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# frozen_string_literal: true
module USGeo
# Mapping of ZIP codes to currently active ZCTA's. The U.S. Postal Service
# maintains the list of active ZIP codes which can change as population moves
# around. New ZIP codes are created when a new area is developed and old ZIP
# are retired when an area is losing population. The Census Bureau updates
# the list of ZCTA's every 10 years.
#
# This mapping table allows looking up the current ZCTA for a ZIP code even
# if that ZIP code was retired and is no longer in the ZCTA table.
class ZctaMapping < BaseRecord
self.table_name = "us_geo_zcta_mappings"
self.primary_key = "zipcode"
belongs_to :zcta, foreign_key: :zcta_zipcode, inverse_of: :zcta_mappings
validates :zipcode, length: {is: 5}
validates :zcta_zipcode, length: {is: 5}
class << self
def load!(uri = nil)
location = data_uri(uri || "zcta_mappings.csv")
import! do
load_data_file(location) do |row|
load_record!(zipcode: row["ZIP Code"]) do |record|
record.zcta_zipcode = row["Active ZCTA5"]
end
end
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems