How to get MongoDB entries in date range including limits? - mongodb

Question

In a Mongo DB, I have the below entries:
> db.DomainObjects.find()
// [...]
{ "_id" : ObjectId("6..3"), "lev" : 7, "date" : ISODate("2021-02-01T00:00:00Z"), "val" : 29.1 }
{ "_id" : ObjectId("6..4"), "lev" : 7, "date" : ISODate("2021-02-02T00:00:00Z"), "val" : 20.3 }
{ "_id" : ObjectId("6..5"), "lev" : 7, "date" : ISODate("2021-02-05T00:00:00Z"), "val" : 15.8 }
// [...]
In a ASP.NET Core Service class, I have a reference to the collection using the Mongo DB driver with the below version installed:
Here is how the reference is created:
public DomainService(IDomainDatabaseSettings settings)
{
var client = new MongoClient(settings.ConnectionString);
var database = client.GetDatabase(settings.DatabaseName);
_repo = database.GetCollection<Domain>(settings.DomainCollectionName);
}
Then I'd like to get the entries by DateTime range (including the limits) using the following method:
public List<Domain> Get(int lev, DateTime dateFrom, DateTime dateTo) {
Expression<Func<Domain, bool>> expr = entry => (entry.lev == lev) &&
(entry.date.CompareTo(dateFrom) >= 0) &&
(entry.date.CompareTo(dateTo) <= 0);
return _repo.Find(expr).ToList();
I use the following GET request:
https://localhost:45645/api/DomainObjects/7/?dateFrom=2021-02-01&dateTo=2021-02-02
However, I only get the entries starting and including the lower limit, the entry on the upper limit is excluded.
For completeness, the controller is this:
[HttpGet("{lev:int}")]
public ActionResult<List<Domain>> Get(int lev, [FromQuery] DateTime? dateFrom = null, [FromQuery] DateTime? dateTo = null) {
if (!dateFrom.HasValue) {
dateFrom = DateTime.MinValue;
return _domainService.Get(lev, (DateTime) dateFrom, (DateTime) dateTo);
}
if (!dateTo.HasValue) {
dateTo = DateTime.Today;
return _domainService.Get(lev, (DateTime) dateFrom, (DateTime) dateTo);
}
return _domainService.Get(lev, (DateTime) dateFrom, (DateTime) dateTo);
}
If the lower limit dateFrom is omitted in the request, it should start with the earliest entry, if the limit dateTo is omitted, it should return all values from dateFrom up until and including today.