Repo.get/1 only covers one primary key id. I want to create macro that implements get function with multiple primary keys. My first try defmacro defquery(:get) do module = __CALLER__.module primary_keys = module.__schema__(:primary_key) args = 0..(Enum.count(primary_keys) - 1…

:wave: How would your macro look at the call-site? What does it have over Repo.get_by(Schema, pk1: pk1, pk2: pk2)?

[image] nallwhy: But module doesn’t have __schema__ when that macro runs. Yes, it’s because __CALLER__ is not yet compiled. You can create a MyApp.Queries module and pass MyApp.MySchema as second argument instead. [image] nallwhy: But I don’t know how to write something like Repo.get_by(…

[image] Eiji: MyApp.Queries.get_post_comment(comment_id, post_id) Allows for an easy typo, get_by is better at least in that regard. Also, I’d make it get_post_comment(post_id, comment_id)?

[image] idi527: Makes it really easy to make a typo, get_by is better at least in that regard. Also, I’d make it get_post_comment(post_id, comment_id) ? Not sure if I remember it correctly, but when using such generator then thing which matter is order of field definition (assuming that there…

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How to create macro to implement get function of Ecto?

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