21 lines
516 B
Ruby
21 lines
516 B
Ruby
class Hydrant < ActiveRecord::Base
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validates_presence_of :lat, :lng
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belongs_to :user
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has_many :reminders
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def self.find_closest(lat, lng, limit=50)
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query = <<-SQL
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SELECT *, (3959 * ACOS(COS(RADIANS(?)) * COS(RADIANS(lat)) * COS(radians(lng) - RADIANS(?)) + SIN(RADIANS(?)) * SIN(RADIANS(lat)))) AS distance
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FROM hydrants
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ORDER BY distance
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LIMIT ?
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SQL
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Hydrant.find_by_sql([query, lat.to_f, lng.to_f, lat.to_f, limit.to_i])
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end
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def adopted?
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!user.nil?
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end
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end
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