On Sat, Apr 22, 2017 at 11:50 AM, Dwayne Crooks <[email protected]>
wrote:
> However, if I update the let bindings as follows:
>
> let
>> defaultViewConfig = Rating.defaultViewConfig
>> ratingViewConfig =
>> { defaultViewConfig | readOnly = model.readOnly }
>> in
>> ...
>
>
> Then, there is no error. Am I missing something or is this a bug in the
> parser?
>
> This is related to an active topic around record update syntax.
In short, currently it is not allowed to directly update nested records. ({
Rating.defaultViewConfig | readOnly = model.readOnly } is invalid syntax)
The temporary solution is the one you stumbled upon: creating an alias for
the nested record.
Another solution would be to use custom functions:
updateReadOnly : { a | readOnly : Bool } -> Bool -> a
updateReadOnly rec readOnly =
{ rec | readOnly = readOnly }
and then use it like:
ratingViewConfig =
updateReadOnly Rating.defaultViewConfig True
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