Class: ActiveRecord::ConnectionAdapters::FirebirdColumn

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

Overview

:nodoc:

Constant Summary collapse

VARCHAR_MAX_LENGTH = 
32_765
BLOB_MAX_LENGTH = 
32_767

Instance Attribute Summary

Attributes inherited from Column

#limit, #name, #null, #primary, #sql_type

Instance Method Summary collapse

Methods inherited from Column

binary_to_string, #human_name, #klass, #number?, string_to_binary, string_to_date, string_to_dummy_time, string_to_time, #text?, #type_cast_code, value_to_boolean

Constructor Details

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

Returns a new instance of FirebirdColumn.



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# File 'lib/active_record/connection_adapters/firebird_adapter.rb', line 46

def initialize(name, domain, type, sub_type, length, precision, scale, default_source, null_flag)
  @firebird_type = FireRuby::SQLType.to_base_type(type, sub_type).to_s
  super(name.downcase, nil, @firebird_type, !null_flag)
  @default = parse_default(default_source) if default_source
  @limit = type == 'BLOB' ? BLOB_MAX_LENGTH : length
  @domain, @sub_type, @precision, @scale = domain, sub_type, precision, scale
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/firebird_adapter.rb', line 67

def default
  if @default
    sql = "SELECT CAST(#{@default} AS #{column_def}) FROM RDB$DATABASE"
    connection = ActiveRecord::Base.active_connections.values.detect { |conn| conn && conn.adapter_name == 'Firebird' }
    if connection
      type_cast connection.execute(sql).to_a.first['CAST']
    else
      raise ConnectionNotEstablished, "No Firebird connections established."
    end
  end
end

#type ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird_adapter.rb', line 54

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

#type_cast(value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird_adapter.rb', line 79

def type_cast(value)
  if type == :boolean
    value == true or value == ActiveRecord::ConnectionAdapters::FirebirdAdapter.boolean_domain[:true]
  else
    super
  end
end