PostGIS extension for Postgrex. Supports Geometry and Geography data types.

Examples

Create a new Postgrex Types module:

Postgrex.Types.define(MyApp.PostgresTypes, [Geo.PostGIS.Extension], [])copy

If using with Ecto, you may want something like thing instead:

Postgrex.Types.define(MyApp.PostgresTypes,
              [Geo.PostGIS.Extension] ++ Ecto.Adapters.Postgres.extensions(),
              json: Poison)

opts = [hostname: "localhost", username: "postgres", database: "geo_postgrex_test",
types: MyApp.PostgresTypes ]

[hostname: "localhost", username: "postgres", database: "geo_postgrex_test",
  types: MyApp.PostgresTypes]

{:ok, pid} = Postgrex.Connection.start_link(opts)
{:ok, #PID<0.115.0>}

geo = %Geo.Point{coordinates: {30, -90}, srid: 4326}
%Geo.Point{coordinates: {30, -90}, srid: 4326}

{:ok, _} = Postgrex.Connection.query(pid, "CREATE TABLE point_test (id int, geom geometry(Point, 4326))")
{:ok, %Postgrex.Result{columns: nil, command: :create_table, num_rows: 0, rows: nil}}

{:ok, _} = Postgrex.Connection.query(pid, "INSERT INTO point_test VALUES ($1, $2)", [42, geo])
{:ok, %Postgrex.Result{columns: nil, command: :insert, num_rows: 1, rows: nil}}

Postgrex.Connection.query(pid, "SELECT * FROM point_test")
{:ok, %Postgrex.Result{columns: ["id", "geom"], command: :select, num_rows: 1,
rows: [{42, %Geo.Point{coordinates: {30.0, -90.0}, srid: 4326}}]}}copy