Created
June 14, 2019 09:38
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many to many associations ecto
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| user = Repo.get!(User, user_id) |> Repo.preload(:roles) | |
| role = Repo.get!(Role, role_id) | |
| user_changeset = Changeset.change(user) |> Changeset.put_assoc(:roles, [role | user.roles]) |
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