[英]Geokit-rails fresh setup, Could not find table 'locations' Rails 5
[英]Geokit-Rails: polymorphic location query
该位置具有:lat和:lng与“ geokit-rails”配合使用,我正在运行Rails 4。
是否可以查询在指定位置范围内具有轨道的不同集合?
class Location < ActiveRecord::Base
belongs_to :locatable, polymorphic: true
acts_as_mappable
end
class Tracks < ActiveRecord::Base
has_one :location, as: :locatable
belongs_to :collection
end
class Collection < ActiveRecord::Base
belongs_to :user
has_many :tracks
end
要将多态与grokit-rails一起使用,您必须通过::location将acts_as_mappable添加到Tracks模型中:
class Tracks < ActiveRecord::Base
has_one :location, as: :locatable
acts_as_mappable through: :location
belongs_to :collection
end
查询必须是:
@collection.tracks.joins(:location).within(distance, :origin => @origin)
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