php - Checking to see if a conversation already exists Laravel -

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hey guys i'm building eloquent query see conversation array of participants exists. reason can't have same conversation same participants created more once.

here's eloquent query:

$convos = conversation::wherehas('participant', function ($query) use ($participantids) {                         $query->wherein('user_id', $participantids)                         ->groupby('convo_id')                         ->havingraw('count(convo_id)='.count($participantids));            })->get();

$participantids equal [1, 2] or [1, 2, 3] example.

how check if conversation exists id's in $participantids? above query return conversation has any of participants in array

so if have conversation john (2) , matt (4) try make conversation me , john query show have conversation john already


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