not silly at all, it's kind of an unfortunate situation w/ postgresql's naming, 
the name 'postgres' might be worth hardcoding somehwere as a universal "warn" 
kind of thing just so it doesn't skip silently



On Wed, May 12, 2021, at 11:45 AM, Michael Bukachi wrote:
> Typo alert. It's supposed to be `postgresql_where`. How silly of me.
> 
> On Wednesday, May 12, 2021 at 3:25:35 AM UTC+3 Michael Bukachi wrote:
>> 
>> Hi
>> 
>> I'm trying to setup unique partial indexes so that constraint violation is 
>> only thrown when a a certain column is true. This is the index I'm using:
>> 
>> __table_args__ = (
>>    Index(
>>      *"idx_one_active_fulfillment"*,
>>      member_id,
>>      status, 
>>      unique=True,
>>      postgres_where=(status == *'ACTIVE'*),
>>    ),
>> )
>> 
>> As long as the status is not 'ACTIVE', a member can have multiple entries i.e
>> member_id, status
>> 1, 'COMPLETED'
>> 1, 'COMPLETED'
>> 2, 'ACTIVE'
>> 
>> However, this is not the case. Once I insert an entry e.g 1, 'COMPLETED'; I 
>> can't insert it again since it throws an error of 'duplicate key value 
>> violates unique constraint'
>> 
>> The weird thing is that, if I run all the queries using psql, it works 
>> properly. Is there something I'm missing? I'm trying to see what 
>> `create_all` executes but it seems setting echo=True doesn't affect it.
>> 
>> Cheers.
> 

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