Aasm gem

It currently provides adapters for many ORMs but it can be used for any Ruby class, no matter what parent class it has if any, aasm gem. Adding a state machine is as simple as including the AASM module and aasm gem defining states and events together with their transitions :.

When it changes colors, the next color is based on the current one. You could write some if statements like this:. Every state knows itself so there is no need to check for the current state. This translates into less conditional statements which are often a source of complexity. However, we still want to share the initialize method between all the states because all of them need the context TrafficLight object to signal a state change. You can use a state machine to solve games that depend on the current state, like RubyWarrior.

Aasm gem

The gem exposes the generate Rake task, that can be used to generate the diagrams of state machines into PNG images. The generate task accepts two parameters:. If no state machine name is provided, the task will use default for the file name. Once installed, the gem automatically integrates with Rails via Railties and exposes the task automatically. If the model contains only one state machine, or you just want to generate for the "default" one you can skip the state machine name parameter. For plain Ruby projects the gem includes a Rakefile that can be loaded in your project's Rakefile, using source code along the lines of:. AASM Diagram is heavily inspired by rails-erd. The gem is available as open source under the terms of the MIT License. Skip to content. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. You switched accounts on another tab or window.

View all files. Whatever column name is used, make sure to add a migration to provide this column of type string.

It currently provides adapters for ActiveRecord , Mongoid , and Mongomapper but it can be used for any Ruby class, no matter what parent class it has if any. Adding a state machine is as simple as including the AASM module and start defining states and events together with their transitions :. If you don't like exceptions and prefer a simple true or false as response, tell AASM not to be whiny :. When firing an event, you can pass a block to the method, it will be called only if the transition succeeds :. You can define a number of callbacks for your transitions. These methods will be called, when certain criteria are met, like entering a particular state:. Note that when passing arguments to a state transition, the first argument must be the desired end state.

It currently provides adapters for many ORMs but it can be used for any Ruby class, no matter what parent class it has if any. Adding a state machine is as simple as including the AASM module and start defining states and events together with their transitions :. This provides you with a couple of public methods for instances of the class Job :. If you don't like exceptions and prefer a simple true or false as response, tell AASM not to be whiny :. When firing an event, you can pass a block to the method, it will be called only if the transition succeeds :.

Aasm gem

It currently provides adapters for ActiveRecord and Mongoid , but it can be used for any Ruby class, no matter what parent class it has if any. Adding a state machine is as simple as including the AASM module and start defining states and events together with their transitions :. If you don't like exceptions and prefer a simple true or false as response, tell AASM not to be whiny :. You can define a number of callbacks for your transitions. These methods will be called, when certain criteria are met, like entering a particular state:. In case of an error during the event processing the error is rescued and passed to :error callback, which can handle it or re-raise it for further propagation. Let's assume you want to allow particular transitions only if a defined condition is given.

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If you don't need scopes or simply don't want them , disable their creation when defining the AASM states, like this:. You can explicitly pass the name of the method which provides access to the enumeration mapping as a value of enum , or you can simply set it to true. Branches Tags. Whatever column name is used, make sure to add a migration to provide this column of type string. Packages 0 No packages published. Reload to refresh your session. View all files. You can override this by defining your favorite column name, using :column like this:. Folders and files Name Name Last commit message. Extending AASM. MIT license. Adding a state machine is as simple as including the AASM module and start defining states and events together with their transitions :. The current event triggered. You signed in with another tab or window. In the meantime you can use my fork , there may still be some minor issues but I intend to extensively use it myself, so fixes should come fast.

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Go to file. In the above example, we wish to transition to :running state and run the callback with :defragmentation argument. Furthermore, if your column has integer type which is normally the case when you're working with Rails enums , you can omit :enum setting AASM auto-detects this situation and enabled enum support. You can tell AASM to try to write a timestamp whenever a new state is entered. AASM Diagram is heavily inspired by rails-erd. There are currently 3 transactional callbacks that can be handled on the event, and 2 transactional callbacks for all events. View all files. AASM comes with support for ActiveRecord and allows automatic persisting of the object's state in the database. You signed in with another tab or window. Multiple state machines per class. Let's suppose we have common logic across many AASM models.