ruby on rails - NoMethodError using activerecord_postgis_adapter -


apologies if newbie question, have tried solve couple of days 0 luck.

i tried installing activerecord-postgis-adapter per readme unable create model instance keep getting error mentioned below on code pasted below that.

update

nomethoderror: undefined method `point' nil:nilclass

here different files like:

location.rb (the model, updated code)

# == schema information # # table name: locations # #  id             :integer          not null, primary key #  locatable_id   :integer #  locatable_type :string #  created_at     :datetime         not null #  updated_at     :datetime         not null #  coordinates    :geography({:srid point, 4326 #  class location < activerecord::base      #self.rgeo_factory_generator = rgeo::geos.factory_generator     #set_rgeo_factory_for_column(:coordinates,      #   rgeo::geographic.spherical_factory(:srid => 4326) )      locfactory = rgeo::activerecord::spatialfactorystore.instance.factory(:geo_type => 'point')      belongs_to  :locatable,         polymorphic: true      validates   :locatable, presence: true      attr_accessor   :longitude, :latitude  end

gemfile

gem 'rgeo' gem 'rgeo-activerecord' gem 'activerecord-postgis-adapter'

config/application.rb

require 'rails/all' #require 'active_record/connection_adapters/postgis_adapter/railtie' #require "#{rails.root}/lib/rgeo"

config/database.yml

development: <<: *default database: geoproject-api_development adapter: postgis schema_search_path: "public,postgis"

after adding record when try retrieve it, following: 

irb(main):003:0> lala = location.first location load (1.6ms) select "locations".* "locations" order "locations"."id" asc limit 1 (object doesn't support #inspect)  irb(main):004:0> lala.class.name => "location"  irb(main):005:0> puts lala #<location:0x007fdfd4bb2860> => nil irb(main):006:0> puts lala.inspect nomethoderror: undefined method point' nil:nilclass

wondering why or how can fix it? more specifically, why nilclass , why #inspect not being found?

from schema.rb

 create_table "locations", force: :cascade |t|     t.integer   "locatable_id"     t.string    "locatable_type"     t.datetime  "created_at",                                                              null: false     t.datetime  "updated_at",                                                              null: false     t.geography "coordinates",    limit: {:srid=>4326, :type=>"point", :geographic=>true}   end

i using rails 4.2.1.

any appreciated!

as of version 3.0.0 can't set column specific geo factory properties. , method set_rgeo_factory_for_column removed , deprecated. can, configure rgeo factory application wide. example in initializer.

rgeo::activerecord::spatialfactorystore.instance.tap |config|   # default, use geos implementation spatial columns.   config.default = rgeo::geos.factory_generator    # use geographic implementation point columns.   config.register(rgeo::geographic.spherical_factory(srid: 4326), geo_type: "point") end

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