Class: ActiveRecord::ConnectionAdapters::PostGIS::OID::Spatial

Inherits:
Type::Value
  • Object
show all
Defined in:
lib/active_record/connection_adapters/postgis/oid/spatial.rb

Overview

OID used to represent geometry/geography database types and attributes.

Accepts ‘geo_type`, `srid`, `has_z`, `has_m`, and `geographic` as parameters. Responsible for parsing sql_types returned from the database and WKT features.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(geo_type: "geometry", srid: 0, has_z: false, has_m: false, geographic: false) ⇒ Spatial

Returns a new instance of Spatial.



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 12

def initialize(geo_type: "geometry", srid: 0, has_z: false, has_m: false, geographic: false)
  super()
  @geographic = geographic.freeze
  @factory_attrs = {
    geo_type: geo_type.underscore.freeze,
    has_m: has_m.freeze,
    has_z: has_z.freeze,
    srid: srid.freeze,
    sql_type: type.to_s.freeze
  }.freeze
end

Class Method Details

.parse_sql_type(sql_type) ⇒ Object

sql_type: geometry, geometry(Point), geometry(Point,4326), …

returns [geo_type, srid, has_z, has_m]

geo_type: geography, geometry, point, line_string, polygon, ...
srid:     1234
has_z:    false
has_m:    false



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 32

def self.parse_sql_type(sql_type)
  geo_type = nil
  srid = 0
  has_z = false
  has_m = false

  if sql_type =~ /(geography|geometry)\((.*)\)$/i
    # geometry(Point)
    # geometry(Point,4326)
    params = Regexp.last_match(2).split(",")
    if params.first =~ /([a-z]+[^zm])(z?)(m?)/i
      has_z = Regexp.last_match(2).length > 0
      has_m = Regexp.last_match(3).length > 0
      geo_type = Regexp.last_match(1)
    end
    if params.last =~ /(\d+)/
      srid = Regexp.last_match(1).to_i
    end
  else
    # geometry
    # otherType(a,b)
    geo_type = sql_type
  end
  geographic = sql_type.match?(/geography/)

  [geo_type, srid, has_z, has_m, geographic]
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 87

def ==(other)
  super &&
    @geographic == other.geographic &&
    @factory_attrs == other.factory_attrs
end

#hash ⇒ Object 



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 94

def hash
  super ^ [@geographic, @factory_attrs].hash
end

#serialize(value) ⇒ Object

support setting an RGeo object or a WKT string



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 75

def serialize(value)
  return if value.nil?
  geo_value = cast_value(value)

  # TODO - only valid types should be allowed
  # e.g. linestring is not valid for point column
  # raise "maybe should raise" unless RGeo::Feature::Geometry.check_type(geo_value)

  RGeo::WKRep::WKBGenerator.new(hex_format: true, type_format: :ewkb, emit_ewkb_srid: true)
                           .generate(geo_value)
end

#spatial? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 66

def spatial?
  true
end

#spatial_factory ⇒ Object 



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 60

def spatial_factory
  RGeo::ActiveRecord::SpatialFactoryStore.instance.factory(
    factory_attrs
  )
end

#type ⇒ Object 



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# File 'lib/active_record/connection_adapters/postgis/oid/spatial.rb', line 70

def type
  @geographic ? :geography : :geometry
end