Module: AR::Sequence::SchemaDumper

Defined in:
lib/ar/sequence/schema_dumper.rb

Instance Method Summary collapse

Instance Method Details

#header(stream) ⇒ Object 



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# File 'lib/ar/sequence/schema_dumper.rb', line 6

def header(stream)
  super
  sequences(stream)
end

#retrieve_search_path ⇒ Object 



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# File 'lib/ar/sequence/schema_dumper.rb', line 11

def retrieve_search_path
  user = @connection.select_one("select user").values.first

  @connection
    .select_one("show search_path")
    .values
    .first
    .split(", ")
    .map {|path| path == '"$user"' ? user : path }
end

#sequences(stream) ⇒ Object 



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# File 'lib/ar/sequence/schema_dumper.rb', line 22

def sequences(stream)
  sequences = @connection.check_sequences
  search_path = retrieve_search_path

  return if sequences.empty?

  sequences.each do |seq|
    schema = seq["sequence_schema"]

    sequence_full_name = [
      search_path.include?(schema) ? nil : schema,
      seq["sequence_name"]
    ].compact.join(".")

    next unless @connection.custom_sequence?(sequence_full_name)

    start_value = seq["start_value"]
    increment = seq["increment"]

    options = []

    if start_value && Integer(start_value) != 1
      options << "start: #{start_value}"
    end

    if increment && Integer(increment) != 1
      options << "increment: #{increment}"
    end

    statement = [
      "create_sequence",
      sequence_full_name.inspect
    ].join(" ")

    if options.any?
      statement << (options.any? ? ", #{options.join(', ')}" : "")
    end

    stream.puts "  #{statement}"
  end

  stream.puts
end