Class: ActiveRecord::ConnectionAdapters::FbColumn

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

Overview

:nodoc:

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, domain, type, sub_type, length, precision, scale, default_source, null_flag) ⇒ FbColumn

Returns a new instance of FbColumn.



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# File 'lib/active_record/connection_adapters/fb_adapter.rb', line 76

def initialize(name, domain, type, sub_type, length, precision, scale, default_source, null_flag)
  @firebird_type = Fb::SqlType.from_code(type, sub_type || 0)
  super(name.downcase, nil, @firebird_type, !null_flag)
  @default = parse_default(default_source) if default_source
  case @firebird_type
    when 'VARCHAR', 'CHAR'
      @limit = length
    when 'DECIMAL', 'NUMERIC'
      @precision, @scale = precision, scale.abs
  end
  @domain, @sub_type = domain, sub_type
end

Class Method Details

.value_to_boolean(value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/fb_adapter.rb', line 119

def self.value_to_boolean(value)
  %W(#{FbAdapter.boolean_domain[:true]} true t 1).include? value.to_s.downcase
end

Instance Method Details

#default ⇒ Object

Submits a CAST query to the database, casting the default value to the specified SQL type. This enables Firebird to provide an actual value when context variables are used as column defaults (such as CURRENT_TIMESTAMP).



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# File 'lib/active_record/connection_adapters/fb_adapter.rb', line 102

def default
  if @default
    sql = "SELECT CAST(#{@default} AS #{column_def}) FROM RDB$DATABASE"
    connection = ActiveRecord::Base.connection
    if connection
      value = connection.select_one(sql)['cast']
      if value.acts_like?(:date) or value.acts_like?(:time)
        nil
      else
        type_cast(value)
      end
    else
      raise ConnectionNotEstablished, "No Firebird connections established."
    end
  end
end

#type ⇒ Object 



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# File 'lib/active_record/connection_adapters/fb_adapter.rb', line 89

def type
  if @domain =~ /BOOLEAN/
    :boolean
  elsif @type == :binary and @sub_type == 1
    :text
  else
    @type
  end
end