Class: ActiveRecord::ConnectionAdapters::AbstractAdapter

Inherits:
Object
  • Object
show all
Includes:
Benchmark
Defined in:
lib/active_record/connection_adapters/abstract_adapter.rb

Overview

All the concrete database adapters follow the interface laid down in this class. You can use this interface directly by borrowing the database connection from the Base with Base.connection.

Constant Summary collapse

@@row_even = 
true

Instance Method Summary collapse

Constructor Details

#initialize(connection, logger = nil) ⇒ AbstractAdapter

:nodoc:



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 225

def initialize(connection, logger = nil) # :nodoc:
  @connection, @logger = connection, logger
  @runtime = 0
end

Instance Method Details

#begin_db_transaction ⇒ Object

Begins the transaction (and turns off auto-committing).



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 255

def begin_db_transaction()    end

#columns(table_name, name = nil) ⇒ Object

Returns an array of column objects for the table specified by table_name.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 237

def columns(table_name, name = nil) end

#commit_db_transaction ⇒ Object

Commits the transaction (and turns on auto-committing).



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 258

def commit_db_transaction()   end

#delete(sql, name = nil) ⇒ Object

Executes the delete statement.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 246

def delete(sql, name = nil) end

#insert(sql, name = nil, pk = nil, id_value = nil) ⇒ Object

Returns the last auto-generated ID from the affected table.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 240

def insert(sql, name = nil, pk = nil, id_value = nil) end

#quote(value, column = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 264

def quote(value, column = nil)
  case value
    when String                      then "'#{value.gsub(/\\/,'\&\&').gsub(/'/, "''")}'" # ' (for ruby-mode)
    when NilClass                    then "NULL"
    when TrueClass                   then (column && column.type == :boolean ? "'t'" : "1")
    when FalseClass                  then (column && column.type == :boolean ? "'f'" : "0")
    when Float, Fixnum, Bignum, Date then "'#{value.to_s}'" 
    when Time, DateTime              then "'#{value.strftime("%Y-%m-%d %H:%M:%S")}'"
    else                                  "'#{value.to_yaml.gsub(/'/, "''")}'"
  end
end

#quote_column_name(name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 276

def quote_column_name(name)
  return name
end

#reset_runtime ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 248

def reset_runtime # :nodoc:
  rt = @runtime
  @runtime = 0
  return rt
end

#rollback_db_transaction ⇒ Object

Rollsback the transaction (and turns on auto-committing). Must be done if the transaction block raises an exception or returns false.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 262

def rollback_db_transaction() end

#select_all(sql, name = nil) ⇒ Object

Returns an array of record hashes with the column names as a keys and fields as values.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 231

def select_all(sql, name = nil) end

#select_one(sql, name = nil) ⇒ Object

Returns a record hash with the column names as a keys and fields as values.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 234

def select_one(sql, name = nil) end

#structure_dump ⇒ Object

Returns a string of the CREATE TABLE SQL statements for recreating the entire structure of the database.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 281

def structure_dump() end

#update(sql, name = nil) ⇒ Object

Executes the update statement.



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# File 'lib/active_record/connection_adapters/abstract_adapter.rb', line 243

def update(sql, name = nil) end