FireDAC.Phys.MongoDBWrapper.TMongoCollection.Count
Delphi
function Count(AQuery: TMongoQuery; AFlags: TMongoQueryFlags = []): Int64; overload;
function Count(AFlags: TMongoQueryFlags = []): TMongoQuery; overload;
C++
__int64 __fastcall Count(TMongoQuery* AQuery, TMongoQueryFlags AFlags = TMongoQueryFlags() )/* overload */;
TMongoQuery* __fastcall Count(TMongoQueryFlags AFlags = TMongoQueryFlags() )/* overload */;
Contents
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | FireDAC.Phys.MongoDBWrapper.pas FireDAC.Phys.MongoDBWrapper.hpp |
FireDAC.Phys.MongoDBWrapper | TMongoCollection |
Description
Returns the number of documents of the collection that match the specified query.
Count supports two different coding styles.
You can optionally specify a set of query flags.
Example
The following example obtains the number of Italian restaurants in the 10075 zip code.
MongDB shell:
db.restaurants.count({ cuisine: "Italian", "address.zipcode": "10075" })
Delphi:
Count := MyCollection.Count
.Match
.Add('cuisine', 'Italian')
.Add('address.zipcode', '10075')
.&End
.Value;
C++:
int Count = MyCollection->Count()
->Match()
->Add("cuisine", String("Italian"))
->Add("address.zipcode", String("10075"))
->End()
->Value();