Я пишу приложение, в которое пытаюсь интегрировать некоторые общие функции геолокации, включая сохранение некоторых координат широты и долготы в качестве точки в базе данных. Цель этого состоит в том, чтобы позволить пользователю либо использовать свое местоположение (предоставленное устройством), либо маркер карты Google для выбора своих координат. Мне удалось получить координаты с карты или устройства, однако теперь у меня возникли проблемы с созданием из них точки для сохранения в БД.
Я прочитал документацию и попытался добавить этот код в мой инициализатор:
инициализатор /rgeo.rb
require 'rgeo-activerecord'
RGeo::ActiveRecord::SpatialFactoryStore.instance.tap do |config|
# By default, use the GEOS implementation for spatial columns.
config.default = RGeo::Geos.factory_generator
# But use a geographic implementation for point columns.
config.register(RGeo::Geographic.spherical_factory(srid: 4326), geo_type: "point")
end
Gemfile:
gem 'activerecord-postgis-adapter'
gem 'rgeo'
gem 'rgeo-activerecord'
Миграция:
def change
add_column :monuments, :grid_ref, :point, geographic: true
end
Я получаю эту ошибку в консоли rails при попытке создать точку:
irb(main):004:0> m.grid_ref = "POINT(-122.193963 47.675086)"
ArgumentError: invalid value for Float(): "POINT(-122.193963 47.675086)"
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/postgresql/oid/point.rb:20:in `Float'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/postgresql/oid/point.rb:20:in `block in type_cast'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/postgresql/oid/point.rb:20:in `map'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/postgresql/oid/point.rb:20:in `type_cast'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/postgresql/oid/point.rb:18:in `type_cast'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/type/value.rb:23:in `type_cast_from_database'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/type/mutable.rb:5:in `type_cast_from_user'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute.rb:100:in `type_cast'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute.rb:42:in `original_value'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute.rb:37:in `value'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute.rb:46:in `value_for_database'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute_methods/dirty.rb:164:in `store_original_raw_attribute'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute_methods/dirty.rb:93:in `write_attribute'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/attribute_methods.rb:50:in `__temp__76279646f5275666'
from (irb):4
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/console.rb:110:in `start'
... 9 levels...
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `block in load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/commands/rails.rb:6:in `call'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/command_wrapper.rb:38:in `call'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:185:in `block in serve'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:156:in `fork'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:156:in `serve'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:131:in `block in run'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:125:in `loop'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application.rb:125:in `run'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.6.4/lib/spring/application/boot.rb:18:in `<top (required)>'
from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Я выбрал этот подход после прочтения этой демонстрации, которая предполагает, что модель неявно понимает строку WKT. , внутренне преобразовывая его в "точечный" объект.