Add UpdateSet, Relaxed in client, Fix tests

update_set.go

@@ -0,0 +1,36 @@
+package mongo
+
+import (
+	"context"
+	
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// UpdateSet search documents using filter and updates the first it finds using the $set operator.
+func (c *MongoClient) UpdateSet(ctx context.Context, database, name string, filter, data bson.M) (bool, error) {
+	collection := c.GetCollection(database, name)
+
+	prepareForUpdateSet(data)
+
+	if err := c.DiscriminatorCheckAndApplyToFilter(ctx, name, filter); err != nil {
+		return  false, err
+	}
+
+	if err := c.DiscriminatorOmitInData(name, data); err != nil {
+		return  false, err
+	}
+	
+	update := bson.M{ "$set": data }
+	updateResult, err := collection.UpdateOne(ctx, filter, update)
+	if err != nil {
+		return false, err
+	}
+
+	changed := updateResult.ModifiedCount != 0
+
+	return changed, nil
+}
+
+func prepareForUpdateSet(data bson.M) {
+	ensureUpdatedAt(data)
+}