I'm using a filter similar to the following and running into an error "Cast to date failed for value \"{ '': 2019-01-01T00:00:00.000Z }\" at path \"beginsAt\" for model \"Event\"".
filter: {
_operators: { beginsAt: { gte: "2019-01-01T00:00:00.000Z" } }
}
It seems related to how the _toMongoDottedObject function builds up the query conditions.
I have a failing test that I'll submit as a PR.