Class: Sequel::Dataset::PlaceholderLiteralizer::Recorder

Inherits:
Object
  • Object
show all
Defined in:
lib/sequel/dataset/placeholder_literalizer.rb

Overview

Records the offsets at which the placeholder arguments are used in the SQL query.

Instance Method Summary collapse

Instance Method Details

#arg(v = (no_arg_given = true; @argn+=1)) ⇒ Object

Return an Argument with the specified position, or the next position. In general you shouldn’t mix calls with an argument and calls without an argument for the same receiver.



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# File 'lib/sequel/dataset/placeholder_literalizer.rb', line 87

def arg(v=(no_arg_given = true; @argn+=1))
  unless no_arg_given
    @argn = v if @argn < v
  end
  Argument.new(self, v)
end

#loader(pl, dataset, &block) ⇒ Object

Yields the receiver and the dataset to the block, which should call #arg on the receiver for each placeholder argument, and return the dataset that you want to load.



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# File 'lib/sequel/dataset/placeholder_literalizer.rb', line 80

def loader(pl, dataset, &block)
  pl.new(*process(dataset, &block))
end

#use(sql, arg, transformer) ⇒ Object

Record the offset at which the argument is used in the SQL query, and any transforming block.



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# File 'lib/sequel/dataset/placeholder_literalizer.rb', line 96

def use(sql, arg, transformer)
  @args << [sql, sql.length, arg, transformer]
end