Module: OQGraph::EdgeClassMethods

Defined in:
lib/oqgraph/edge_class_methods.rb

Instance Method Summary collapse

Instance Method Details

#create_graph_table ⇒ Object

Creates the OQGraph table for the edge model. This table exists in memory only and needs to be updated on every database restart.



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# File 'lib/oqgraph/edge_class_methods.rb', line 8

def create_graph_table
  connection.execute <<-EOS
  CREATE TABLE IF NOT EXISTS #{oqgraph_table_name} (
      latch   SMALLINT  UNSIGNED NULL,
      origid  BIGINT    UNSIGNED NULL,
      destid  BIGINT    UNSIGNED NULL,
      weight  DOUBLE    NULL,
      seq     BIGINT    UNSIGNED NULL,
      linkid  BIGINT    UNSIGNED NULL,
      KEY (latch, origid, destid) USING HASH,
      KEY (latch, destid, origid) USING HASH
    ) ENGINE=OQGRAPH;
  EOS
  
  # if the DB server has restarted then there will be no records in the oqgraph table.
  update_graph_table
end

#node_table ⇒ Object 



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# File 'lib/oqgraph/edge_class_methods.rb', line 30

def node_table
  node_class.table_name
end

#update_graph_table ⇒ Object 



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# File 'lib/oqgraph/edge_class_methods.rb', line 26

def update_graph_table
  update_oqgraph unless up_to_date?
end