Module: DbMod::Statements::Configuration::Single::Row

Defined in:
lib/db_mod/statements/configuration/single/row.rb

Overview

Wrapper for a statement or prepared method that returns only the first row of the result set as a hash, to save manual unboxing. Returns nil if the query returns no results.

def_statement(:a, 'SELECT a, b FROM foo').single(:row)

def do_stuff
  a # => { 'a' => '1', 'b' => '2'
end

Class Method Summary collapse

Class Method Details

.call(results) ⇒ Hash<String,String>?

Enables this module to be passed to DbMod::Statements::Configuration.attach_result_processor as the wrapper function, where it will return the first row of the result set, or nil if the result set is empty.

Parameters:

  • results (Object) —

    SQL result set

Returns:

  • (Hash<String,String>, nil) —

    the first row of the SQL result set returned by the query



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# File 'lib/db_mod/statements/configuration/single/row.rb', line 24

def self.call(results)
  return nil unless results.any?

  results[0]
end