() != field.lower(),
FILTER_CHOICE_BETWEEN:
lambda val_from, val_to, field: (
(not val_from or val_from <= field) and
(not val_to or val_to >= field)
),
FILTER_CHOICE_CONTAINS_ANY:
lambda val, field: set(val) & set(split_choices(field)),
FILTER_CHOICE_CONTAINS_ALL:
lambda val, field: set(val) == set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ANY:
lambda val, field: not set(val) & set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ALL:
lambda val, field: set(val) != set(split_choices(field)),
}
# Export form fields for each filter type grouping
text_filter_field = forms.ChoiceField(label=" ", required=False,
choices=TEXT_FILTER_CHOICES)
choice_filter_field = forms.ChoiceField(label=" ", required=False,
choices=CHOICE_FILTER_CHOICES)
multiple_filter_field = forms.ChoiceField(label=" ", required=False,
choices=MULTIPLE_FILTER_CHOICES)
def __init__(self, form, context, *args, **kwargs):
"""
Dynamically add each of the form fields for the given form model
instance and its related field model instances.
"""
self.form = form
self.form_fields = form.fields.visible()
initial = kwargs.pop("initial", {})
# If a FormEntry instance is given to edit, populate initial
# with its field values.
field_entries = {}
if kwargs.get("instance"):
for field_entry in kwargs["instance"].fields.all():
field_entries[field_entry.field_id] = field_entry.value
super(FormForForm, self).__init__(*args, **kwargs)
# Create the form fields.
for field in self.form_fields:
field_key = "field_%s" % field.id
field_class = fields.CLASSES[field.field_type]
field_widget = fields.WIDGETS.get(field.field_type)
field_args = {"label": field.label, "required": field.required,
"help_text": field.help_text}
if field.required and not field.help_text:
field_args["help_text"] = _("required")
arg_names = field_class.__init__.__code__.co_varnames
if "max_length" in arg_names:
field_args["max_length"] = settings.FORMS_FIELD_MAX_LENGTH
if "choices" in arg_names:
field_args["choices"] = field.get_choices()
if field_widget is not None:
field_args["widget"] = field_widget
#
# Initial value for field, in order of preference:
#
# - If a form model instance is given (eg we're editing a
# form response), then use the instance's value for the
# field.
# - If the developer has provided an explicit "initial"
# dict, use it.
# - The default value for the field instance as given in
# the admin.
#
initial_val = None
try:
initial_val = field_entries[field.id]
except KeyError:
try:
initial_val = initial[field_key]
except KeyError:
initial_val = Template(field.default).render(context)
if initial_val:
if field.is_a(*fields.MULTIPLE):
initial_val = split_choices(initial_val)
elif field.field_type == fields.CHECKBOX:
initial_val = initial_val != "False"
self.initial[field_key] = initial_val
self.fields[field_key] = field_class(**field_args)
if field.field_type == fields.DOB:
_now = datetime.now()
years = list(range(_now.year, _now.year - 120, -1))
self.fields[field_key].widget.years = years
# Add identifying type attr to the field for styling.
setattr(self.fields[field_key], "type",
field_class.__name__.lower())
if (field.required and settings.FORMS_USE_HTML5 and
field.field_type != fields.CHECKBOX_MULTIPLE):
self.fields[field_key].widget.attrs["required"] = ""
if field.placeholder_text and not field.default:
text = field.placeholder_text
self.fields[field_key].widget.attrs["placeholder"] = text
(FILTER_CHOICE_DOESNT_CONTAIN_ALL, _("Doesn't contain all")),
)
# Dates
DATE_FILTER_CHOICES = (("", _("Nothing")), (FILTER_CHOICE_BETWEEN, _("Is between")))
# The filter function for each filter type
FILTER_FUNCS = {
FILTER_CHOICE_CONTAINS: lambda val, field: val.lower() in field.lower(),
FILTER_CHOICE_DOESNT_CONTAIN: lambda val, field: val.lower() not in field.lower(),
FILTER_CHOICE_EQUALS: lambda val, field: val.lower() == field.lower(),
FILTER_CHOICE_DOESNT_EQUAL: lambda val, field: val.lower() != field.lower(),
FILTER_CHOICE_BETWEEN: lambda val_from, val_to, field: (
(not val_from or val_from <= field) and (not val_to or val_to >= field)
),
FILTER_CHOICE_CONTAINS_ANY: lambda val, field: set(val) & set(split_choices(field)),
FILTER_CHOICE_CONTAINS_ALL: lambda val, field: set(val) == set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ANY: lambda val, field: not set(val) & set(split_choices(field)),
FILTER_CHOICE_DOESNT_CONTAIN_ALL: lambda val, field: set(val) != set(split_choices(field)),
}
# Export form fields for each filter type grouping
text_filter_field = forms.ChoiceField(label=" ", required=False, choices=TEXT_FILTER_CHOICES)
choice_filter_field = forms.ChoiceField(label=" ", required=False, choices=CHOICE_FILTER_CHOICES)
multiple_filter_field = forms.ChoiceField(label=" ", required=False, choices=MULTIPLE_FILTER_CHOICES)
date_filter_field = forms.ChoiceField(label=" ", required=False, choices=DATE_FILTER_CHOICES)
class FormForForm(forms.ModelForm):
"""
Form with a set of fields dynamically assigned, directly based on the
