Just to follow up, pasted the gist here: http://pastebin.com/svhz2fHA

On Thursday, 22 August 2013 10:49:59 UTC+1, Adam Gamble wrote:
>
> Thanks Jeremy– Unions may be a good call, equally it'd be nice to have 
> just one 'Comment' table.. so to explain my situation I have a table 
> 'PhotoSet' and a 'Photo' table.. a user should be able to comment on a Set, 
> or a Photo –but for the purposes of the application the two should be 
> aggregated in a feed.
>
> As Photo's are many-to-one with the PhotoSet. I could have comments just 
> linked to the PhotoSet, where a comment *can* reference a Photo, 
> otherwise it becomes a general comment on the set.. make sense?
>
> Adam
>
> On Wednesday, 21 August 2013 16:41:14 UTC+1, Jeremy Evans wrote:
>>
>> On Wednesday, August 21, 2013 8:05:10 AM UTC-7, Adam Gamble wrote:
>>>
>>> Hi all,
>>>
>>> Just looking for some opinions on the following scenario, not very 
>>> experience with database design.. I have two tables (A, B) that both 
>>> require a comments column that would relate to a comments table (C).
>>>
>>> Presently it seems like I want two different comment tables (C.A, C.B) 
>>> to create the `one_to_many` `many_to_one` relationships in the Models. I 
>>> do, however, sometimes need to aggregate all comments.. is there a way to 
>>> implement this association in Sequel?
>>>
>>
>> Well, it really depends on your needs.  You can use separate tables, but 
>> then aggregation requires doing it in the application or using a UNION in 
>> SQL.
>>
>> You can always use a single comments table that both A and B reference, 
>> but this would allow rows from both A and B to reference the same comment.
>>
>> To provide more help you'd probably have to be more specific, by posting 
>> your proposed schema and exactly what types of associations you want.
>>
>> Thanks,
>> Jeremy
>>
>

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