Crudités ?

"Crudités, it's a cup of carrots sticks"

Create - Retrieve - Update - Delete - Introspection, Transaction, Errors & Schema

CRUDITES
C  CRUD
R  Relations
U  Uniques as PK
D  Disable, Don't Delete
I  Introspect & Inspect
T  Transactions and Tracking
E  Errors
S  Security

Crudites is a PHP PDO wrapper

Exception

CruditeException extends \Exception and is thrown by all Crudites components

Source

The Source object stores and validates a DSN (Data Source Name)

Instantiation

It is created using a DSN string, the constructor will extract and validates all the required information

mysql:host=localhost;dbname=testdb
mysql:host=localhost;port=3307;dbname=testdb

Exceptions

If the database's name or a proper driver cannot be found, a CruditesException is thrown with the message

• _DSN_NO_DBNAME_
• _DSN_NO_DRIVER_
• _DSN_UNAVAILABLE_DRIVER_

Properties

The object stores

1. The DSN string (constructor parameter)
2. The database name (extracted from the DSN string)

The object validates the driver's name (extracted from DSN string) by calling \PDO::getAvailableDrivers()

Methods

When instantiated, the object provides two methods:

1. DSN(), returns the DSN string (string)
2. name(), returns the database name (string)

Connection

The Connection object relies on PDO to connect to a database.

Instantiation

It is created using

1. a DSN string
2. a username (optional)
3. a password (optional)
4. a list of driver options (optional)

Exceptions

The DSN string is validated using the Source object, and may throw CruditesException A PDO object is created and may throw a PDOException

Default Options

\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION, // the one option you cannot change
\PDO::ATTR_CASE => \PDO::CASE_NATURAL,
\PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC

The PDO::ATTR_ERRMODE is the only option that cannot be overridden

Properties

The object stores:

1. a Source object;
2. a database name (string)
3. a PDO object

Methods

When instantiated, the object provides the following methods:

Database related

• useDatabase(string name)
• driverName()
• databaseName()

Query execution

• prepare(string statement)
• query()
• alter()
• lastInsertId(string name)
• errorInfo()
• errorCode()

Transactions

• transact()
• commit()
• rollback()

Database

The object represent a SQL database, handles connection and introspection.

Introspection is a two step process:

1. The INFORMATION_SCHEMA is queried and FK and UNIQUE constraints are stored in the object properties upon instantiation
2. The table introspection, called inspection, is executed on demand using inspect(table_name) and the results are stored in the table cache property. Inspection uses introspection to create a complete representation of a table: fields, data type, defaults & constraints

Instantiation

It is created using a Connection object. The connection is stored and the database instrospection is executed.

Properties

• Connection object
• Table cache (array)
• List of foreign keys, indexed by table (array)
• List of unique constraints, indexed by table (array)

Methods

When instantiated, the object provides the following methods:

• name(), returns the database name
• connection(), returns the Connection object
• inspect(string table_name), return a Table object