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