"""passbook lib fields"""
from itertools import chain
from django import forms
from django.contrib.postgres.utils import prefix_validation_error
from passbook.lib.widgets import DynamicArrayWidget
class DynamicArrayField(forms.Field):
"""Show array field as a dynamic amount of textboxes"""
default_error_messages = {
"item_invalid": "Item %(nth)s in the array did not validate: "
}
def __init__(self, base_field, **kwargs):
self.base_field = base_field
self.max_length = kwargs.pop("max_length", None)
kwargs.setdefault("widget", DynamicArrayWidget)
super().__init__(**kwargs)
def clean(self, value):
cleaned_data = []
errors = []
value = [x for x in value if x]
for index, item in enumerate(value):
try:
cleaned_data.append(self.base_field.clean(item))
except forms.ValidationError as error:
errors.append(
prefix_validation_error(
error,
self.error_messages["item_invalid"],
code="item_invalid",
params={"nth": index},
)
if errors:
raise forms.ValidationError(list(chain.from_iterable(errors)))
if not cleaned_data and self.required:
raise forms.ValidationError(self.error_messages["required"])
return cleaned_data
def has_changed(self, initial, data):
if not data and not initial:
return False
return super().has_changed(initial, data)
