1.2.1. Usage

You can write your persistence model classes by hand, but it's going to be tedious to do so. Instead, use the ./vendor/bin/atlas-skeleton command to read the table information from the database and generate them for you.

1.2.1.1. Configure Connection

First, create a PHP file to return an array of configuration parameters for skeleton generation. Provide an array of PDO connection arguments, a string for the namespace prefix, and a directory to write the classes to:

// /path/to/skeleton-config.php
return [
    'pdo' => [
        'mysql:dbname=testdb;host=localhost',
        'username',
        'password',
    ],
    'namespace' => 'App\\DataSource',
    'directory' => './src/App/DataSource',
];

Tip:

If you happen to have a generic config file for other purposes, you can nest the Atlas configuration values inside that array. For example:

// /path/to/settings.php
return [
    'foo' => [
        'bar' => [
            'atlas' => [
                'pdo' => [
                    'mysql:dbname=testdb;host=localhost',
                    'username',
                    'password',
                ],
                'namespace' => 'App\\DataSource',
                'directory' => './src/App/DataSource',
            ],
        ],
    ],
];

1.2.1.2. Generate Classes

You can then invoke the skeleton generator using that config file:

php ./vendor/bin/atlas-skeleton.php /path/to/skeleton-config.php

Tip:

If you nested the Atlas keys inside the config file, pass the dot-separated names of the array elements leading to the Atlas configuration array as an argument immediately after the file path.

For example, given the above array of ['foo']['bar']['atlas']:

php ./vendor/bin/atlas-skeleton.php /path/to/settings.php foo.bar.atlas

Doing so will read every table in the database and create one DataSource directory for each of them, each with several classes:

App
└── DataSource
    └── Thread
        ├── Thread.php                  # mapper
        ├── ThreadEvents.php            # mapper-level events
        ├── ThreadFields.php            # trait with property names
        ├── ThreadRecord.php            # single record
        ├── ThreadRecordSet.php         # record collection
        ├── ThreadRelationships.php     # relationship definitions
        ├── ThreadRow.php               # table row
        ├── ThreadSelect.php            # mapper-level query object
        ├── ThreadTable.php             # table defintion and interactions
        ├── ThreadTableEvents.php       # table-level events
        ├── ThreadTableSelect.php       # table-level query object

Most of these classes will be empty, and are provided so you can extend their behavior if you wish. They also serve to assist IDEs with autocompletion of return typehints.

Warning:

If you run the skeleton generator more than once, the following classes will be OVERWRITTEN and you will lose any changes to them:

  • {TYPE}Fields.php
  • {TYPE}Row.php
  • {TYPE}Table.php

The remaining classes will remain untouched.

1.2.1.3. Custom Transformations

If you are unsatisfied with how the skeleton generator transforms table names to persistence model type names, you can instantiate the Transform class in the config file under the transform key, and pass an array of table-to-type names to override the default transformations:

// /path/to/skeleton-config.php
return [
    'pdo' => [
        'mysql:dbname=testdb;host=localhost',
        'username',
        'password',
    ],
    'namespace' => 'App\\DataSource',
    'directory' => './src/App/DataSource',
    'transform' => new \Atlas\Cli\Transform([
        'table_name' => 'TypeName',
        // use a value of null to skip the table entirely
    ]);
];

Alternatively, provide a callable (or callable instance) of your own:

// /path/to/skeleton-config.php
return [
    'pdo' => [
        'mysql:dbname=testdb;host=localhost',
        'username',
        'password',
    ],
    'namespace' => 'App\\DataSource',
    'directory' => './src/App/DataSource',
    'transform' => function (string $table) : ?string {
        // return the $table name after transforming it into
        // a persistence model type name, or return null to
        // skip the table entirely
    },
];

1.2.1.4. Custom Templates

You can override the templates used by the skeleton generator and provide your own instead. This lets you customize the code generation; for example, to add your own common methods or to extend intercessory classes.

First, take a look at the default templates in the Atlas.Cli resources/templates/ directory:

  • Type.tpl
  • TypeEvents.tpl
  • TypeFields.tpl
  • TypeRecord.tpl
  • TypeRecordSet.tpl
  • TypeRelationships.tpl
  • TypeRow.tpl
  • TypeSelect.tpl
  • TypeTable.tpl
  • TypeTableEvents.tpl
  • TypeTableSelect.tpl

For each persistence model type name, the word "Type" in the filename will be replaced with the type; .tpl will be replaced with .php. For example, a threads table will become a Thread type, so the resulting files will be Thread.php, ThreadEvents.php, and so on.

To override a default template, create a custom template file of the same name in a directory of your own choosing. Then, in the skeleton config file, set a 'templates' key to that directory:

// /path/to/skeleton-config.php
return [
    'pdo' => [
        'mysql:dbname=testdb;host=localhost',
        'username',
        'password',
    ],
    'namespace' => 'App\\DataSource',
    'directory' => './src/App/DataSource',
    'templates' => '/path/to/custom-templates-dir'
];

When you run the skeleton command, it will look there first for each template, and then use the default template only if there is not a custom one available.

The skeleton file will replace these tokens in the template file with these values:

  • {NAMESPACE} => The namespace value from the config file.
  • {TYPE} => The persistence model type.
  • {DRIVER} => The database driver type.
  • {NAME} => The table name.
  • {COLUMN_NAMES} => An array of column names from the table.
  • {COLUMN_DEFAULTS} => An add of column default values from the table.
  • {AUTOINC_COLUMN} => The name of the autoincrement column, if any.
  • {PRIMARY_KEY} => An array of primary key column names.
  • {COLUMNS} => An array of the full column descriptions.
  • {AUTOINC_SEQUENCE} => The name of the auotincrement sequence, if any.
  • {PROPERTIES} => A partial docblock of properties for a Row.
  • {FIELDS} => A partial docblock of field names for a Record.