Module: TG::Setup

Defined in:
lib/init_db.rb

Class Method Summary collapse

Class Method Details

.init_database(database_instance = V.db) ⇒ Object 



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# File 'lib/init_db.rb', line 3

def self.init_database database_instance= V.db
      stored_namespace =  ActiveOrient::Model.namespace
      ActiveOrient::Init.define_namespace { TG }
      (logger= ActiveOrient::OrientDB.logger).progname= 'TG::Setup#InitDatabase'
      # because edges are not resolved because of the namingconvention
      tg_edges =  [  :time_of, :day_of, :month_of, :grid_of ]  
      time_base_vertices =  [  :stunde, :tag, :monat, :jahr  ]
      edges = V.db.class_hierarchy( base_class: 'E') & tg_edges.map( &:to_s )
      vertices =  V.db.class_hierarchy( base_class: 'tg_time_base' ) & time_base_vertices.map( &:to_s )
      logger.info{ "affected-database-classes: \n #{ (vertices + edges).join(', ')}"  }

      delete_class = -> (c,d) do 
the_class = ActiveOrient::Model.orientdb_class( name: c, superclass: d)
logger.info{  "The Class: "+the_class.to_s+ " removed from Database" }
the_class.delete_class
      end
      if defined?(TimeBase)
vertices.each{|v| delete_class[ v, :tg_time_base ] }
delete_class[ :tg_time_base, :V ] 
      end

  logger.progname= 'TG::Setup#InitDatabase'
  cleared_database = V.db.database_classes 
  logger.info{ "  Creating Classes " }
  V.create_class :time_base         # --> TimeBase
  # hour, day: month cannot be alloacated, because Day is a class of DateTime and thus is reserved
  time_base_classes = TimeBase.create_class *time_base_vertices  # --> Hour, Day, Month
  TimeBase.create_property :value, type:  :integer            
  #
  ## this puts an  index on child-classes
  time_base_classes.each{|c| c.create_index c.ref_name+'_value_idx' , type: :notunique, on: :value }
  
  # modified naming-convention in  model/e.rb
  edges = E.create_class  *tg_edges   # --> TIME_OF, :DAY_OF
  edges.each &:uniq_index

  # restore namespace
  ActiveOrient::Init.define_namespace { stored_namespace }

  V.db.database_classes - cleared_database  # return_value
end