Class FlexiRecord::IsolationLevel
In: lib/flexirecord.rb
Parent: Object

Transaction isolation levels are represented by (constant) IsolationLevel objects:

  • IsolationLevel::ReadUncommitted (Data written by concurrent uncommitted transactions may be read.)
  • IsolationLevel::ReadCommitted (Only data, which has been committed by other transactions is read.)
  • IsolationLevel::RepeatableRead
  • IsolationLevel::Serializable (The first query inside a transaction generates a "snapshot" of the database, which is then used for following read accesses.)

Methods

<=>   by_symbol   inspect   new   to_i   to_s  

Included Modules

Comparable

Constants

ReadUncommitted = new(0, :read_uncommitted, 'READ UNCOMMITTED', 'ReadUncommitted')
ReadCommitted = new(1, :read_committed, 'READ COMMITTED', 'ReadCommitted')
RepeatableRead = new(2, :repeatable_read, 'REPEATABLE READ', 'RepeatableRead')
Serializable = new(3, :serializable, 'SERIALIZABLE', 'Serializable')

Public Class methods

by_symbol(symbol)

Returns an IsolationLevel object, matching one of these symbols:

  • :read_uncommitted
  • :read_committed
  • :repeatable_read
  • :serializable
new(integer, symbol, sql, name)

Used for generating the 4 constants representing the possible isolation levels.

Public Instance methods

<=>(other)

Compares the isolation level with another. (Isolation levels providing fewer isolation are considered smaller.)

inspect()

Returns the name of the constant referring to the isolation level.

to_i()

Returns an integer representing the isolation level, which is also used for comparing/ordering them.

to_s()

Returns the SQL string representation of the isolation level.

[Validate]