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Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.
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lib/mix/tasks/phoenix.gen.model.ex
defmodule Mix.Tasks.Phoenix.Gen.Model do
use Mix.Task
@shortdoc "Generates an Ecto model"
@moduledoc """
Generates an Ecto model in your Phoenix application.
mix phoenix.gen.model User users name:string age:integer
The first argument is the module name followed by its plural
name (used for the schema).
The generated model will contain:
* a model in web/models
* a migration file for the repository
## Attributes
The resource fields are given using `name:type` syntax
where type are the types supported by Ecto. Ommitting
the type makes it default to `:string`:
mix phoenix.gen.model User users name age:integer
Furthermore an array type can also be given if it is
supported by your database, although it requires the
type of the underlying array element to be given too:
mix phoenix.gen.model User users nicknames:array:string
## Namespaced resources
Resources can be namespaced, for such, it is just necessary
to namespace the first argument of the generator:
mix phoenix.gen.model Admin.User users name:string age:integer
"""
def run(args) do
{_opts, parsed, _} = OptionParser.parse(args, switches: [])
[singular, plural | attrs] = validate_args!(parsed)
attrs = Mix.Phoenix.attrs(attrs)
binding = Mix.Phoenix.inflect(singular)
path = binding[:path]
migration = String.replace(path, "/", "_")
binding = binding ++
[attrs: attrs, plural: plural, types: types(attrs),
defaults: defaults(attrs), params: Mix.Phoenix.params(attrs)]
Mix.Phoenix.copy_from source_dir, "", binding, [
{:eex, "migration.exs", "priv/repo/migrations/#{timestamp()}_create_#{migration}.exs"},
{:eex, "model.ex", "web/models/#{path}.ex"},
{:eex, "model_test.exs", "test/models/#{path}_test.exs"},
]
end
defp validate_args!([_, plural | _] = args) do
if String.contains?(plural, ":") do
raise_with_help
else
args
end
end
defp validate_args!(_) do
raise_with_help
end
defp raise_with_help do
Mix.raise """
mix phoenix.gen.model expects both singular and plural names
of the generated resource followed by any number of attributes:
mix phoenix.gen.model User users name:string
"""
end
defp timestamp do
{{y, m, d}, {hh, mm, ss}} = :calendar.universal_time()
"#{y}#{pad(m)}#{pad(d)}#{pad(hh)}#{pad(mm)}#{pad(ss)}"
end
defp pad(i) when i < 10, do: << ?0, ?0 + i >>
defp pad(i), do: to_string(i)
defp types(attrs) do
Enum.into attrs, %{}, fn
{k, {c, v}} -> {k, {c, value_to_type(v)}}
{k, v} -> {k, value_to_type(v)}
end
end
defp defaults(attrs) do
Enum.into attrs, %{}, fn
{k, :boolean} -> {k, ", default: false"}
{k, _} -> {k, ""}
end
end
defp value_to_type(:text), do: :string
defp value_to_type(:uuid), do: Ecto.UUID
defp value_to_type(:date), do: Ecto.Date
defp value_to_type(:time), do: Ecto.Time
defp value_to_type(:datetime), do: Ecto.DateTime
defp value_to_type(v) do
if Code.ensure_loaded?(Ecto.Type) and not Ecto.Type.primitive?(v) do
Mix.raise "Unknown type `#{v}` given to generator"
else
v
end
end
defp source_dir do
Application.app_dir(:phoenix, "priv/templates/model")
end
end