AI & Machine Learning

Djangonaut diaries, week 3 - Working on an ORM issue

Ali Nemati2 days ago32 sec read2 views

The article discusses an issue in Django where it creates three indexes for many-to-many (m2m) through-tables, including a redundant index on the leftmost column of the composite unique index. The author reproduces this issue by creating models and migrations in Django, then examining the SQL commands generated to create tables and indexes. It is found that database engines like SQLite optimize usage of indexes and prefer using the composite index when possible, making the extra index created by Django unnecessary.

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