mongodb project all fields
db.collection.aggregate([
{ "$addFields": { "custom_field": "$obj.obj_field1" } }
])mongodb project all fields
db.collection.aggregate([
{ "$addFields": { "custom_field": "$obj.obj_field1" } }
])mongodb project
{ $project: { "contact.address.country": 1, contact: 1 } }project mongodb c#
int count = 1;
await collection.Find(FilterDefinition<Student>.Empty)
.Project(x => new {x.FirstName, x.LastName})
.ForEachAsync(
student =>
{
Console.WriteLine($"{count}. t FirstName: {student.FirstName} - LastName {student.LastName}");
count++;
});
Console.WriteLine();$project mongodb
{ $project: { "<field1>": 0, "<field2>": 0, ... } } // Return all but the specified fieldsCopyright © 2021 Codeinu
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