Seeding database with unique assocs

Questions / Help
1

Hey,

is there a comfortable way to seed the database that has a table which associates a table with a unique constraint. I want to create or use my assocs on-the-fly

%{length: 11, 
  width: 20, 
  bg_color: %{color: "red"}, 
  border_color: %{color: "red"}
}

When I cast_assoc my association bg_color is inserted into the Color table, but when casting the border_color, I get a unique-constraint error.

Sure, I could create all colors beforehand and then just put_assoc them, but that’s not so convenient to handle with Ids.

I wrote a function get_or_insert() which I use like that:

%{length: 11, 
  width: 20, 
  bg_color: Color.get_or_insert(color: "red"), 
  border_color: get_or_insert(color: "red")
}

But I ask myself if there’s a builtin Ecto way to do this?

2

You can try to using the insert_all with the on_conflict option to trigger the upsert behavior.

You can se the documentation here: https://hexdocs.pm/ecto/Ecto.Repo.html#c:insert_all/3

Best regards,

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