Method: Array#sql_string_join

Defined in:
lib/sequel/core_sql.rb

#sql_string_join(joiner = nil) ⇒ Object

Return a Sequel::SQL::BooleanExpression representing an SQL string made up of the concatenation of this array’s elements. If an argument is passed it is used in between each element of the array in the SQL concatenation.

[:a].sql_string_join # SQL: a
[:a, :b].sql_string_join # SQL: a || b
[:a, 'b'].sql_string_join # SQL: a || 'b'
['a', :b].sql_string_join(' ') # SQL: 'a' || ' ' || b



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# File 'lib/sequel/core_sql.rb', line 92

def sql_string_join(joiner=nil)
  if joiner
    args = zip([joiner]*length).flatten
    args.pop
  else
    args = self
  end
  args = args.collect{|a| [Symbol, ::Sequel::SQL::Expression, ::Sequel::LiteralString, TrueClass, FalseClass, NilClass].any?{|c| a.is_a?(c)} ? a : a.to_s}
  ::Sequel::SQL::StringExpression.new(:'||', *args)
end