"Could not lookup Ecto repo" error during tests - postgresql

Question

I've been getting the following exception when trying to setup a new ecto repo. Currently only using it for testing (since i am just setting this up).
** (RuntimeError) could not lookup Ecto repo Lipwig.AnnotatedUnit.Repo because it was not started or it does not exist
This happens when my tests use Lipwig.AnnotatedUnit.DataCase. However, when i use Lipwig.DataCase (which references the Lipwig.Repo`), the tests run fine.
I have the following setup in the project.
defmodule Lipwig.Repo do
use Ecto.Repo,
otp_app: :lipwig,
adapter: Ecto.Adapters.Postgres
end
defmodule Lipwig.AnnotatedUnit.Repo do
use Ecto.Repo,
otp_app: :lipwig,
adapter: Ecto.Adapters.Postgres
end
This here is my test setup
defmodule Lipwig.DataCase do
use ExUnit.CaseTemplate
using do
quote do
alias Lipwig.Repo
import Ecto
import Ecto.Changeset
import Ecto.Query
import Lipwig.DataCase
end
end
setup tags do
:ok = Ecto.Adapters.SQL.Sandbox.checkout(Lipwig.Repo)
unless tags[:async] do
Ecto.Adapters.SQL.Sandbox.mode(Lipwig.Repo, {:shared, self()})
end
:ok
end
def errors_on(changeset) do
Ecto.Changeset.traverse_errors(changeset, fn {message, opts} ->
Regex.replace(~r"%{(\w+)}", message, fn _, key ->
opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string()
end)
end)
end
end
defmodule Lipwig.AnnotatedUnit.DataCase do
use ExUnit.CaseTemplate
using do
quote do
alias Lipwig.AnnotatedUnit.Repo
import Ecto
import Ecto.Changeset
import Ecto.Query
import Lipwig.AnnotatedUnit.DataCase
end
end
setup tags do
:ok = Ecto.Adapters.SQL.Sandbox.checkout(Lipwig.AnnotatedUnit.Repo)
unless tags[:async] do
Ecto.Adapters.SQL.Sandbox.mode(Lipwig.AnnotatedUnit.Repo, {:shared, self()})
end
:ok
end
def errors_on(changeset) do
Ecto.Changeset.traverse_errors(changeset, fn {message, opts} ->
Regex.replace(~r"%{(\w+)}", message, fn _, key ->
opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string()
end)
end)
end
end
My other datacase for Lipwig.Repo is almost identical, just referencing the other repo.
My config.exs config defines
config :lipwig,
ecto_repos: [Lipwig.Repo, Lipwig.AnnotatedUnit.Repo]
My test.exs config is
config :lipwig, Lipwig.Repo,
username: "postgres",
password: "postgres",
database: "lipwig_test",
hostname: "localhost",
pool: Ecto.Adapters.SQL.Sandbox
config :lipwig, Lipwig.AnnotatedUnit.Repo,
username: "postgres",
password: "postgres",
database: "lipwig_test",
hostname: "localhost",
pool: Ecto.Adapters.SQL.Sandbox

Answer 1

As per my knowledge, the configurations seem fine. As the error suggests, I think the issue might be because you are not starting the Lipwig.AnnotatedUnit.Repo in with you application.
Look for the application.ex file in the /lib/lipwig_web folder and make sure that Lipwig.AnnotatedUnit.Repo is added in the children array.
Hope this resolves 🥂