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  • Raise InvalidContext error when the current state does not define a state-driven behavior
  • Fix target state being indeterminate for transitions that use blacklists
  • Allow super to be called within state-driven behaviors

1.2.0 / 2013-03-30

  • Allow multiple whitelisted / blacklisted :to states when definining transitions
  • Fix event attributes not being processed when saved via association autosaving
  • Fix Mongoid integration not setting initial state attributes properly for associations
  • Completely rewrite ORM action hooks to behave more consistently across the board
  • Change transitions to be executed the same whether using ORM save actions or not
  • Fix around_transition callbacks not being executed properly in ORM integrations
  • Fix additional transitions not being able to be fired in transition callbacks
  • Add documentation on the order in which transition callbacks run within ORM integrations
  • Update README to include a topic on explicit vs. implicit event transitions [Nathan Long]
  • Fix around_transition pausing not being marked as unsupported for rubinius [Daniel Huckstep]
  • Fix all / any / same matchers not being able to be used in :from / :to options in transitions and callbacks
  • Fix ActiveModel locale paths not being loaded properly under certain JRuby environments [Brad Heller]
  • Remove dependency on the validation_class_methods plugin for Sequel 2.12.0+ [Casey Howard]
  • Remove dependency on command-line git binaries from within the gemspec
  • Fix deprecation warnings on ruby-graphviz 1.0.3+
  • Update minimum required ruby-graphviz version to 0.9.17
  • Fix aliased fields in Mongoid 2.4.0+ not being automatically detected
  • Add Mongoid 3.0.0+ support
  • Fix scopes getting generated multiple times when the singular / plural machine names are the same but of a different type (symbol vs. string)
  • Add initial support for ActiveRecord / ActiveModel 4.0.0 beta
  • Fix static initial states always being set even when the state has already been initialized in non-ORM integrations
  • Generate a warning when the ORM's backend and state_machine define conflicting initial states for an attribute
  • Fix all Ruby warnings
  • Fix callbacks not working for methods that respond via method_missing [Balwant Kane]
  • Fix observer callbacks being run when disabled in ActiveModel / ActiveRecord integrations
  • Add YARD integration for autogenerating documentation / embedding visualizations of state machines
  • Allow states / events to be drawn with their human name instead of their internal name

1.1.2 / 2012-01-20

  • Fix states not being initialized properly on ActiveRecord 3.2+

1.1.1 / 2011-12-31

  • Fix fields being defined for Mongoid / MongoMapper state attributes even if they're already defined in the model
  • Raise error when states / events are referenced in a definition with different types (e.g. both Strings and Symbols)
  • Allow all states / events to be looked up by their string / symbol equivalent
  • Allow state_machine to be loaded without extensions to the Ruby core

1.1.0 / 2011-11-13

  • Allow the transitions / known states for an event to be reset
  • Add fire_#{name}_event instance method for firing an arbitrary event on a state machine
  • Improve InvalidTransition exception messages to include the failure reason(s) in ORM integrations
  • Don't allow around_transitions to attempt to be called in multiple execution contexts when run in jruby
  • Allow :from option to be used in transitions defined within state contexts
  • Fix arguments / block not being preserved when chaining methods defined in state contexts
  • Fix super not being allowed when a method is defined for multiple state contexts
  • Change loopbacks to only cause objects to be persisted when the ORM decides it's necessary, instead of always forcing persistence
  • Fix Mongoid 2.3.x integrations not initializing dynamic states in the same manner as other integrations with initialize callbacks

1.0.3 / 2011-11-03

  • Fix MongoMapper 0.10.0+ integrations not matching versions properly
  • Update warnings for method conflicts to include instructions on how to ignore conflicts
  • Fix state initialization in Mongoid 2.3.x integrations [Durran Jordan]
  • Fix after_transition callbacks sometimes not running in Mongoid 2.2.x integrations
  • Automatically load the plugins required in Sequel integrations
  • Allow all / any matcher helpers to be used when defining states / events
  • Allow states / events to be referenced by the string equivalent of their name
  • Fix observer callbacks being run incorrectly when using nil states in ActiveModel-based integrations
  • Remove ActiveModel Observer method chains in order to better ensure compatibility
  • Update DataMapper integration for 1.2.0+ support [Markus Schirp]
  • Provide access to the human state name in invalid_transition translations
  • Add support for i18n keys in the form of #{i18n_scope}.state_machines.#{model_name}.states/events.#{value}
  • Clarify documentation on writing to state machine attributes, using factory_girl and can_#{event} / #{event}_transition helpers
  • Add documentation for dynmically generating state machines

1.0.2 / 2011-08-09

  • Allow transitions to be defined within a state, event, or machine context
  • Use supported framework hooks for integrating Sequel 3.24.0+
  • Use appraisal for testing integrations
  • Improve documentation on the handling of method conflicts
  • Update Mongoid integration for 2.1.0+ support
  • Fix ActiveRecord machine state predicates incorrectly calling superclass implementation when using targeted attributes
  • Fix error when defining states with the same name as the state's machine in ActiveRecord, MongoMapper, and Mongoid integrations
  • Fix machine state predicate not calling superclass implementation if defined after machine definition
  • Generate warnings when defining a helper method more than once
  • Fix multiple machines not being able to target the same attribute if all possible states aren't defined in each
  • Fix ActiveModel / DataMapper integrations not overriding StateMachine::Machine#after_initialize properly
  • Improve documentation for overriding states and integration transactions

1.0.1 / 2011-05-30

  • Add the ability to ignore method conflicts for helpers
  • Generate warnings for any helper, not just state helpers, that has a conflicting method defined in the class
  • Fix scopes in Sequel not working if the table name contains double underscores or is not a string/symbol
  • Add full support for chaining state scopes within Sequel integrations
  • Fix Rails 3.1 deprecation warnings for configuring engine locales [Stefan Penner]

1.0.0 / 2011-05-12

  • Celebrate

0.10.4 / 2011-04-14

  • Fix translations not being available under certain environments in Rails applications

0.10.3 / 2011-04-07

  • Fix state initialization failing in ActiveRecord 3.0.2+ when using with_state scopes for the default scope

0.10.2 / 2011-03-31

  • Use more integrated state initialization hooks for ActiveRecord, Mongoid, and Sequel
  • Remove mass-assignment filtering usage in all ORM integrations
  • Only support official Mongoid 2.0.0 release and up (no more RC support)
  • Fix attributes getting initialized more than once if different state machines use the same attribute
  • Only initialize states if state is blank and blank is not a valid state
  • Fix instance / class helpers failing when used with certain libraries (such as Thin)

0.10.1 / 2011-03-22

  • Fix classes with multiple state machines failing to initialize in ActiveRecord / Mongoid / Sequel integrations

0.10.0 / 2011-03-19

  • Support callback terminators in MongoMapper 0.9.0+
  • Fix pluralization integration on DataMapper 1.0.0 and 1.1.0
  • Allow transition guards to be bypassed for event / transition / path helpers
  • Allow state / condition requirements to be specified for all event / transition / path helpers
  • Add the ability to skip automatically initializing state machines on #initialize
  • Add #{name}_paths for walking the available paths in a state machine
  • Add Mongoid 2.0.0+ support
  • Use around hooks to improve compatibility with other libraries in ActiveModel / ActiveRecord / MongoMapper integrations
  • Add support for MassAssignmentSecurity feature in ActiveModel integrations
  • Add support for more observer hooks within MongoMapper integrations
  • Add i18n support for MongoMapper validation errors
  • Update support for MongoMapper integration based on rails3 branch
  • Fix objects not getting marked as dirty in all integrations when #{name}_event is set
  • Generate warnings when conflicting state / event names are detected
  • Allow fallback to generic state predicates when individual predicates are already defined in the owner class
  • Replace :include_failures after_transition option with new after_failure callback
  • Provide access to transition context when raising InvalidEvent / InvalidTransition exceptions

0.9.4 / 2010-08-01

  • Fix validation / save hooks in Sequel 3.14.0+
  • Fix integration with dirty attribute tracking on DataMapper 1.0.1+
  • Fix DataMapper 1.0.1+ tests producing warnings
  • Fix validation error warnings in ActiveModel / ActiveRecord 3.0.0 beta5+
  • Fix mass-assignment sanitization breaking in ActiveRecord 3.0.0 beta5+ [Akira Matsuda]

0.9.3 / 2010-06-26

  • Allow access to human state / event names in transitions and for the current state
  • Use human state / event names in error messages
  • Fix event names being used inconsistently in error messages
  • Allow access to the humanized version of state / event names via human_state_name / human_state_event_name
  • Allow MongoMapper 0.8.0+ scopes to be chainable
  • Fix i18n deprecation warnings in ActiveModel / ActiveRecord 3.0.0.beta4
  • Fix default error message translations overriding existing locales in ActiveModel / ActiveRecord

0.9.2 / 2010-05-24

  • Fix MongoMapper integration failing in Ruby 1.9.2
  • Fix Rakefile not loading in Ruby 1.9.2 [Andrea Longhi]
  • Fix nil / false :integration configuration not being respected

0.9.1 / 2010-05-02

  • Fix ActiveRecord 2.0.0 - 2.2.3 integrations failing if version info isn't already loaded
  • Fix integration with dirty attribute tracking on DataMapper 0.10.3
  • Fix observers failing in ActiveRecord 3.0.0.beta4+ integrations
  • Fix deprecation warning in Rails 3 railtie [Chris Yuan]

0.9.0 / 2010-04-12

  • Use attribute-based event transitions whenever possible to ensure consistency
  • Fix action helpers being defined when the action is only defined in the machine's owner class
  • Disable attribute-based event transitions in DataMapper 0.9.4 - 0.9.6 when dm-validations is being used
  • Add support for DataMapper 0.10.3+
  • Add around_transition callbacks
  • Fix transition failures during save not being handled correctly in Sequel 2.12.0+
  • Fix attribute-based event transitions not hooking in properly in DataMapper 0.10.0+ and Sequel 2.12.0+
  • Fix dynamic initial states causing errors in Ruby 1.9+ if no arguments are defined in the block
  • Add MongoMapper 0.5.5+ support
  • Add ActiveModel 3.0+ support for use with integrations that implement its interface
  • Fix DataMapper integration failing when ActiveSupport is loaded in place of Extlib
  • Add version dependencies for ruby-graphviz
  • Remove app-specific rails / merb rake tasks in favor of always running state_machine:draw
  • Add Rails 3 railtie for automatically loading rake tasks when installed as a gem

0.8.1 / 2010-03-14

  • Release gems via rake-gemcutter instead of rubyforge
  • Move rake tasks to lib/tasks
  • Dispatch state behavior to the superclass if it's undefined for a particular state [Sandro Turriate and Tim Pope]
  • Fix state / event names not supporting i18n in ActiveRecord
  • Fix original ActiveRecord::Observer#update not being used for non-state_machine callbacks [Jeremy Wells]
  • Add support for ActiveRecord 3.0
  • Fix without_{name} scopes not quoting columns in ActiveRecord [Jon Evans]
  • Fix without_{name} scopes not scoping columns to the table in ActiveRecord and Sequel [Jon Evans]
  • Fix custom state attributes not being marked properly as changed in ActiveRecord
  • Fix tracked attributes changes in ActiveRecord / DataMapper integrations not working correctly for non-loopbacks [Joe Lind]
  • Fix plural scope names being incorrect for DataMapper 0.9.4 - 0.9.6
  • Fix deprecation warnings for ruby-graphviz 0.9.0+
  • Add support for ActiveRecord 2.0.*
  • Fix nil states being overwritten when they're explicitly set in ORM integrations
  • Fix default states not getting set in ORM integrations if the column has a default
  • Fix event transitions being kept around while running actions/callbacks, sometimes preventing object marshalling

0.8.0 / 2009-08-15

  • Add support for DataMapper 0.10.0
  • Always interpet nil return values from actions as failed attempts
  • Fix loopbacks not causing records to save in ORM integrations if no other fields were changed
  • Fix events not failing with useful errors when an object's state is invalid
  • Use more friendly NoMethodError messages for state-driven behaviors
  • Fix before_transition callbacks getting run twice when using event attributes in ORM integrations
  • Add the ability to query for the availability of specific transitions on an object
  • Allow after_transition callbacks to be explicitly run on failed attempts
  • By default, don't run after_transition callbacks on failed attempts
  • Fix not allowing multiple methods to be specified as arguments in callbacks
  • Fix initial states being set when loading records from the database in Sequel integration
  • Allow static initial states to be set earlier in the initialization of an object
  • Use friendly validation errors for nil states
  • Fix states not being validated properly when using custom names in ActiveRecord / DataMapper integrations

0.7.6 / 2009-06-17

  • Allow multiple state machines on the same class to target the same attribute
  • Add support for :attribute to customize the attribute target, assuming the name is the first argument of #state_machine
  • Simplify reading from / writing to machine-related attributes on objects
  • Fix locale for ActiveRecord getting added to the i18n load path multiple times [Reiner Dieterich]
  • Fix callbacks, guards, and state-driven behaviors not always working on tainted classes [Brandon Dimcheff]
  • Use Ruby 1.9's built-in Object#instance_exec for bound callbacks when it's available
  • Improve performance of cached dynamic state lookups by 25%

0.7.5 / 2009-05-25

  • Add built-in caching for dynamic state values when the value only needs to be generated once
  • Fix flawed example for using record ids as state values
  • Don't evaluate state values until they're actually used in an object instance
  • Make it easier to use event attributes for actions defined in the same class as the state machine
  • Fix #save/save! running transitions in ActiveRecord integrations even when a machine's action is not :save

0.7.4 / 2009-05-23

  • Fix #save! not firing event attributes properly in ActiveRecord integrations
  • Fix log files being included in gems

0.7.3 / 2009-04-25

  • Require DataMapper version be >= 0.9.4
  • Explicitly load Sequel's built-in inflector (>= 2.12.0) for scope names
  • Don't use qualified name for event attributes
  • Fix #valid? being defined for DataMapper resources when dm-validations isn't loaded
  • Add auto-validation of values allowed for the state attribute in ORM integrations

0.7.2 / 2009-04-08

  • Add support for running multiple methods in a callback without using blocks
  • Add more flexibility around how callbacks are defined
  • Add security documentation around mass-assignment in ORM integrations
  • Fix event attribute transitions being publicly accessible

0.7.1 / 2009-04-05

  • Fix machines failing to generate graphs when run from Merb tasks

0.7.0 / 2009-04-04

  • Add #{attribute}_event for automatically firing events when the object's action is called
  • Make it easier to override state-driven behaviors
  • Rollback state changes when the action fails during transitions
  • Use :messages instead of :invalid_message for customizing validation errors
  • Use more human-readable validation errors
  • Add support for more ActiveRecord observer hooks
  • Add support for targeting multiple specific state machines in DataMapper observer hooks
  • Don't pass the result of the action as an argument to callbacks (access via Transition#result)
  • Fix incorrect results being used when running transitions in parallel
  • Fix transition args not being set when run in parallel
  • Allow callback terminators to be set on an application-wide basis
  • Only catch :halt during before / after transition callbacks
  • Fix ActiveRecord predicates being overwritten if they're already defined in the class
  • Allow machine options to be set on an integration-wide basis
  • Turn transactions off by default in DataMapper integrations
  • Add support for configuring the use of transactions
  • Simplify reading/writing of attributes
  • Simplify access to state machines via #state_machine(:attribute) without generating dupes
  • Fix assumptions that dm-validations is always available in DataMapper integration
  • Automatically define DataMapper properties for machine attributes if they don't exist
  • Add Transition#qualified_event, #qualified_from_name, and #qualified_to_name
  • Add #fire_events / #fire_events! for running events on multiple state machines in parallel
  • Rename next_#{event}_transition to #{event}_transition
  • Add #{attribute}_transitions for getting the list of transitions that can be run on an object
  • Add #{attribute}_events for getting the list of events that can be fired on an object
  • Use generated non-bang event when running bang version so that overriding one affects the other
  • Provide access to arguments passed into an event from transition callbacks via Transition#args

0.6.3 / 2009-03-10

  • Add support for customizing the graph's orientation
  • Use the standard visualizations for initial (open arrow) and final (double circle) states
  • Highlight final states in GraphViz drawings

0.6.2 / 2009-03-08

  • Make it easier to override generated instance / class methods

0.6.1 / 2009-03-07

  • Add i18n support for ActiveRecord validation errors
  • Add a validation error when failing to transition for ActiveRecord / DataMapper / Sequel integrations

0.6.0 / 2009-03-03

  • Allow multiple conditions for callbacks / class behaviors
  • Add support for state-driven class behavior with :if/:unless options
  • Alias Machine#event as Machine#on
  • Fix nil from/to states not being handled properly
  • Simplify hooking callbacks into loopbacks
  • Add simplified transition/callback requirement syntax

0.5.2 / 2009-02-17

  • Improve pretty-print of events
  • Simplify state/event matching design, improving guard performance by 30%
  • Add better error notification when conflicting guard options are defined
  • Fix scope name pluralization not being applied correctly

0.5.1 / 2009-02-11

  • Allow states to be drawn as ellipses to accommodate long names
  • Fix rake tasks not being registered in Rails/Merb applications
  • Never automatically define machine attribute accessors when using an integration

0.5.0 / 2009-01-11

  • Add to_name and from_name to transition objects
  • Add nicely formatted #inspect for transitions
  • Fix ActiveRecord integrations failing when the database doesn't exist yet
  • Fix states not being drawn in GraphViz graphs in the correct order
  • Add nicely formatted #inspect for states and events
  • Simplify machine context-switching
  • Store events/states in enumerable node collections
  • No longer allow subclasses to change the integration
  • Move fire! action logic into the Event class (no longer calls fire action on the object)
  • Allow states in subclasses to have different values
  • Recommend that all states be referenced as symbols instead of strings
  • All states must now be named (and can be associated with other value types)
  • Add support for customizing the actual stored value for a state
  • Add compatibility with Ruby 1.9+

0.4.3 / 2008-12-28

  • Allow dm-observer integration to be optional
  • Fix non-lambda callbacks not working for DataMapper/Sequel

0.4.2 / 2008-12-28

  • Fix graphs not being drawn the same way consistently
  • Add support for sharing transitions across multiple events
  • Add support for state-driven behavior
  • Simplify initialize hooks, requiring super to be called instead
  • Add :namespace option for generated state predicates / event methods

0.4.1 / 2008-12-16

  • Fix nil states not being handled properly in guards, known states, or visualizations
  • Fix the same node being used for different dynamic states in GraphViz output
  • Always include initial state in the list of known states even if it's dynamic
  • Use consistent naming scheme for dynamic states in GraphViz output
  • Allow blocks to be directly passed into machine class
  • Fix attribute predicates not working on attributes that represent columns in ActiveRecord

0.4.0 / 2008-12-14

  • Remove the PluginAWeek namespace
  • Add generic attribute predicate (e.g. "#{attribute}?(state_name)") and state predicates (e.g. "#{state}?")
  • Add Sequel support
  • Fix aliasing :initialize on ActiveRecord models causing warnings when the environment is reloaded
  • Fix ActiveRecord state machines trying to query the database on unmigrated models
  • Fix initial states not getting set when the current value is an empty string [Aaron Gibralter]
  • Add rake tasks for generating graphviz files for state machines [Nate Murray]
  • Fix initial state not being included in list of known states
  • Add other_states directive for defining additional states not referenced in transitions or callbacks [Pete Forde]
  • Add next_#{event}_transition for getting the next transition that would be performed if the event were invoked
  • Add the ability to override the pluralized name of an attribute for creating scopes
  • Add the ability to halt callback chains by: throw :halt
  • Add support for dynamic to states in transitions (e.g. :to => lambda {Time.now})
  • Add support for using real blocks in before_transition/after_transition calls instead of using the :do option
  • Add DataMapper support
  • Include states referenced in transition callbacks in the list of a machine's known states
  • Only generate the known states for a machine on demand, rather than calculating beforehand
  • Add the ability to skip state change actions during a transition (e.g. vehicle.ignite(false))
  • Add the ability for the state change action (e.g. save for ActiveRecord) to be configurable
  • Allow state machines to be defined on any Ruby class, not just ActiveRecord (removes all external dependencies)
  • Refactor transitions, guards, and callbacks for better organization/design
  • Use a class containing the transition context in callbacks, rather than an ordered list of each individual attribute
  • Add without_#{attribute} named scopes (opposite of the existing with_#{attribute} named scopes) [Sean O'Brien]

0.3.1 / 2008-10-26

  • Fix the initial state not getting set when the state attribute is mass-assigned but protected
  • Change how the base module is included to prevent namespacing conflicts

0.3.0 / 2008-09-07

  • No longer allow additional arguments to be passed into event actions

  • Add support for can_#{event}? for checking whether an event can be fired based on the current state of the record

  • Don't use callbacks for performing transitions

  • Fix state machines in subclasses not knowing what states/events/transitions were defined by superclasses

  • Replace all before/after_exit/enter/loopback callback hooks and :before/:after options for events with before_transition/after_transition callbacks, e.g.

    before_transition :from => 'parked', :do => :lock_doors # was before_exit :parked, :lock_doors after_transition :on => 'ignite', :do => :turn_on_radio # was event :ignite, :after => :turn_on_radio do

  • Always save when an event is fired even if it results in a loopback [Jürgen Strobel]

  • Ensure initial state callbacks are invoked in the proper order when an event is fired on a new record

  • Add before_loopback and after_loopback hooks [Jürgen Strobel]

0.2.1 / 2008-07-05

  • Add more descriptive exceptions
  • Assume the default state attribute is "state" if one is not provided
  • Add :except_from option for transitions if you want to blacklist states
  • Add PluginAWeek::StateMachine::Machine#states
  • Add PluginAWeek::StateMachine::Event#transitions
  • Allow creating transitions with no from state (effectively allowing the transition for any from state)
  • Reduce the number of objects created for each transition

0.2.0 / 2008-06-29

  • Add a non-bang version of events (e.g. park) that will return a boolean value for success
  • Raise an exception if the bang version of events are used (e.g. park!) and no transition is successful
  • Change callbacks to act a little more like ActiveRecord
  • Avoid using string evaluation for dynamic methods

0.1.1 / 2008-06-22

  • Remove log files from gems

0.1.0 / 2008-05-05

  • Completely rewritten from scratch
  • Renamed to state_machine
  • Removed database dependencies
  • Removed models in favor of an attribute-agnostic design
  • Use ActiveSupport::Callbacks instead of eval_call
  • Remove dry_transaction_rollbacks dependencies
  • Added functional tests
  • Updated documentation

0.0.1 / 2007-09-26

  • Add dependency on custom_callbacks

  • Move test fixtures out of the test application root directory

  • Improve documentation

  • Remove the StateExtension module in favor of adding singleton methods to the stateful class

  • Convert dos newlines to unix newlines

  • Fix error message when a given event can't be found in the database

  • Add before_#{action} and #{action} callbacks when an event is performed

  • All state and event callbacks can now explicitly return false in order to cancel the action

  • Refactor ActiveState callback creation

  • Refactor unit tests so that they use mock classes instead of themselves

  • Allow force_reload option to be set in the state association

  • Don't save the entire model when updating the state_id

  • Raise exception if a class tries to define a state more than once

  • Add tests for PluginAWeek::Has::States::ActiveState

  • Refactor active state/active event creation

  • Fix owner_type not being set correctly in active states/events of subclasses

  • Allow subclasses to override the initial state

  • Fix problem with migrations using default null when column cannot be null

  • Moved deadline support into a separate plugin (has_state_deadlines).

  • Added many more unit tests.

  • Simplified many of the interfaces for maintainability.

  • Added support for turning off recording state changes.

  • Removed the short_description and long_description columns, in favor of an optional human_name column.

  • Fixed not overriding the correct equality methods in the StateTransition class.

  • Added to_sym to State and Event.

  • State#name and Event#name now return the string version of the name instead of the symbol version.

  • Added State#human_name and Event#human_name to automatically figure out what the human name is if it isn't specified in the table.

  • Updated manual rollbacks to use the new Rails edge api (ActiveRecord::Rollback exception).

  • Moved StateExtension class into a separate file in order to help keep the has_state files clean.

  • Renamed InvalidState and InvalidEvent exceptions to StateNotFound and EventNotFound in order to follow the ActiveRecord convention (i.e. RecordNotFound).

  • Added StateNotActive and EventNotActive exceptions to help differentiate between states which don't exist and states which weren't defined in the class.

  • Added support for defining callbacks like so:

    def before_exit_parked end

    def after_enter_idling end

  • Added support for defining callbacks using class methods:

    before_exit_parked :fasten_seatbelt

  • Added event callbacks after the transition has occurred (e.g. after_park)

  • State callbacks no longer receive any of the arguments that were provided in the event action

  • Updated license to include our names.