auction_umbrella/apps/auction/config/config.exs does not exist

[tutcake]

I followed your book, everything was going well till page no 121. In the 5th paragraph, you say config.exs exists in auction_umbrella/apps/auction/config/ but it doesnt exist at all. I am stuck here and need help.

I am using elixir 1.13.0 and erlang/OTP 24. I tried downloading the config folder from this repo and keep in auction_web but still it doesnt work.

I tried to downloading ch6 folder from this repo and start from there, but when I run mix ecto.create, I get an error

`warning: could not find Ecto repos in any of the apps: [:auction, :auction_web].

You can avoid this warning by passing the -r flag or by setting the
repositories managed by those applications in your config/config.exs:

    config :auction, ecto_repos: [...]`

[tutcake]

@geolessel please help

[cesc1989]

Same. Got blocked by this same error message.

[insha]

In case anyone is coming to this and is stuck... A lot has changed in the Elixir/Phoenix world since the book was published and if you are not using the same versions as the book, this kinds of mismatches will surface. But don't lose hope, you can make get through it! 🥇

My understanding is that from with Elixir v1.18+ and Phoenix 1.7+, it's common for new umbrella projects to consolidate all config under the umbrella root's config directory, not inside individual apps.

Therefore, in order to progress from this point you would have to do the following:

1. Update the auction_umbrella/config/config.exs with the following:

config :auction, ecto_repos: [Auction.Repo]

config :auction, Auction.Repo,
  database: ...

2. Update the apps/auction/lib/auction/repo.ex with the following:

defmodule Auction.Repo do
  use Ecto.Repo,
    otp_app: :auction,
    adapter: Ecto.Adapters...
end

3. Update the apps/auction/lib/auction/application.ex with the following:

defmodule Auction.Application do
  use Application

  def start(_type, _args) do
    children = [
      Auction.Repo
    ]

    opts = [strategy: :one_for_one, name: Auction.Supervisor]
    Supervisor.start_link(children, opts)
  end
end

4. Run the mix ecto.create command

At this point step.4 should run successfully. I hope this helps.