arangodb/Documentation/DocuBlocks/documentsDocumentExists.md

@brief checks whether a document exists db._exists(document)

This method determines whether a document exists given its identifier. Instead of returning the found document or an error, this method will return either true or false. It can thus be used for easy existence checks.

No error will be thrown if the sought document or collection does not exist. Still this method will throw an error if used improperly, e.g. when called with a non-document handle.

db._exists(document-handle)

As before, but instead of a document a document-handle can be passed.