This reminds me of another recent
topic:
https://groups.google.com/forum/?fromgroups#!topic/rubyonrails-core/wAkJbUb3mio
They're discussing the idea of adding a presence scope with
`Person.where.present(:name)`
If this method also checks for the presence of associated records like
`Person.where.present(:parent)` then it would make sense to also have a
method that does the opposite (like you're proposing).
Or perhaps it would simply make more sense to instead use
`Person.where.not.present(:parent)`.
On Monday, December 10, 2018 at 7:55:51 PM UTC-6, John Pollard wrote:
>
> I definitely find myself looking for orphans to clean up my database. What
> about adding a method scope as "missing_#{relationship_name}"
>
> Book.missing_author #without a parent
>
> Author.missing_books #without children
>
>
> On Tuesday, November 27, 2018 at 5:41:53 PM UTC-5, Tom Rossi wrote:
>>
>> Its common for me to look for orphans and I typically do it like this:
>>
>> Child.eager_load(:parent).where(parents: { id: nil })
>>
>> I would like to propose putting together a PR for something like this:
>>
>> Child.missing(:parent)
>> Parent.missing(:children)
>>
>> Please let me know if others are interested in the functionality and I
>> would love to give it a shot!
>>
>
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