A Widget for displaying ManyToMany ids in the "raw_id" interface rather than in a <select multiple> box. Display user-friendly value like the ForeignKeyRawId widget
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | from django.contrib.admin.widgets import ManyToManyRawIdWidget
from django.utils.encoding import smart_str
from django.urls import reverse
from django.utils.html import escape, mark_safe
class VerboseManyToManyRawIdWidget(ManyToManyRawIdWidget):
"""
A Widget for displaying ManyToMany ids in the "raw_id" interface rather than
in a <select multiple> box. Display user-friendly value like the ForeignKeyRawId widget
"""
def __init__(self, remote_field, attrs=None, *args, **kwargs):
super().__init__(remote_field, attrs, *args, **kwargs)
def label_and_url_for_value(self, value):
values = value
str_values = []
field = self.rel.get_related_field()
key = field.name
fk_model = self.rel.model
app_label = fk_model._meta.app_label
class_name = fk_model._meta.object_name.lower()
for the_value in values:
try:
obj = fk_model._default_manager.using(self.db).get(**{key: the_value})
url = reverse('admin:{0}_{1}_change'.format(app_label, class_name), args=[obj.id])
label = escape(smart_str(obj))
elt = '<a href="{0}" {1}>{2}</a>'.format(
url,
'onclick="return showAddAnotherPopup(this);" target="_blank"',
label
)
str_values += [elt]
except fk_model.DoesNotExist:
str_values += [u'???']
return mark_safe(', '.join(str_values)), ''
class MyAdmin(admin.ModelAdmin):
...
def formfield_for_dbfield(self, db_field, **kwargs):
if db_field.name in ('groups', ):
kwargs['widget'] = VerboseManyToManyRawIdWidget(db_field.remote_field, self.admin_site)
else:
return super().formfield_for_dbfield(db_field, **kwargs)
kwargs.pop('request')
return db_field.formfield(**kwargs)
|
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