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from lunr.exceptions import BaseLunrException
class FieldRef:
JOINER = "/"
def __init__(self, doc_ref, field_name, string_value=None):
self.doc_ref = doc_ref
self.field_name = field_name
self._string_value = string_value
def __repr__(self):
return '<FieldRef field="{}" ref="{}">'.format(self.field_name, self.doc_ref)
@classmethod
def from_string(cls, string):
if cls.JOINER not in string:
raise BaseLunrException("Malformed field ref string")
field_ref, doc_ref = string.split(cls.JOINER, 1)
return cls(doc_ref, field_ref, string)
def __str__(self):
if self._string_value is None:
self._string_value = self.field_name + self.JOINER + str(self.doc_ref)
return self._string_value
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