writing filter in loopback - node.js

Question

I'm trying to write a loopback 4 filter that returns the objects where creatorId = userId OR userId in sharedUsers = userId but I cant seem to formulate the filter correctly
(neither of these properties are unique id's)
this is what my object shape looks like:
{
"_id" : "20",
"configMetadata" : {
...
"creatorId" : "50",
"creatorName" : "Mark"
},
"sharedUsers" : [
{
"userId" : "15"
},
{
"userId" : "20"
}
],
"sharedRoles" : ....,
"tiles" : ...
}
here is what I tried
const filter2: Filter<ProductViewConfig> =
{
where: {
or: [
{ configMetadata : { creatorId : userId} },
{ sharedUsers: { [userId]: userId } },
],
},
};
but I'm getting 2 errors: one is : configMetadata is missing the rest of the properties, so just properties mismatch and for sharedUsers I'm getting a MongoError: unknown operator: $15 when I enter userId = 15
to provide context: this is what my endpoint looks like
#get('/product-view-configs/{userId}')
#response(200, {
description: 'ProductViewConfig model instance',
content: {
'application/json': {
schema: getModelSchemaRef(ProductViewConfig),
},
},
})
async findIt(
#param.path.string('userId') userId: string,
#param.filter(ProductViewConfig, { exclude: 'where' }) filter?: FilterExcludingWhere<ProductViewConfig>
): Promise<ProductViewConfig> {
//returns configs where creatorId = userId OR userId in sharedUsers = userId
const filter2: Filter<ProductViewConfig> =
{
where: {
or: [
{ configMetadata : { creatorId : userId} },
{ sharedUsers: { [userId]: userId } },
],
},
};
const records = this.productViewConfigRepository.find(filter2);
return this.productViewConfigRepository.findById(userId, filter);
}
can anyone point me in the right direction? I couldn't find examples on how to filter nested objects in the documentation, so any help would be appreciated!