Class: DBA::DiagramPrinter

Inherits:
Object
  • Object
show all
Defined in:
lib/dba/diagram_printer.rb

Direct Known Subclasses

DBMLPrinter, DOTPrinter, PlantUMLPrinter

Instance Method Summary collapse

Constructor Details

#initialize(io = STDOUT) ⇒ DiagramPrinter

Returns a new instance of DiagramPrinter.



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# File 'lib/dba/diagram_printer.rb', line 2

def initialize(io = STDOUT)
  @io = io
end

Instance Method Details



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# File 'lib/dba/diagram_printer.rb', line 62

def print_column(name, type)
end

#print_diagram(database) ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 6

def print_diagram(database)
  print_start

  @primary_keys = {}

  table_names = database.tables

  table_names.each do |name|
    schema_hash = database.schema(name)

    print_table(name, schema_hash)
  end

  table_names.each do |table|
    database.foreign_key_list(table).each do |hash|
      column = hash.fetch(:columns).first

      other_table = hash.fetch(:table)

      other_column = @primary_keys.fetch(other_table)

      print_foreign_key(table, column, other_table, other_column)
    end
  end

  print_end
end

#print_end ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 37

def print_end
end

#print_foreign_key(table, column, other_table, other_column) ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 65

def print_foreign_key(table, column, other_table, other_column)
end

#print_start ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 34

def print_start
end

#print_table(name, schema_hash) ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 40

def print_table(name, schema_hash)
  print_table_start(name)

  schema_hash.each do |column_name, info_hash|
    column_type = info_hash[:type] || info_hash[:db_type]

    if info_hash[:primary_key]
      @primary_keys[name] = column_name
    end

    print_column(column_name, column_type)
  end

  print_table_end(name)
end

#print_table_end(name) ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 59

def print_table_end(name)
end

#print_table_start(name) ⇒ Object 



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# File 'lib/dba/diagram_printer.rb', line 56

def print_table_start(name)
end