Class: Baza::Driver::Mysql::Sql::CreateIndexes

Inherits:
Object
  • Object
show all
Defined in:
lib/baza/driver/mysql/sql/create_indexes.rb

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ CreateIndexes

Returns a new instance of CreateIndexes.



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# File 'lib/baza/driver/mysql/sql/create_indexes.rb', line 2

def initialize(args)
  @create = args[:create]
  @indexes = args.fetch(:indexes)
  @on_table = args[:on_table]
  @table_name = args.fetch(:table_name)
end

Instance Method Details

#sql ⇒ Object 



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# File 'lib/baza/driver/mysql/sql/create_indexes.rb', line 9

def sql
  sql = ""
  first = true

  @indexes.each do |index_data|
    sql << "CREATE" if @create || @create.nil?

    if index_data.is_a?(String) || index_data.is_a?(Symbol)
      index_data = {name: index_data, columns: [index_data]}
    end

    raise "No name was given: '#{index_data}'." if !index_data.key?(:name) || index_data[:name].to_s.strip.empty?
    raise "No columns was given on index: '#{index_data.fetch(:name)}'." if !index_data[:columns] || index_data[:columns].empty?

    if first
      first = false
    else
      sql << ", "
    end

    sql << " UNIQUE" if index_data[:unique]
    sql << " INDEX #{Baza::Driver::Mysql.quote_index(index_data.fetch(:name))}"

    if @on_table || @on_table.nil?
      sql << " ON #{Baza::Driver::Mysql.quote_table(@table_name)}"
    end

    sql << " ("

    first = true
    index_data[:columns].each do |col_name|
      sql << ", " unless first
      first = false if first

      sql << Baza::Driver::Mysql.quote_column(col_name)
    end

    sql << ")"
  end

  [sql]
end