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support if and unless guard syntax (extended README)

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Thorsten Böttger 2014-11-14 18:08:34 +01:00
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4
CHANGELOG.md
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@ -1,8 +1,8 @@
# CHANGELOG # CHANGELOG
## 3.9.0 (not yet released) ## 3.5.0 (not yet released)
* deprecated old aasm_* class methods (old-style DSL), in preparation for AASM v4.0.0 * support `if` and `unless` guard syntax: (see [issue #179](https://github.com/aasm/aasm/issues/179) and [issue #181](https://github.com/aasm/aasm/issues/181)), thanks to [@bigtunacan](https://github.com/bigtunacan)
## 3.4.0 ## 3.4.0

14
README.md
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@ -248,6 +248,20 @@ If you want to provide guards for all transitions within an event, you can use e
end end
``` ```
If you prefer a more Ruby-like guard syntax, you can use `if` and `unless` as well:
```ruby
event :clean do
transitions :from => :running, :to => :cleaning, :unless => :cleaning_needed?
end
event :sleep do
transitions :from => :running, :to => :sleeping, :if => :cleaning_needed?
end
end
```
### Transitions ### Transitions
In the event of having multiple transitions for an event, the first transition that successfully completes will stop other transitions in the same event from being processed. In the event of having multiple transitions for an event, the first transition that successfully completes will stop other transitions in the same event from being processed.