John Siracusa wrote:
> On 6/14/07, Derek Watson <[EMAIL PROTECTED]> wrote:
>> 1. A fatal error is thrown when the object count is zero. I believe
>> this is happening around line 2749 of MakeMethods::Generic:
>>
>> $count =
>> $ft_manager->$ft_count_method(query => [EMAIL PROTECTED], db =>
>> $self->db, %args)
>> or die $ft_manager->error;
>>
>> Which dies because $count is assigned zero, making the statement
>> evaluate false.
>
> Whoops, careless copy/paste. That's fixed in SVN now.
>
>> 2. If I am counting objects related by a many-to-many where the
>> mapping table has a multi-valued primary key, the query generated is
>> something like
>>
>> SELECT
>> COUNT(DISTINCT t1.a_id, t1.b_id)
>> FROM
>> a_b_map t1
>> JOIN b t2 ON (t1.b_id = t2.id)
>> WHERE
>> t1.a_id=xxx
>>
>> But Postgres says
>>
>> ERROR: function count(integer, integer) does not exist at character 9
>
> Hm, what is the correct SQL in that case for Postgres?
Subselect?
SELECT count(*)
FROM (
SELECT DISTINCT a_id, b_id
FROM a_b_map
WHERE a_id = xxx
) s
;
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