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# frozen_string_literal: true
module USGeo
# Division of very large metropolitian areas into groups of approximately 2.5 million people.
class MetropolitanDivision < BaseRecord
include Population
include Area
self.primary_key = "geoid"
has_many :counties, -> { not_removed }, foreign_key: :metropolitan_division_geoid, inverse_of: :metropolitan_division
belongs_to :core_based_statistical_area, foreign_key: :cbsa_geoid, optional: true, inverse_of: :metropolitan_divisions
validates :geoid, length: {is: 5}
validates :name, presence: true, length: {maximum: 60}, uniqueness: true
validates :land_area, numericality: true, presence: true
validates :water_area, numericality: true, presence: true
validates :population, numericality: {only_integer: true}, presence: true
validates :housing_units, numericality: {only_integer: true}, presence: true
# @!attribute geoid
# @return [String] 5-digit code for the metropolitan division.
# @!attribute name
# @return [String] Name of the metropolitan division.
# @!method combined_statistical_area
# @return [CombinedStatisticalArea, nil] Combined statistical area that the metropolitan division is a part of.
delegate :combined_statistical_area, to: :core_based_statistical_area, allow_nil: true
class << self
def load!(uri = nil)
location = data_uri(uri || "metropolitan_divisions.csv")
import! do
load_data_file(location) do |row|
load_record!(geoid: row["GEOID"]) do |record|
record.name = row["Name"]
record.cbsa_geoid = row["CBSA"]
record.population = row["Population"]
record.housing_units = row["Housing Units"]
record.land_area = row["Land Area"]
record.water_area = row["Water Area"]
end
end
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems