使用Ecto 2.0.0-rc.0并执行ecto.migrate时出现奇怪的错误

Question

今天,我经常尝试在我的Phoenix应用程序中混合使用ecto.migrate,并且出乎意料地发现了以下错误:

warning: could not find repositories for application :adah.

You can avoid this warning by passing the -r flag or by setting the
repositories managed by this application in your config files:

  config :adah, ecto_repos: [...]

The configuration may be an empty list if it does not define any repo.

** (Protocol.UndefinedError) protocol Enumerable not implemented for :ok
(elixir) lib/enum.ex:1: Enumerable.impl_for!/1
(elixir) lib/enum.ex:116: Enumerable.reduce/3
(elixir) lib/enum.ex:1486: Enum.reduce/3
(elixir) lib/enum.ex:609: Enum.each/2
(mix) lib/mix/cli.ex:58: Mix.CLI.run_task/2

我的代表是:

phoenix_ecto: 3.0.0-rc.0
ecto: 2.0.0-rc.0
...

我的配置文件包含以下行:

dev.ex:

# Configure your database
 config :adah, Adah.Repo,
   adapter: Ecto.Adapters.Postgres,
   username: "postgres",
   password: "postgres",
   database: "adah_dev",
   hostname: "localhost",
   pool_size: 10

test.ex: 

# Configure your database
 config :adah, Adah.Repo,
 adapter: Ecto.Adapters.Postgres,
 username: System.get_env("POSTGRES_USER") || "postgres",
 password: System.get_env("POSTGRES_PASSWORD") || "postgres",
 database: System.get_env("POSTGRES_DB") || "adah_test",
 hostname: System.get_env("POSTGRES_HOST") || "localhost",
 pool: Ecto.Adapters.SQL.Sandbox

并且我在开发环境中运行测试或提供页面时没有这样的错误,只有当我运行mix ecto.migrate时.

那么......我应该将什么添加到配置文件中或传入-r标志？

更新:我相信有一个错误,它对应于phoenix-3.0.0-rc.0或ecto-2.0.0-rc.0包,因为当我使用{:ecto,"== 2.0.0-beta. 2",:phoenix_ecto,"3.0.0-beta.2"}开关,一切都按预期工作.

Answer 1

将其添加到config/config.ex

config :adah, :ecto_repos, [Adah.Repo]