Receive exception Cannot do an empty bulk write message, when attempting a bulk write. about mongo-php-adapter HOT 4 CLOSED

Thanks for the report. Could you provide the parameters given to the MongoCollection::update call? Normally the update method checks the first operator in the $newObj parameter to see if it's an update operator (e.g. starts with a '$' sign). If so, it is considered an update and triggers a call to updateOne or udpateMany, in other cases it calls replaceOne on the underlying connection. Not sure where it goes wrong.

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Created a failing unit test in this PR #102

below are the params for the update call

array:1 [
  "_id" => MongoId {#16031
    -objectID: MongoDB\BSON\ObjectID {#16032}
  }
]

array:52 [
  "allowCredits" => true
  "attributeValueImageMap" => []
  "buyWithMeMode" => "i"
   ...
]

array:2 [
  "upsert" => true
  "w" => 1
]

from mongo-php-adapter.

After some investigation I've found this is an issue either in the MongoDB driver or MongoDB itself. The problem is with the product reference:

'product' => [
    'type' => 'simple',
    '$ref' => 'products',
    '$id' => new \MongoId(),
],

Once the type field is moved to the bottom of the array this works:

'product' => [
    '$ref' => 'products',
    '$id' => new \MongoId(),
    'type' => 'simple',
],

I've reported this in mongo-php-library to have the MongoDB team investigate the behavior as this error only occurs in replace operations, not in update operations.

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@ccovey according to this comment the issue seems to occur due to a malformed DBRef object. Can you confirm this and close the ticket if this is the case? Thanks!

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