How to Disable Ecto in Elixir Phoenix After Project Creation

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If you have created an Elixir Phoenix project without the --no-ecto flag, you will see a lot of warnings and errors regarding databases and ecto down the line.

Here’s how you can disable it.

Go to lib/myapp/application.ex, comment out the following lines:

children = [
  # Start the Ecto repository
  # Myapp.Repo,
  ...
]

Then look for config/dev.exs and comment out the following lines:

# Configure your database
# config :myapp, Myapp.Repo,
#   username: "",
#   password: "",
#   database: "myapp_dev",
#   hostname: "localhost",
#   show_sensitive_data_on_connection_error: true,
#   pool_size: 10

And to disable for production deployment, go to config/prod.secret.exs, comment out the following lines:

# database_url =
#   System.get_env("DATABASE_URL") ||
#     raise """
#     environment variable DATABASE_URL is missing.
#     For example: ecto://USER:PASS@HOST/DATABASE
#     """
# config :krypto, Krypto.Repo,
#   # ssl: true,
#   url: database_url,
#   pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")

That’s all! The errors should stop appearing.

And if you need to re-enable Ecto again, just uncomment all these lines!