README

Laravel DynamoDB

This package is a fork from the original package by Bao Pham.

For advanced users only. If you're not familiar with Laravel, Laravel Eloquent and DynamoDB, then I suggest that you get familiar with those first.

Laravel DynamoDB
Install
Install (for Lumen)
Usage
- Extend your Model
- Add Trait to Model (to Sync)
Query Builder
AWS SDK
Supported features
Indexes
Composite Keys
Query Builder
FAQ
- Security
- Credits
- License

Install

Install the package using Composer:

$ composer require rennokki/dynamodb

If your Laravel package does not support auto-discovery, add this to your config/app.php file:

'providers' => [
    ...
    Rennokki\DynamoDb\DynamoDbServiceProvider::class,
    ...****
];

Publish the config files.

php artisan vendor:publish

Install (for Lumen)

For Lumen, try this to install the vendor:publish command and load configuration file and enable Eloquent support in bootstrap/app.php:

$app = new Laravel\Lumen\Application(
    realpath(__DIR__.'/../')
);

// Load dynamodb config file
$app->configure('dynamodb');

// Enable Eloquent support
$app->withEloquent();

Usage

Extend your Model

Extend your model with Rennokki\DynamoDb\DynamoDbModel, then you can use Eloquent methods that are supported. The idea here is that you can switch back to Eloquent without changing your queries.

use Rennokki\DynamoDb\DynamoDbModel;

class MyModel extends DynamoDbModel
{
    //
}

Add Trait to Model (to Sync)

To sync your DB table with a DynamoDb table, use trait Rennokki\DynamoDb\ModelTrait. This trait will call a PutItem after the model is saved, update or deleted.

use Rennokki\DynamoDb\ModelTrait as DynamoDbable;

class MyModel extends Model
{
    use DynamoDbable;
}

Query Builder

You can use the query builder facade to build more complex queries.

AWS SDK

AWS SDK v3 for PHP uses guzzlehttp promises to allow for asynchronous workflows. Using this package you can run eloquent queries like delete, update, save asynchronously on DynamoDb.

Supported features

find() and delete()

$model->find($id, array $columns = []);
$model->findMany($ids, array $columns = []);

$model->delete();
$model->deleteAsync()->wait();

Conditions

// Using getIterator()
// If 'key' is the primary key or a global/local index and it is a supported Query condition,
// will use 'Query', otherwise 'Scan'.
$model->where('key', 'key value')->get();

$model->where(['key' => 'key value']);

// Chainable for 'AND'.
$model->where('foo', 'bar')
    ->where('foo2', '!=' 'bar2')
    ->get();

// Chainable for 'OR'.
$model->where('foo', 'bar')
    ->orWhere('foo2', '!=' 'bar2')
    ->get();

// Other types of conditions
$model->where('count', '>', 0)->get();
$model->where('count', '>=', 0)->get();
$model->where('count', '<', 0)->get();
$model->where('count', '<=', 0)->get();
$model->whereIn('count', [0, 100])->get();
$model->whereNotIn('count', [0, 100])->get();
$model->where('count', 'between', [0, 100])->get();
$model->where('description', 'begins_with', 'foo')->get();
$model->where('description', 'contains', 'foo')->get();
$model->where('description', 'not_contains', 'foo')->get();

// Nested conditions
$model
    ->where('name', 'foo')
    ->where(function ($query) {
        return $query
            ->where('count', 10)
            ->orWhere('count', 20);
    })->get();

// Nested attributes
$model->where('nestedMap.foo', 'bar')->where('list[0]', 'baz')->get();

whereNull() and whereNotNull()

NULL and NOT_NULL only check for the attribute presence not its value being null Please see: http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Condition.html

$model->whereNull('name');
$model->whereNotNull('name');

all() and first()

// Using scan operator, not too reliable since DynamoDb will only give 1MB total of data.
$model->all();

// Basically a scan but with limit of 1 item.
$model->first();

Pagination

Unfortunately, offset of how many records to skip does not make sense for DynamoDb. Instead, provide the last result of the previous query as the starting point for the next query.

Examples:

For query such as the following:

$query = $model->where('count', 10)->limit(2);
$items = $query->all();
$last = $items->last();

Take the last item of this query result as the next "offset":

$nextPage = $query->after($last)->limit(2)->all();

// or
$nextPage = $query->afterKey($items->lastKey())->limit(2)->all();

// or (for query without index condition only)
$nextPage = $query->afterKey($last->getKeys())->limit(2)->all();

update()

$model->update($attributes);

updateAsync()

// update asynchronously and wait on the promise for completion.
$model->updateAsync($attributes)->wait();

save()

$model = new Model();
// Define fillable attributes in your Model class.
$model->fillableAttr1 = 'foo';
$model->fillableAttr2 = 'foo';

// DynamoDb doesn't support incremented Id, so you need to use UUID for the primary key.
$model->id = 'de305d54-75b4-431b-adb2-eb6b9e546014';
$model->save();

saveAsync()

Saving single model asynchronously and waiting on the promise for completion.

$model = new Model;

// Define fillable attributes in your Model class.
$model->fillableAttr1 = 'foo';
$model->fillableAttr2 = 'bar';

// DynamoDb doesn't support incremented Id, so you need to use UUID for the primary key.
$model->id = 'de305d54-75b4-431b-adb2-eb6b9e546014';
$model->saveAsync()->wait();

Saving multiple models asynchronously and waiting on all of them simultaneously.

for ($i = 0; $i < 10; $i++) {
    $model = new Model;

    // Define fillable attributes in your Model class.
    $model->fillableAttr1 = 'foo';
    $model->fillableAttr2 = 'bar';

    // DynamoDb doesn't support incremented Id, so you need to use UUID for the primary key.
    $model->id = uniqid();

    // Returns a promise which you can wait on later.
    $promises[] = $model->saveAsync();
}

\GuzzleHttp\Promise\all($promises)->wait();

delete()

$model->delete();

deleteAsync()

$model->deleteAsync()->wait();

chunk()

$model->chunk(10, function ($records) {
    foreach ($records as $record) {
        //
    }
});

limit() and take()

// Use this with caution unless your limit is small.
// DynamoDB has a limit of 1MB so if your limit is very big, the results will not be expected.
$model->where('name', 'foo')->take(3)->get();

firstOrFail()

$model->where('name', 'foo')->firstOrFail();

// for composite key
$model->where('id', 'foo')->where('id2', 'bar')->firstOrFail();

findOrFail()

$model->findOrFail('foo');

// for composite key
$model->findOrFail(['id' => 'foo', 'id2' => 'bar']);

refresh()

$model = Model::first();
$model->refresh();

getItemsCount()

// returns the approximate total count of the table items
$total = Model::getItemsCount(); // ex: 5

Query Scope

class Foo extends DynamoDbModel
{
    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope('count', function (DynamoDbQueryBuilder $builder) {
            $builder->where('count', '>', 6);
        });
    }

    public function scopeCountUnderFour($builder)
    {
        return $builder->where('count', '<', 4);
    }

    public function scopeCountUnder($builder, $count)
    {
        return $builder->where('count', '<', $count);
    }
}

$foo = new Foo();

// Global scope will be applied
$foo->all();

// Local scope
$foo->withoutGlobalScopes()->countUnderFour()->get();

// Dynamic local scope
$foo->withoutGlobalScopes()->countUnder(6)->get();

REMOVE — Deleting Attributes From An Item

Please see: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.UpdateExpressions.html#Expressions.UpdateExpressions.REMOVE

$model = new Model();
$model->where('id', 'foo')->removeAttribute('name', 'description', 'nested.foo', 'nestedArray[0]');

// Equivalent of:
Model::find('foo')->removeAttribute('name', 'description', 'nested.foo', 'nestedArray[0]');

toSql()

For debugging purposes, you can choose to convert to the actual DynamoDb query

$raw = $model->where('count', '>', 10)->toDynamoDbQuery();

// $op is either "Scan" or "Query"
$op = $raw->op;

// The query body being sent to AWS
$query = $raw->query;

The $raw variable is an instance of RawDynamoDbQuery

Decorate Query

Use decorate when you want to enhance the query.

To set the order of the sort key:

$items = $model
    ->where('hash', 'hash-value')
    ->where('range', '>', 10)
    ->decorate(function (RawDynamoDbQuery $raw) {
        // desc order
        $raw->query['ScanIndexForward'] = false;
    })->get();

To force to use "Query" instead of "Scan" if the library fails to detect the correct operation:

$items = $model
    ->where('hash', 'hash-value')
    ->decorate(function (RawDynamoDbQuery $raw) {
        $raw->op = 'Query';
    })->get();

Indexes

If your table has indexes, make sure to declare them in your model class like so

/**
 * The DynamoDb indexes.
 * [
 *     '<simple_index_name>' => [
 *          'hash' => '<index_key>'
 *     ],
 *     '<composite_index_name>' => [
 *          'hash' => '<index_hash_key>',
 *          'range' => '<index_range_key>'
 *     ],
 * ]
 *
 * @var array
 */
protected $dynamoDbIndexKeys = [
    'count_index' => [
        'hash' => 'count'
    ],
];

Note that order of index matters when a key exists in multiple indexes.

For example, for the following query, count_index will be used:

$model->where('user_id', 123)->where('count', '>', 10)->get();

protected $dynamoDbIndexKeys = [
    'count_index' => [
        'hash' => 'user_id',
        'range' => 'count'
    ],
    'user_index' => [
        'hash' => 'user_id',
    ],
];

Most of the time, you should not have to do anything but if you need to use a specific index, you can specify it like so

$model
    ->where('user_id', 123)
    ->where('count', '>', 10)
    ->withIndex('count_index')
    ->get();

Composite Keys

To use composite keys with your model:

Set $compositeKey to an array of the attributes names comprising the key, e.g.

protected $primaryKey = 'customer_id';
protected $compositeKey = ['customer_id', 'agent_id'];

To find a record with a composite key:

$model->find(['customer_id' => 'value1', 'agent_id' => 'value2']);

Query Builder

Use DynamoDb facade to build raw queries.

use Rennokki\DynamoDb\Facades\DynamoDb;

DynamoDb::table('articles')
    // call set<key_name> to build the query body to be sent to AWS
    ->setFilterExpression('#name = :name')
    ->setExpressionAttributeNames(['#name' => 'author_name'])
    ->setExpressionAttributeValues([':name' => DynamoDb::marshalValue('Bao')])
    ->prepare()
    // the query body will be sent upon calling this.
    ->scan(); // supports any DynamoDbClient methods (e.g. batchWriteItem, batchGetItem, etc.)

DynamoDb::table('articles')
    ->setIndex('author_name')
    ->setKeyConditionExpression('#name = :name')
    ->setProjectionExpression('id, author_name')
    // Can set the attribute mapping one by one instead
    ->setExpressionAttributeName('#name', 'author_name')
    ->setExpressionAttributeValue(':name', DynamoDb::marshalValue('Bao'))
    ->prepare()
    ->query();

DynamoDb::table('articles')
    ->setKey(DynamoDb::marshalItem(['id' => 'ae025ed8']))
    ->setUpdateExpression('REMOVE #c, #t')
    ->setExpressionAttributeName('#c', 'comments')
    ->setExpressionAttributeName('#t', 'tags')
    ->prepare()
    ->updateItem();

DynamoDb::table('articles')
    ->setKey(DynamoDb::marshalItem(['id' => 'ae025ed8']))
    ->prepare()
    ->deleteItem();

DynamoDb::table('articles')
    ->setItem(
        DynamoDb::marshalItem(['id' => 'ae025ed8', 'author_name' => 'New Name'])
    )
    ->prepare()
    ->putItem();

// Or, instead of ::table()
DynamoDb::newQuery()
    ->setTableName('articles')

// Or access the DynamoDbClient instance directly
DynamoDb::client();

// pass in the connection name to get a different client instance other than the default.
DynamoDb::client('test');

The query builder methods are in the form of set<key_name>, where <key_name> is the key name of the query body to be sent.

For example, to build an UpdateTable query:

[
    'AttributeDefinitions' => ...,
    'GlobalSecondaryIndexUpdates' => ...,
    'TableName' => ...
]

Do:

$query = DynamoDb::table('articles')
    ->setAttributeDefinitions(...)
    ->setGlobalSecondaryIndexUpdates(...);

And when ready:

$query->prepare()->updateTable();

FAQ

Q: Cannot assign id property if its not in the fillable array A: Try this?

Q: How to create migration? A: Please see this issue

Q: How to use with factory? A: Please see this issue

Q: How do I use with Job? Getting a SerializesModels error A: You can either write your own restoreModel or remove the SerializesModels trait from your Job.

Security

If you discover any security related issues, please email alex@renoki.org instead of using the issue tracker.

Credits

License

The MIT License (MIT). Please see License File for more information.

rennokki / dynamodb

Maintainers

Details

README

Laravel DynamoDB

Install

Install (for Lumen)

Usage

Extend your Model

Add Trait to Model (to Sync)

Query Builder

AWS SDK

Supported features

find() and delete()

Conditions

whereNull() and whereNotNull()

all() and first()

Pagination

update()

updateAsync()

save()

saveAsync()

delete()

deleteAsync()

chunk()

limit() and take()

firstOrFail()

findOrFail()

refresh()

getItemsCount()

Query Scope

REMOVE — Deleting Attributes From An Item

toSql()

Decorate Query

Indexes

Composite Keys

Query Builder

FAQ

Security

Credits

License