PostgreSQL range types for Ecto.
PgRanges provides a simple wrapper around Postgrex.Range so that you can
create scheams with range type fields and use the native range type in
migrations.
defmodule MyApp.Employee do
use Ecto.Schema
alias PgRanges.DateRange
schema "employees" do
field :name, :string
field :employed_dates, DateRange
end
end
defmodule MyApp.Repo.Migrations.CreateEmployees do
use Ecto.Migration
def change do
create table(:employees) do
add :name, :string
add :employed_dates, :daterange
end
end
endWhen used in composing queries, you must cast to the PgRange type.
import Ecto.Query
alias PgRanges.DateRange
alias MyApp.Repo
range = DateRange.new(~D[2018-11-01], ~D[2019-01-01])
Repo.all(
from e in Employee,
where: fragment("? @> ?", e.employed_dates, type(^range, DateRange))
)The package can be installed by adding pg_ranges to your list of dependencies
in mix.exs:
def deps do
[
{:pg_ranges, "~> 0.1.0"}
]
end