Thank you very much Jeremy
On Wed, Jun 22, 2016 at 11:39 PM Jeremy Evans <[email protected]>
wrote:
> On Tuesday, June 21, 2016 at 11:38:37 PM UTC-7, The Bang Nguyen wrote:
>>
>> Hi Jeremy,
>>
>> I remember that I did googling and find the way to use `self.|` in
>> `add_constraint`.
>>
>> For example:
>> alter_table(:table) do
>> add_constraint(:constraint) { self.|(:status => [1, 2, 3]) }
>> end
>> end
>>
>> Which will generate the constraint on status column of the table in which
>> status can only be 1,2 or 3.
>>
>> I try to find the document again in sequel documentation, however,
>> there's no luck.
>> If you can, could you please point me the way to find such documentation.
>>
>
>
> http://sequel.jeremyevans.net/rdoc/files/doc/virtual_rows_rdoc.html#label-Boolean+Operators
>
>
>> Is there the other way to generate such constraint which is more
>> readable? I found that it is a bit verbose though.
>>
>
> add_constraint(:constraint, :status => [1, 2, 3])
>
> There's no reason to use self.| with one argument, since all it does is
> put the OR between the arguments given.
>
> Thanks,
> Jeremy
>
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