Method: Sequel::Dataset#first_source_alias

Defined in:
lib/sequel/dataset/misc.rb

#first_source_alias ⇒ Object

The first source (primary table) for this dataset. If the dataset doesn’t have a table, raises an Error. If the table is aliased, returns the aliased name.

DB[:table].first_source_alias
# => :table

DB[Sequel[:table].as(:t)].first_source_alias
# => :t



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# File 'lib/sequel/dataset/misc.rb', line 103

def first_source_alias
  source = @opts[:from]
  if source.nil? || source.empty?
    raise Error, 'No source specified for query'
  end
  case s = source.first
  when SQL::AliasedExpression
    s.alias
  when Symbol
    _, _, aliaz = split_symbol(s)
    aliaz ? aliaz.to_sym : s
  else
    s
  end
end