Named associations?

Questions / Help
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1

Hi, is there a way to have named association, please? Akin to Rails/ActiveRecord as: option. Something like this:

many_to_many :users, as: :members

I just can’t find it anywhere. Which leads me to believe it’s probably done some other way? Thank you.

2

If I’m not mistaken this is already possible. You pick a name and then specify how this is sourced:

many_to_many :tags, MyApp.Tag, join_through: "posts_tags"
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3

This just specifies the join table name, doesn’t it? I have two models: User and Class. I have many to many association - each user can enroll to many classes, each class has many members. And I want to call them “members” rather than “users”, to make the naming a bit less misleading.

4

You can freely choose how you name the many_to_many field on a schema. There’s some defaults based on field name, but all of them can be also manually set to match how things are named in the db.

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5

many_to_many :members, YourApp.User, join_through: "classes_users" should do it for you.

You can then do: YourApp.Repo.preload(class, :members) and you will get the users as values in a members key.

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