def get_object(self):
kwargs = self.kwargs
form = get_object_or_404(Form, pk=kwargs.get('form_id'))
element_id = kwargs.get('element_id')
element_type = kwargs.get('element_type')
template = form.template
# if the given element id refers to the template's element,
# create an answer for it
element = elements.get(element_type).objects.get(pk=element_id)
if not element.answer_of:
# it is the base base template field
# element must belong to the same template as forms template
if element.field.sub_form.template != template:
return Response({'detail': ['invalid element id']}, status=400)
# check if there is an answer for this element
answer_element = elements.get(element_type).objects.filter(
form=form, answer_of=element)
if not answer_element.exists():
return elements.get(element_type).objects.create(
answer_of=element, form=form)
else:
return answer_element.first()
else:
# element itself is the answer
return element
class Meta:
model = elements.get(element_type)
if not simple:
fields = abstract_element_fields + [
elements.get(element_type).value_field, 'filters',
'display_title', 'uid', 'display_title_full'
]
else:
fields = abstract_element_fields + [
elements.get(element_type).value_field,
'uid',
]
class _CreateSerializer(CreateElementWithData):
# use char field serializer if multiple values are possible for the given element
if elements.get(element_type).value_field == "values":
values = CharFieldSerializer(many=True, required=False)
class Meta:
model = elements.get(element_type)
fields = abstract_element_fields + [model.value_field, ]
def create(self, validated_data):
# if element has multiple values (value filed is "values")
# create values objects
if elements.get(element_type).value_field == "values":
values = validated_data.pop('values', [])
obj = super(_CreateSerializer, self).create(validated_data)
# create values
for value in values:
_value = CharField.objects.create(**value)
obj.values.add(_value)
return obj
else:
# object is single valued
return super(_CreateSerializer, self).create(validated_data)
class SetValueSerializer(serializers.ModelSerializer):
if elements.get(element_type).value_field == "values":
values = CharFieldSerializer(many=True)
class Meta:
model = elements.get(element_type)
fields = ['pk', model.value_field, ]
def update(self, instance, validated_data):
values = validated_data.pop('values', [])
if self.Meta.model.value_field == 'values':
# remove old values and set new values
for value in instance.values.all():
value.delete()
# add new values
for value in values:
_value = CharField(**value)
_value.save()
instance.values.add(_value)
return instance
else:
instance.value = validated_data.get('value')
instance.save()
return instance
class _Serializer(serializers.ModelSerializer):
if elements.get(element_type).value_field == "values":
values = CharFieldSerializer(many=True)
class Meta:
model = elements.get(element_type)
fields = ['pk', model.value_field]
def get_elements(self, instance):
_elements = get_related_attrs(instance)
_elements_data = []
for _element in _elements:
_Serializer = get_retrieve_serializer(type(_element).type)
_element_data = _Serializer(instance=_element).data
if _element.answer_of is None:
# this field is not an answer
# fined it's answer
try:
AnswerModel = elements.get(_element.type)
_obj = AnswerModel.objects.get(
answer_of=_element, form=self.context.get('form'))
_new_data = _Serializer(instance=_obj).data
_element_data[type(_element).value_field] = _new_data[type(
_element).value_field]
except AnswerModel.DoesNotExist:
pass
else:
continue
_elements_data.append(_element_data)
return _elements_data
class _RetrieveSerializer(serializers.ModelSerializer):
data = DataSerializer(many=True)
if not simple:
filters = serializers.SerializerMethodField()
if elements.get(element_type).value_field == "values":
values = CharFieldSerializer(many=True)
class Meta:
model = elements.get(element_type)
if not simple:
fields = abstract_element_fields + [
elements.get(element_type).value_field, 'filters',
'display_title', 'uid', 'display_title_full'
]
else:
fields = abstract_element_fields + [
elements.get(element_type).value_field,
'uid',
]
@staticmethod
def get_filters(instance):
return instance.filters
def perform_create(self, serializer):
data = serializer.save()
# add to element
element = get_object_or_404(elements.get(
self.kwargs.get('element_type')),
pk=self.kwargs.get('element_id'))
element.data.add(data)
def parse_group(self, group):
if not group:
return Q()
matchType = group['matchType']
val = Q()
for rule in group['rules']:
if rule['qtype'] == 'group':
val = self.operator_table[matchType](val,
self.parse_group(rule))
else:
# get element model
_Element = elements.get(rule['type'])
# get value field through related name of the element
_related_field_name_value = "%s__%s" % (
_Element.related_name_to_form(), _Element.value_field)
# to insure that the retrieved element answer corresponds to the queried element
_relate_filed_name_pk = "%s__answer_of__pk" % _Element.related_name_to_form(
)
# serialize the query element, this process converts query json to native types
# that can be used in object filtering
_Serializer = get_raw_converter_serializer(rule['type'])
serializer = _Serializer(data=rule)
serializer.is_valid(raise_exception=True)
_converted_value = serializer.validated_data.get(
_Element.value_field)
if _Element.value_field == "values":
# clear the _converted_value
_converted_value = [v['value'] for v in _converted_value]
match_Q = reduce(
operator.and_, (Q(
**{
self.set_filter_on_field(
_related_field_name_value, rule['filter']):
x
}) for x in _converted_value))
else:
match_Q = Q(
**{
self.set_filter_on_field(_related_field_name_value, rule['filter']):
_converted_value,
})
_pk_filter = {_relate_filed_name_pk: rule['pk']}
val = self.operator_table[matchType](val,
match_Q & Q(**_pk_filter))
return val
def create(self, validated_data):
# if element has multiple values (value filed is "values")
# create values objects
if elements.get(element_type).value_field == "values":
values = validated_data.pop('values', [])
obj = super(_CreateSerializer, self).create(validated_data)
# create values
for value in values:
_value = CharField.objects.create(**value)
obj.values.add(_value)
return obj
else:
# object is single valued
return super(_CreateSerializer, self).create(validated_data)
def validate_elements_data(self, elements_data):
_elements = []
# syntax check element data
for element_data in elements_data:
# syntax check the incoming element data
_element_checks = self.check_attr(element_data,
["type", "pk", "order"])
if _element_checks:
raise serializers.ValidationError(_element_checks)
# get the element model
ElementModel = elements.get(element_data.get('type'))
if not ElementModel:
raise serializers.ValidationError(
"Element with type %s does not exist" %
element_data.get('type'))
# validate element pk
try:
el_pk = int(element_data.get('pk'))
except (TypeError, ValueError):
raise serializers.ValidationError("pk " +
element_data.get('pk') +
" is not a valid integer")
# validate order
try:
el_order = int(element_data.get('order'))
except (TypeError, ValueError):
raise serializers.ValidationError("order " +
element_data.get('order') +
" is not a valid integer")
try:
_element_obj = ElementModel.objects.get(pk=el_pk)
_elements.append({'element': _element_obj, 'order': el_order})
except ElementModel.DoesNotExsit:
raise serializers.ValidationError(
"Element with type %s and pk %d does not exist" %
(element_data.get('type'), element_data.get('pk')))
return _elements
class UpdateSerializer(serializers.ModelSerializer):
data = DataSerializer(many=True)
if elements.get(element_type).value_field == "values":
values = CharFieldSerializer(many=True)
class Meta:
model = elements.get(element_type)
fields = abstract_element_fields + [model.value_field, 'data', ]
def update(self, instance, validated_data):
_data = validated_data.pop('data', [])
_values = validated_data.pop('values', [])
with transaction.atomic():
# delete all data
for __data in instance.data.all():
__data.delete()
# add new data
for __data in _data:
___data = Data.objects.create(**__data)
instance.data.add(___data)
if self.Meta.model.value_field == "values":
# delete all values
for _value in instance.values.all():
_value.delete()
# add values
for _value in _values:
__value = CharField.objects.create(**_value)
instance.values.add(__value)
self.Meta.model.objects.filter(pk=instance.pk).update(**validated_data)
instance.refresh_from_db()
return instance
def get_object(self):
return get_object_or_404(elements.get(self.kwargs.get('element_type')),
pk=self.kwargs.get('element_id'))
class Meta:
model = elements.get(element_type)
fields = ['pk', 'condition_element_type',
'condition_element_pk',
'condition_element_value',
]
class Meta:
model = elements.get(element_type)
fields = abstract_element_fields + [model.value_field, ]
class Meta:
model = elements.get(element_type)
fields = ['pk', model.value_field]
