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mongox-go-driver/mongox/common/count.go

31 lines
944 B

package common
import (
"github.com/mainnika/mongox-go-driver/mongox"
"github.com/mainnika/mongox-go-driver/mongox/errors"
"github.com/mainnika/mongox-go-driver/mongox/query"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// Count function counts documents in the database by query
// target is used only to get collection by tag so it'd be better to use nil ptr here
func Count(db *mongox.Database, target interface{}, filters ...interface{}) (int64, error) {
collection := db.GetCollectionOf(target)
opts := options.Count()
composed := query.Compose(filters...)
opts.Limit = composed.Limiter()
opts.Skip = composed.Skipper()
result, err := collection.CountDocuments(db.Context(), composed.M(), opts)
if err == mongo.ErrNoDocuments {
return 0, errors.NotFoundErrorf("%s", err)
}
if err != nil {
return 0, errors.InternalErrorf("can't decode desult: %s", err)
}
return result, nil
}