mnemosine.exceptions.LinkExists

Kind: class

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class LinkExists

Documentation

Raised when a duplicate link would be created.

The base schema treats (source_id, target_id, link_type) as a primary key. mnemosine.Link.create is idempotent and returns the existing link instead of raising; this exception remains for callers that pass INSERT-style semantics.

Example:

>>> from mnemosine import LinkExists
>>> raise LinkExists("link already present")
Traceback (most recent call last):
...
mnemosine.exceptions.LinkExists: link already present