class PG::BasicTypeRegistry::CoderMapsBundle
An instance of this class stores CoderMap
instances to be used for text and binary wire formats as well as encoder and decoder directions.
A PG::BasicTypeRegistry::CoderMapsBundle
instance retrieves all type definitions from the PostgreSQL server and matches them with the coder definitions of the global PG::BasicTypeRegistry
. It provides 4 separate CoderMap
instances for the combinations of the two formats and directions.
A PG::BasicTypeRegistry::CoderMapsBundle
instance can be used to initialize an instance of
by passing it instead of the connection object like so:
conn = PG::Connection.new maps = PG::BasicTypeRegistry::CoderMapsBundle.new(conn) conn.type_map_for_results = PG::BasicTypeMapForResults.new(maps)
Attributes
typenames_by_oid[R]
Public Class Methods
new(connection, registry: nil)
click to toggle source
# File lib/pg/basic_type_registry.rb, line 112 def initialize(connection, registry: nil) registry ||= DEFAULT_TYPE_REGISTRY result = connection.exec(<<-SQL).to_a SELECT t.oid, t.typname, t.typelem, t.typdelim, ti.proname AS typinput FROM pg_type as t JOIN pg_proc as ti ON ti.oid = t.typinput SQL init_maps(registry, result.freeze) freeze end
Public Instance Methods
each_format(direction)
click to toggle source
# File lib/pg/basic_type_registry.rb, line 141 def each_format(direction) @maps.map { |f| f[direction] } end
map_for(format, direction)
click to toggle source
# File lib/pg/basic_type_registry.rb, line 145 def map_for(format, direction) @maps[format][direction] end
Private Instance Methods
init_maps(registry, result)
click to toggle source
# File lib/pg/basic_type_registry.rb, line 125 def init_maps(registry, result) @maps = [ [0, :encoder, PG::TextEncoder::Array], [0, :decoder, PG::TextDecoder::Array], [1, :encoder, nil], [1, :decoder, nil], ].inject([]) do |h, (format, direction, arraycoder)| coders = registry.coders_for(format, direction) || {} h[format] ||= {} h[format][direction] = CoderMap.new(result, coders, format, arraycoder) h end.each{|h| h.freeze }.freeze @typenames_by_oid = result.inject({}){|h, t| h[t['oid'].to_i] = t['typname']; h }.freeze end