MongoDB CRUD in Laravel: Syntax for performing CRUD operations

1. Connecting to MongoDB

Before performing any CRUD operations in MongoDB using Laravel, you need to establish a connection to the MongoDB server. Laravel provides a built-in MongoDB library called «jenssegers/mongodb» that makes it easy to connect to MongoDB.

To connect to MongoDB, you need to install the «jenssegers/mongodb» package using Composer. Open your terminal and run the following command:

composer require jenssegers/mongodb

Once the package is installed, you need to configure the MongoDB connection in your Laravel application. Open the config/database.php file and add the following code to the connections array:

'mongodb' => [
    'driver'   => 'mongodb',
    'host'     => env('DB_HOST', 'localhost'),
    'port'     => env('DB_PORT', 27017),
    'database' => env('DB_DATABASE', 'your_database'),
    'username' => env('DB_USERNAME', 'your_username'),
    'password' => env('DB_PASSWORD', 'your_password'),
    'options'  => [
        'database' => 'admin' // sets the authentication database required by mongo 3
    ]
],

Make sure to replace your_database, your_username, and your_password with your actual MongoDB database name, username, and password.

Once the connection is configured, you can use the following syntax to connect to MongoDB:

$connection = DB::connection('mongodb');

Now that you are connected to MongoDB, you can perform CRUD operations on your MongoDB collections.

2. Creating a new document

To create a new document in MongoDB using Laravel, you can use the insert method provided by the MongoDB library. The insert method takes an array of key-value pairs representing the fields and values of the document.

Here is the syntax for creating a new document:

$collection = $connection->collection('your_collection');
$document = [
    'field1' => 'value1',
    'field2' => 'value2',
    // add more fields as needed
];
$collection->insert($document);

Make sure to replace your_collection with the name of your MongoDB collection.

After executing the above code, a new document will be created in the specified collection with the provided fields and values.

3. Reading documents

To read documents from MongoDB using Laravel, you can use the find method provided by the MongoDB library. The find method returns a cursor object that you can iterate over to access the documents.

Here is the syntax for reading documents:

$collection = $connection->collection('your_collection');
$documents = $collection->find();
foreach ($documents as $document) {
    // access the fields of the document
    $field1 = $document['field1'];
    $field2 = $document['field2'];
    // do something with the fields
}

Make sure to replace your_collection with the name of your MongoDB collection.

The above code retrieves all the documents from the specified collection and iterates over them using a foreach loop. Inside the loop, you can access the fields of each document using array notation.

4. Updating documents

To update documents in MongoDB using Laravel, you can use the update method provided by the MongoDB library. The update method takes two parameters: a query to match the documents to be updated, and an array of key-value pairs representing the fields and values to be updated.

Here is the syntax for updating documents:

$collection = $connection->collection('your_collection');
$query = ['field1' => 'value1']; // specify the query to match the documents
$update = ['$set' => ['field2' => 'new_value']]; // specify the fields and values to be updated
$collection->update($query, $update);

Make sure to replace your_collection, field1, value1, field2, and new_value with the appropriate values for your use case.

The above code updates the documents in the specified collection that match the provided query. It sets the value of field2 to new_value for the matched documents.

5. Deleting documents

To delete documents from MongoDB using Laravel, you can use the delete method provided by the MongoDB library. The delete method takes a query to match the documents to be deleted.

Here is the syntax for deleting documents:

$collection = $connection->collection('your_collection');
$query = ['field1' => 'value1']; // specify the query to match the documents
$collection->delete($query);

Make sure to replace your_collection, field1, and value1 with the appropriate values for your use case.

The above code deletes the documents from the specified collection that match the provided query.

That’s it! You now have the syntax for performing CRUD operations in MongoDB using Laravel. You can use these syntax examples as a starting point and customize them to fit your specific needs.