hyperstream/models/meta_data.py
# The MIT License (MIT)
# Copyright (c) 2014-2017 University of Bristol
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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from mongoengine import Document, StringField
class MetaDataModel(Document):
tag = StringField(required=False, min_length=1, max_length=512)
data = StringField(required=False, min_length=1, max_length=512)
parent = StringField(required=False, min_length=1, max_length=512)
@property
def identifier(self):
if self.parent == "root":
return "{}_{}".format(self.tag, self.data)
else:
return "{}.{}_{}".format(self.parent, self.tag, self.data)
meta = {
'collection': 'meta_data',
'indexes': [{'fields': ['tag', 'data', 'parent'], 'unique': True}],
'ordering': ['parent', 'tag', 'data']
}
def to_dict(self):
d = self.to_mongo().to_dict()
del d['_id']
d['data'] = str(d['data'])
d['identifier'] = self.identifier
return d