Perform Upserts Without Schemas

The genres table

To practice upserts, let’s return to the genres table. This table is fairly small and has just two fields:

1. name
2. wiki_tag

We can use the wiki_tag to create a link to the Wikipedia article to learn more about the genre.

We added a unique index on the ‘name’ column when we set up the table in our music_db database. This ensures that we don’t accidentally set up two genres with the same name—we wouldn’t want to create two records for “jazz.” We can use this unique index to help us with our upserts.

Create a new record, twice

First, let’s use insert_all to create a new record for the “ska” genre.