Rails Admin Map Field

rails_admin_map_field is a gem that works with sferik's rails_admin (https://github.com/sferik/rails_admin) to provide an easy to use Google Maps interface for displaying and setting geographic co-ordinates in a model.

Where a latitude and longitude is set on the model, it is indicated by a marker shown on a Google map centered at the marker. The administrator is expected to also store address, city, and state fields. As these fields are filled in, the Maps API is used to geocode the address in order to determine the latitude and longitude of the map marker, which is updated on the fly.

Usage

rails_admin_map_field expects that the model will have two attributes, one for latitude and one for longitude of the point represented. To enable rails_admin_map_field, add the following to your Gemfile:

gem "rails_admin_map_field", :git => "git://github.com/trademobile/rails_admin_map_field.git"

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

RailsAdmin.config do |config|
  config.model User do
    edit do
      field :latitude, :map
    end
  end
end

Note: The field which is set as a map-type field must be the latitude field, not the longitude. By default, rails_admin_map_field will guess that the longitude field is called "longitude".

Configuration

For different configurations, rails_admin_map_field can be configured with the following:

• longitude_field - the name of the longitude field that forms the the co-ordinate with the latitude field specified. Defaults to "longitude"
• 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"
• 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 field is blank. Defaults to 51.5, the latitude of London, UK.
• default_longitude - the longitude used if the longitude field is blank. Defaults to -0.126, the longitude of London, UK.

A more complicated configuration example:

RailsAdmin.config do |config|
  config.model Point do
    edit do
      field :lat, :map do
        longitude_field :lon
        google_api_key "a1b2c3d4e5f6deadbeef"
        default_latitude -34.0  # Sydney, Australia
        default_longitude 151.0
      end
    end
  end
end

LICENSE

rails_admin_map_field is licensed under the MIT license.

Copyright (C) 2011 by Jason Langenauer and Jules Laplace

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.