Class: G2R::RDBMS::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/graph2relational/rdbms-connection.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/graph2relational/rdbms-connection.rb', line 5

def initialize(options)
  # sequel
  @db = Sequel.connect(options)
end

Instance Method Details

#create_table(table) ⇒ Object 



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# File 'lib/graph2relational/rdbms-connection.rb', line 10

def create_table(table)
  @db.create_table! table.name.to_sym do

    table.columns.each do |column|
      # primary key
      if column.primary_key?
        primary_key column.name.to_sym
      # foreign key
      elsif column.foreign_key?
        foreign_key column.name.to_sym, column.target_table.to_sym
        index column.name.to_sym
      # common column
      else
        String column.name.to_sym
      end
    end
  end
end

#insert_data(table) ⇒ Object 



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# File 'lib/graph2relational/rdbms-connection.rb', line 29

def insert_data(table)
   @db.transaction do
     table.data.each do |row|
       @db[table.name.to_sym].insert(row)
     end
   end
end