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ecto
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0.11.0
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0.1.0
A toolkit for data mapping and language integrated query for Elixir
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lib/mix/tasks/ecto.drop.ex
defmodule Mix.Tasks.Ecto.Drop do
use Mix.Task
import Mix.Ecto
@shortdoc "Drops the repository storage"
@default_opts [force: false, force_drop: false]
@aliases [
f: :force,
q: :quiet,
r: :repo
]
@switches [
force: :boolean,
force_drop: :boolean,
quiet: :boolean,
repo: [:keep, :string],
no_compile: :boolean,
no_deps_check: :boolean
]
@moduledoc """
Drop the storage for the given repository.
The repositories to drop are the ones specified under the
`:ecto_repos` option in the current app configuration. However,
if the `-r` option is given, it replaces the `:ecto_repos` config.
Since Ecto tasks can only be executed once, if you need to drop
multiple repositories, set `:ecto_repos` accordingly or pass the `-r`
flag multiple times.
## Examples
$ mix ecto.drop
$ mix ecto.drop -r Custom.Repo
## Command line options
* `-r`, `--repo` - the repo to drop
* `-q`, `--quiet` - run the command quietly
* `-f`, `--force` - do not ask for confirmation when dropping the database.
Configuration is asked only when `:start_permanent` is set to true
(typically in production)
* `--force-drop` - force the database to be dropped even
if it has connections to it (requires PostgreSQL 13+)
* `--no-compile` - do not compile before dropping
* `--no-deps-check` - do not compile before dropping
"""
@impl true
def run(args) do
repos = parse_repo(args)
{opts, _} = OptionParser.parse!(args, strict: @switches, aliases: @aliases)
opts = Keyword.merge(@default_opts, opts)
Enum.each(repos, fn repo ->
ensure_repo(repo, args)
ensure_implements(
repo.__adapter__(),
Ecto.Adapter.Storage,
"drop storage for #{inspect(repo)}"
)
if skip_safety_warnings?() or
opts[:force] or
Mix.shell().yes?(
"Are you sure you want to drop the database for repo #{inspect(repo)}?"
) do
drop_database(repo, opts)
end
end)
end
defp skip_safety_warnings? do
Mix.Project.config()[:start_permanent] != true
end
defp drop_database(repo, opts) do
config =
opts
|> Keyword.take([:force_drop])
|> Keyword.merge(repo.config())
case repo.__adapter__().storage_down(config) do
:ok ->
unless opts[:quiet] do
Mix.shell().info("The database for #{inspect(repo)} has been dropped")
end
{:error, :already_down} ->
unless opts[:quiet] do
Mix.shell().info("The database for #{inspect(repo)} has already been dropped")
end
{:error, term} when is_binary(term) ->
Mix.raise("The database for #{inspect(repo)} couldn't be dropped: #{term}")
{:error, term} ->
Mix.raise("The database for #{inspect(repo)} couldn't be dropped: #{inspect(term)}")
end
end
end