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add_foreign_key can now detect table and pk, refs #25

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Simon Willison 2019-06-12 21:51:09 -07:00
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docs/python-api.rst
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@ -334,6 +334,11 @@ Here's an example of this mechanism in action:
])
db["books"].add_foreign_key("author_id", "authors", "id")
The ``table.add_foreign_key(column, other_table, other_column)`` method takes the name of the column, the table that is being referenced and the key column within that other table. If you ommit the ``other_column`` argument the primary key from that table will be used automatically. If you omit the ``other_table`` argument the table will be guessed based on some simple rules:
- If the column is of format ``author_id``, look for tables called ``author`` or ``authors``
- If the column does not end in ``_id``, try looking for a table with the exact name of the column or that name with an added ``s``
.. _python_api_hash:
Setting an ID based on the hash of the row contents