I am attempting to execute a PATCH update on a MongoDB document. I fetch the existing document using Mongoose in the following manner:
const ratePlan = await RatePlan.findOne({
_id: req.params.id,
})
The code snippets provided above work effectively in updating the model with the data from the HTTP request (req.body):
for (const [key, value] of Object.entries(req.body)) {
ratePlan[key] = value
}
await ratePlan.save()
// - OR -
await RatePlan.replaceOne(
{ _id: ratePlan._id },
{
...ratePlan.toObject(),
...req.body,
},
{
overwriteDiscriminatorKey: true,
runValidators: true,
},
)
However, the following code snippet fails to update a specific field that consists of an array of objects (it only updates string and numeric fields):
await RatePlan.updateOne({ _id: ratePlan._id }, req.body, {
overwriteDiscriminatorKey: true,
runValidators: true,
})
What could be the reason for updating some fields while neglecting others?
Note: The RatePlan model includes two discriminators, namely 'parent' and 'child', with the discriminatorKey set as 'kind'. The field that is not being updated is exclusively found in the 'parent' discriminator. The document undergoing the update also belongs to the 'parent' discriminator.