Method: Sequel::Plugins::SingleTableInheritance.configure

Defined in:
lib/sequel/plugins/single_table_inheritance.rb

.configure(model, key, opts = OPTS) ⇒ Object

Setup the necessary STI variables, see the module RDoc for SingleTableInheritance



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# File 'lib/sequel/plugins/single_table_inheritance.rb', line 82

def self.configure(model, key, opts=OPTS)
  model.instance_exec do
    @sti_key_array = nil
    @sti_key = key 
    @sti_dataset = dataset
    @sti_model_map = opts[:model_map] || lambda{|v| v if v && v != ''}
    @sti_key_map = if km = opts[:key_map]
      if km.is_a?(Hash)
        h = Hash.new do |h1,k| 
          unless k.is_a?(String)
            h1[k.to_s]
          else
            []
          end
        end
        km.each do |k,v|
          h[k.to_s] = [] unless h.key?(k.to_s)
          h[k.to_s].push( *Array(v) )
        end
        h
      else
        km
      end
    elsif sti_model_map.is_a?(Hash)
      h = Hash.new do |h1,k| 
        unless k.is_a?(String)
          h1[k.to_s]
        else
          []
        end
      end
      sti_model_map.each do |k,v|
        h[v.to_s] = [] unless h.key?(v.to_s)
        h[v.to_s] << k
      end
      h
    else
      lambda{|klass| klass.name.to_s}
    end
    @sti_key_chooser = opts[:key_chooser] || lambda{|inst| Array(inst.model.sti_key_map[inst.model]).last }

    @dataset = @dataset.with_row_proc(model.method(:sti_load))
  end
end