def get_attr(obj, attr):
"""
Return class atributte.
Example:
{{ obj|get_attr:"my_atribute" }}
"""
return get_value_by_relation_path(obj, attr)
def _get_component(self, model_type, field_path):
# use cached components if already prefetched (using prefetch_related)
# otherwise, perform regular SQL query
try:
components = self._prefetched_objects_cache['virtualcomponent_set']
except (KeyError, AttributeError):
return self.virtualcomponent_set.filter(
model__type=model_type).values_list(field_path,
flat=True).first()
else:
for component in components:
if component.model.type == model_type:
return get_value_by_relation_path(component, field_path)
return None
def _parse_item(self, item):
"""
Get item fields values (using django __ (double-underscore) convention
for related fields).
"""
result = {}
for f in self._invoice_report_item_fields:
val = get_value_by_relation_path(item, f)
# when it's function - call it! usefull for Choices
# (get_<field_name>_display)
if callable(val):
val = val()
elif isinstance(val, datetime.datetime):
val = val.strftime(self._invoice_report_datetime_format)
result[f] = str(val or self._invoice_report_empty_value)
return result
def autocomplete_tooltip(self):
empty_element = '<empty>'
tooltip = []
for field in self.autocomplete_tooltip_fields:
try:
model_field = get_field_by_relation_path(self, field)
except FieldDoesNotExist:
logger.warning(
'Autocomplete tooltip field %s not found for %s', field,
self._meta.model_name)
continue
value = get_value_by_relation_path(self, field)
if isinstance(model_field.choices, Choices):
value = model_field.choices.name_from_id(value)
label = str(model_field.verbose_name)
if isinstance(value, Manager):
value = ', '.join(map(str, value.all()))
tooltip.append('{}: {}'.format(label.capitalize(), value
or empty_element))
return '\n'.join(tooltip)