def __init__(self, schema_or_value=unspecified, this_side_fields=None, other_side_fields=None):
self.rendered = False
from tableau.containers import DatumBase
self._value = None
self._value_set = False
if isinstance(schema_or_value, DatumBase):
self.schema = schema_or_value._tableau_schema
self.value = schema_or_value
elif schema_or_value is None:
self.schema = schema_or_value
self.value = None
elif isinstance(schema_or_value, basestring):
self.schema = schema_or_value
elif schema_or_value is not unspecified:
raise TypeError("schema_or_value must be a DatumBase, None, or Unspecified")
self.this_side_fields = string_container_from_value(this_side_fields, tuple)
self.other_side_fields = string_container_from_value(other_side_fields, tuple)
def __init__(self, collection, referring_fields=None, referred_fields=None):
self.collection = collection
self.referring_fields = string_container_from_value(referring_fields, tuple)
self.referred_fields = string_container_from_value(referred_fields, tuple)
def __init__(self, collection, this_side_fields, other_side_fields, via=None):
self.collection = collection
self.this_side_fields = string_container_from_value(this_side_fields, tuple)
self.other_side_fields = string_container_from_value(other_side_fields, tuple)
self.via = via
