PostgresExt::Postgis

Installation

Add this line to your application's Gemfile:

gem 'postgres_ext-postgis'

And then execute:

$ bundle

Or install it yourself as:

$ gem install postgres_ext-postgis

Usage

Just require 'postgres_ext/postgis' and use ActiveRecord as you normally would! postgres\ext extends ActiveRecord's data type handling and query methods in both Arel and ActiveRecord.

Migrations

Adding a geomtry column to your table is simple! You can create a plain geometry column, or specify your spatial type and projection:

create_table :districts do |t|
  t.geometry :location
  t.geometry :district_boundries, spatial_type: :multipolygon, srid: 4326
end

Type Casting

PostGIS geometry types are converted to RGeo objects. You can set your PostGIS types in ActiveRecord using either the Extended Well-Known Binary (WKB) or Extended Well-Known Text (WKT) representation:

user.location = 'SRID=4623;POINT(1 1)'

Querying

Contains

Using the contains querying interface from postgres_ext that arrays utilize, we can query if geometry column contains the specified object

District.where.contains(district_boundries: user.location)

Authors

• Dan McClain

We are very thankful for the many contributors

Versioning

This gem follows Semantic Versioning

Want to help?

Please do! We are always looking to improve this gem. Please see our Contribution Guidelines on how to properly submit issues and pull requests.

Legal

DockYard, Inc. © 2014

@dockyard

Licensed under the MIT license