/
mongo.go
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/
mongo.go
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// Description: helper to connect and setup mongo DB
/*
* Copyright (c) 2023. Monimoto Authors.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package db
import (
"context"
"fmt"
"time"
log "github.com/sirupsen/logrus"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// ConnectToMongo helper to connect and setup mongo DB
func ConnectToMongo(dbName string, connectURL string) *mongo.Database {
log.Printf("connecting to MongoDB: %s", connectURL)
// Create MongoDB client
opts := options.Client().ApplyURI(connectURL)
opts.SetServerSelectionTimeout(10 * time.Second)
client, err := mongo.NewClient(opts)
if err != nil {
log.Fatalf("failed to create new MongoDB client: %#v", err)
}
// Connect client
if err = client.Connect(context.Background()); err != nil {
log.Fatalf("failed to connect to MongoDB: %#v", err)
}
err = client.Ping(context.Background(), nil)
if err != nil {
log.Fatalf("failed to ping MongoDB: %#v", err)
}
log.Info("mongo connection established")
// Get collection from database
return client.Database(dbName)
}
// Truncate collection records and indexes
func Truncate(col *mongo.Collection, dropIndexes bool) error {
_, err := col.DeleteMany(context.Background(), bson.M{})
if err != nil {
return fmt.Errorf("truncate failed to delete all docs from %s: %w", col.Name(), err)
}
if dropIndexes {
_, err = col.Indexes().DropAll(context.Background(), nil)
if err != nil {
return fmt.Errorf("truncate failed to drop indexes on %s: %w", col.Name(), err)
}
}
return nil
}