Class: ActiveRecord::ConnectionAdapters::TableDefinition

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/connection_adapters/ibm_db_adapter.rb

Instance Method Summary collapse

Constructor Details

#initialize(base, name = nil, temporary = nil, options = nil) ⇒ TableDefinition

Returns a new instance of TableDefinition.



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 439

def initialize(base, name=nil, temporary=nil, options=nil)
  if(self.respond_to?(:indexes))
    @ar3 = false
  else
    @ar3 = true
  end
  @columns = []
  @columns_hash = {}
  @indexes = {}
  @base = base
  @temporary = temporary
  @options = options
  @name = name
  @foreign_keys = {}
end

Instance Method Details

#bigint(*args) ⇒ Object 



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 499

def bigint(*args)
  ibm_parse_column_attributes_args('bigint',*args)
  return self
end

#char(*args) ⇒ Object Also known as: character

Method to support the new syntax of rails 2.0 migrations (short-hand definitions) for columns of type char [character]



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 505

def char(*args)
  ibm_parse_column_attributes_args('char',*args)
  return self
end

#column(name, type, options = {}) ⇒ Object

Overrides the abstract adapter in order to handle the DEFAULT option for the native XML datatype



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 513

def column(name, type, options ={})
  # construct a column definition where @base is adaptor instance
  if(@ar3)
    column = ColumnDefinition.new(@base, name, type)
  else
    column = ColumnDefinition.new(name, type)
  end
  # DB2 does not accept DEFAULT NULL option for XML
  # for table create, but does accept nullable option
  unless type.to_s == 'xml'
    column.null    = options[:null]
    column.default = options[:default]
  else
    column.null    = options[:null]
    # Override column object's (instance of ColumnDefinition structure)
    # to_s which is expected to return the create_table SQL fragment
    # and bypass DEFAULT NULL option while still appending NOT NULL
    def column.to_s
      sql = "#{base.quote_column_name(name)} #{type}"
      unless self.null == nil
        sql << " NOT NULL" if (self.null == false)
      end
      return sql
    end
  end

  column.scale     = options[:scale]      if options[:scale]
  column.precision = options[:precision]  if options[:precision]
  # append column's limit option and yield native limits
  if options[:limit]
    column.limit   = options[:limit]
  elsif @base.native_database_types[type.to_sym]
    column.limit   = @base.native_database_types[type.to_sym][:limit] if @base.native_database_types[type.to_sym].has_key? :limit
  end

  unless @columns.nil? or @columns.include? column
    @columns << column 
  end

  @columns_hash[name] = column

  return self
end

#decfloat(*args) ⇒ Object

Method to support the new syntax of rails 2.0 migrations (short-hand definitions) for columns of type decfloat



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 484

def decfloat(*args)
  ibm_parse_column_attributes_args('decfloat',*args)
  return self
end

#double(*args) ⇒ Object

Method to support the new syntax of rails 2.0 migrations (short-hand definitions) for columns of type double



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 478

def double(*args)
  ibm_parse_column_attributes_args('double',*args)
  return self
end

#graphic(*args) ⇒ Object 



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 489

def graphic(*args)
  ibm_parse_column_attributes_args('graphic',*args)
  return self
end

#native ⇒ Object 



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 455

def native
  @base.native_database_types
end

#vargraphic(*args) ⇒ Object 



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 494

def vargraphic(*args)
  ibm_parse_column_attributes_args('vargraphic',*args)
  return self
end

#xml(*args) ⇒ Object

Method to support the new syntax of rails 2.0 migrations for columns of type xml



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# File 'lib/active_record/connection_adapters/ibm_db_adapter.rb', line 472

def xml(*args )
  ibm_parse_column_attributes_args('xml', *args)
  return self
end