MongoEncodingError with Array

MongoDB Atlas App Services & Realm Atlas Device Sync
1

I have a collection which has an array defined in the schema (Realm App). It is NOT a required field…

“imageServiceIds”: {
“bsonType”: “array”,
“items”: {
“bsonType”: “string”
}
},

Some of my documents have imageServiceIds defined with an array of strings, some do not have it defined at all. In the realm logs, I am getting the following error for those documents that do not have the array defined.

Failed to convert MongoDB document with configured schema during initial sync…Detailed Error: field update at path { table: "Item", fullPath: "imageServiceIds" } should have been an array value but was object

I should also note the collection name is “items” but the schema has a title of “Item” (not sure if its an issue or not).

How should I handle this scenario? I know I can ensure the underlying document has the field defined with an empty array but this won’t help me in the future when I want to add another array field and all the existing documents do not have it defined.

Thanks

2

Assuming you’ve verified you created your validator correctly by taking a look at it in Compass, you are most likely are upserting something but not upserting an actual array. MongoDB tends to tell the truth, albeit in somewhat unhelpful terms.

3

Thank you very much. Compas was showing a value of undefined for the property (and error on my part in the way I imported the data). Not sure why the web ui didn’t display that undefined data but at least I found it and will now use Compas going forward.

1 Like
4

Good work @Robert_Charest