The $pull functionality of Waterline ODM used to query and update a MongoDB database

The Waterline feature of Sails allows you to designate an entity's attribute as an 'array' type:

module.exports = {
  attributes: {
    items: { type: 'array' }
  }  
}

In MongoDB, the $pull operator is available for update queries, enabling the removal of specific values from array attributes in multiple documents with a single query. Despite my research, I have not come across any solution within Waterline that offers similar functionality. Has anyone discovered a workaround or solution to this issue? Thank you in advance.

node.jsmongodbsails.jswaterline

Answer №1

After encountering the issue, I found a solution that works well for me. Given my reliance on mongodb for other database operations, I needed to make sure the connection was established correctly. In this case, let's say I have a 'Product' database model with an array attribute called 'items'. The connection for this specific model should be directed towards mongodb:

Product.native(function (err, collection) {
  //handle any errors
  collection.update(updatedObjects, {
    $pull: { items: itemToRemove }
  }, function (err, result) {
    //execute callback function, etc.
  });
});

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