mongodb export entire database

To export an entire MongoDB database using Go, you can follow these steps:

1. Import the required packages:

import (
    "context"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

• The context package is used to handle cancellation signals and timeouts.
• The go.mongodb.org/mongo-driver/mongo package provides the MongoDB driver for Go.

• The go.mongodb.org/mongo-driver/mongo/options package provides options for connecting to MongoDB.

• Create a MongoDB client:

clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")
client, err := mongo.Connect(context.TODO(), clientOptions)
if err != nil {
    // handle error
}

• The options.Client().ApplyURI method sets the MongoDB URI to connect to the database.

• The mongo.Connect function establishes a connection to the MongoDB server using the provided client options.

• Access the database and collection:

database := client.Database("your_database_name")
collection := database.Collection("your_collection_name")

• client.Database returns a handle to the specified database.

• database.Collection returns a handle to the specified collection within the database.

• Retrieve all documents from the collection:

cursor, err := collection.Find(context.TODO(), bson.D{})
if err != nil {
    // handle error
}
defer cursor.Close(context.TODO())

• The collection.Find method retrieves all documents from the collection.
• bson.D{} is an empty filter that matches all documents in the collection.

• The cursor object represents the result set and allows you to iterate over the documents.

• Iterate over the documents and export them:

for cursor.Next(context.TODO()) {
    var document bson.M
    err := cursor.Decode(&document)
    if err != nil {
        // handle error
    }
    // Export or process the document here
}
if err := cursor.Err(); err != nil {
    // handle error
}

• The cursor.Next method moves the cursor to the next document in the result set.
• The cursor.Decode method decodes the document into a bson.M map.

• You can then export or process the document as needed.

• Close the connection:

err = client.Disconnect(context.TODO())
if err != nil {
    // handle error
}

• The client.Disconnect function closes the connection to the MongoDB server.

By following these steps, you can export an entire MongoDB database using Go.