Module: ArrayKeys::DatasetExtensions

Defined in:
lib/sequel/array_keys.rb

Overview

The DatasetExtensions module provides extensions that modify a dataset to return Array tuples instead of Hash tuples.

Instance Method Summary collapse

Instance Method Details

#array_tuples_each(opts = nil, &block) ⇒ Object

Fetches a dataset’s records, converting each tuple into an array with keys.



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# File 'lib/sequel/array_keys.rb', line 195

def array_tuples_each(opts = nil, &block)
  fetch_rows(select_sql(opts)) {|h| block[Array.from_hash(h)]}
end

#array_tuples_update_each_method ⇒ Object

Provides the corresponding behavior to Sequel::Dataset#update_each_method, using array tuples.



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# File 'lib/sequel/array_keys.rb', line 201

def array_tuples_update_each_method
  # warning: ugly code generation ahead
  if @row_proc && @transform
    class << self
      def each(opts = nil, &block)
        if opts && opts[:naked]
          fetch_rows(select_sql(opts)) {|r| block[transform_load(Array.from_hash(r))]}
        else
          fetch_rows(select_sql(opts)) {|r| block[@row_proc[transform_load(Array.from_hash(r))]]}
        end
        self
      end
    end
  elsif @row_proc
    class << self
      def each(opts = nil, &block)
        if opts && opts[:naked]
          fetch_rows(select_sql(opts)) {|r| block[Array.from_hash(r)]}
        else
          fetch_rows(select_sql(opts)) {|r| block[@row_proc[Array.from_hash(r)]]}
        end
        self
      end
    end
  elsif @transform
    class << self
      def each(opts = nil, &block)
        fetch_rows(select_sql(opts)) {|r| block[transform_load(Array.from_hash(r))]}
        self
      end
    end
  else
    class << self
      def each(opts = nil, &block)
        fetch_rows(select_sql(opts)) {|r| block[Array.from_hash(r)]}
        self
      end
    end
  end
end