On 9 March 2016 at 22:25, David Williams <li...@ruby-forum.com> wrote:
> Colin Law wrote in post #1182073:
>> On 9 March 2016 at 21:51, David Williams <li...@ruby-forum.com> wrote:
>>> "articles"."category_id" = ? ORDER BY "articles"."created_at" DESC
>>> [["category_id", 1]]
>>>
>>>
>>> I'm getting undefined method `each' for #<Article:0x8300868>
>>
>> That is because you only have a single Article, not a collection, see
>> above.
>>
>> Colin
>
> Thanks for responding Colin, I didn't realize .last would lead to a
> single article being queried. I thought it would give me the last 10
> records. I guess DESC being my default named_scope: default_scope -> {
> order(created_at: :desc) } should take care of that for me. Thanks.
The limit(10) gives you the first ten records, but since you have
ordered descending that means you will get the ten with the highest
created_at. Although default_scope sounds like a good idea I have
several times used it only to find that it causes confusion and now
avoid it. Preferring to explicitly specify the order whenever it
matters (via named scopes if appropriate).
Colin
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