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Add Cast Common Boolean-Like Values To Booleans as a Rails til

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jbranchaud
2019-05-09 16:48:20 -05:00
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rails/cast-common-boolean-like-values-to-booleans.md Normal file
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# Cast Common Boolean-Like Values To Booleans
Sometimes you have to deal with values that are supposed to represent booleans,
but they aren't actually boolean values (i.e. `"t"` instead of `true`). Rail's
`ActiveModel` has a helper for casting these common boolean-like values to
actual booleans.
```ruby
> ActiveModel::Type::Boolean.new.cast('f')
=> false
> ActiveModel::Type::Boolean.new.cast('t')
=> true
> ActiveModel::Type::Boolean.new.cast('true')
=> true
> ActiveModel::Type::Boolean.new.cast('FALSE')
=> false
> ActiveModel::Type::Boolean.new.cast(0)
=> false
> ActiveModel::Type::Boolean.new.cast(1)
=> true
> ActiveModel::Type::Boolean.new.cast(true)
=> true
> ActiveModel::Type::Boolean.new.cast(false)
=> false
```
This cast method gives you a handy way to handle all thsoe different cases.
This is available as of Rails 5+.