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I have an array of made up of type BSON::ObjectId and I want it to compare against some IDs as strings.
if my_array_of_BSON_ObjectIds.include?(@my_id_as_a_string)
# delete the item from the array
else
# add the item to the array as a BSON::ObjectId
end
This is not working as the types are different, can I turn my string into a BSON::ObjectId? If so, how?
633
An ObjectID is a 12-byte Field Of BSON type. The first 4 bytes representing the Unix Timestamp of the document. The next 3 bytes are the machine Id on which the MongoDB server is running. The next 2 bytes are of process id. The last Field is 3 bytes used for increment the objectid.
A MongoDB ObjectId is a 12-byte UUID can be used as a HEX string representation with 24 chars in length.
If you do not conditionally test whether expected objectID is valid, you will need to catch the error. Since findOne({ _id: null }) and findOne({ _id: undefined }) are completely valid queries (doesn't throw error), isValidObjectId(undefined) and isValidObjectId(null) will return true.
Mongoid 2.x with 10gen's driver:
BSON::ObjectId.new('506144650ed4c08d84000001')
Mongoid 3 with moped:
Moped::BSON::ObjectId.from_string('506144650ed4c08d84000001')
Mongoid 4 (moped) / Mongoid 5/6/7 (mongo):
BSON::ObjectId.from_string('506144650ed4c08d84000001')
You can use BSON::ObjectId(@my_id_as_a_string) for representation your id as BSON::ObjectId
refs http://api.mongodb.org/ruby/current/BSON.html#ObjectId-class_method
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