class EvalExpressionSpec(JsonObject):
type = TypeProperty('evaluator')
statement = StringProperty(required=True)
context_variables = DictProperty(required=True)
datatype = DataTypeProperty(required=False)
def configure(self, context_variables):
self._context_variables = context_variables
def __call__(self, item, context=None):
var_dict = self.get_variables(item, context)
try:
untransformed_value = eval_statements(self.statement, var_dict)
return transform_from_datatype(self.datatype)(untransformed_value)
except (InvalidExpression, SyntaxError, TypeError, ZeroDivisionError):
return None
def get_variables(self, item, context):
var_dict = {
slug: variable_expression(item, context)
for slug, variable_expression in self._context_variables.items()
}
return var_dict
def __str__(self):
value = self.statement
for name, exp in self._context_variables.items():
value.replace(name, str(exp))
if self.datatype:
value = "({}){}".format(self.datatype, value)
return value
class PropertyPathGetterSpec(JsonObject):
type = TypeProperty('property_path')
property_path = ListProperty(six.text_type, required=True)
datatype = DataTypeProperty(required=False)
def __call__(self, item, context=None):
transform = transform_from_datatype(self.datatype)
return transform(safe_recursive_lookup(item, self.property_path))
class PropertyNameGetterSpec(JsonObject):
type = TypeProperty('property_name')
property_name = StringProperty(required=True)
datatype = DataTypeProperty(required=False)
def __call__(self, item, context=None):
raw_value = item.get(self.property_name, None) if isinstance(item, dict) else None
return transform_from_datatype(self.datatype)(raw_value)
class DynamicChoiceListFilterSpec(FilterSpec):
type = TypeProperty('dynamic_choice_list')
show_all = BooleanProperty(default=True)
datatype = DataTypeProperty(default='string')
@property
def choices(self):
return []
class PropertyNameGetterSpec(JsonObject):
type = TypeProperty('property_name')
property_name = DefaultProperty(required=True)
datatype = DataTypeProperty(required=False)
def configure(self, property_name_expression):
self._property_name_expression = property_name_expression
def __call__(self, item, context=None):
raw_value = item.get(self._property_name_expression(item, context)) if isinstance(item, dict) else None
return transform_from_datatype(self.datatype)(raw_value)
class DynamicChoiceListFilterSpec(FilterSpec):
type = TypeProperty('dynamic_choice_list')
show_all = BooleanProperty(default=True)
datatype = DataTypeProperty(default='string')
choice_provider = DictProperty()
def get_choice_provider_spec(self):
return self.choice_provider or {'type': DATA_SOURCE_COLUMN}
@property
def choices(self):
return []
class PropertyPathGetterSpec(JsonObject):
type = TypeProperty('property_path')
property_path = ListProperty(unicode, required=True)
datatype = DataTypeProperty(required=False)
@property
def expression(self):
transform = transform_from_datatype(self.datatype)
getter = NestedDictGetter(self.property_path)
return TransformedGetter(getter, transform)
def __call__(self, item, context=None):
return self.expression(item, context)
class PropertyNameGetterSpec(JsonObject):
type = TypeProperty('property_name')
property_name = StringProperty(required=True)
datatype = DataTypeProperty(required=False)
@property
def expression(self):
transform = transform_from_datatype(self.datatype)
getter = DictGetter(self.property_name)
return TransformedGetter(getter, transform)
def __call__(self, item, context=None):
return self.expression(item, context)
class PropertyPathGetterSpec(JsonObject):
type = TypeProperty('property_path')
property_path = ListProperty(six.text_type, required=True)
datatype = DataTypeProperty(required=False)
def __call__(self, item, context=None):
transform = transform_from_datatype(self.datatype)
return transform(safe_recursive_lookup(item, self.property_path))
def __str__(self):
value = "/".join(self.property_path)
if self.datatype:
"({datatype}){value}".format(datatype=self.datatype, value=value)
return value
class FilterSpec(JsonObject):
"""
This is the spec for a report filter - a thing that should show up as a UI filter element
in a report (like a date picker or a select list).
"""
type = StringProperty(required=True, choices=['date', 'numeric', 'pre', 'choice_list', 'dynamic_choice_list'])
# this shows up as the ID in the filter HTML.
slug = StringProperty(required=True)
field = StringProperty(required=True) # this is the actual column that is queried
display = DefaultProperty()
datatype = DataTypeProperty(default='string')
def get_display(self):
return self.display or self.slug
class ChoiceListFilterSpec(FilterSpec):
type = TypeProperty('choice_list')
show_all = BooleanProperty(default=True)
datatype = DataTypeProperty(default='string')
choices = ListProperty(FilterChoice)
