Rails Admin Mongoid Geospatial Field:

Adds to RailsAdmin support for setting geospatial information with Google Maps.

Installation

To enable this gem, add the following to your Gemfile:

gem "rails_admin_mongoid_geospatial_field", :github => "sudosu/rails_admin_mongoid_geospatial_field"

And then execute:

$ bundle

Usage

In your model location field must be an Array:

class Person
  include Mongoid::Document
  
  field :location, :type => Array  # [lat,lng]
  
  index( { location: '2d' }, { min: -180, max: 180 }) # create an special index 
  
  before_save :fix_location, if: :location_changed? # lat and lng must be in float format
  
  def fix_location
    self.location = self.location.map(&:to_f)
  end
end

Then, add in your config/initializers/rails_admin.rb initializer:

RailsAdmin.config do |config|
  config.model Person do
    edit do
      field :location, :geospatial
    end
  end
end

Create indexes in command prompt:

rake db:mongoid:create_indexes

Configuration

• google_api_key - if you use a Google Maps API Key, it can be specified here.
• default_latitude - the latitude to center the map shown on if the latitude is blank. Defaults to 48.9226, the latitude of Ivano-Frankivsk, Ukraine
• default_longitude - the longitude used if the longitude is blank. Defaults to 24.7111, the longitude of Ivano-Frankivsk, Ukraine.
• default_zoom_level - initial map zoom level. Defaults to 8
• map_width - map width in px, eg: '400'
• map_height - map height in px

If your model have an additional address fields (city, country, state), you can configure field for geocoding them:

• address_field - the name of the address field. Defaults to :address
• city_field - the name of the city field. Defaults to :city
• state_field - the name of the state field. Defaults to :state
• country_field - the name of the country field. Defaults to :country

This works perfectly even with associations.

Example:

RailsAdmin.config do |config|
  config.model Point do
    edit do
      field :location, :geospatial do
        address_field :address
        google_api_key "a1b2c3d4e5f6deadbeef"
        default_latitude 50.4  # Kiev, Ukraine
        default_longitude 30.5
        default_zoom_level 15
      end
    end
  end
end

License

Licensed under the MIT license.

Copyright (C) 2014 Oleg Popadyuk

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.