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106 lines
3.1 KiB
PHP
106 lines
3.1 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db;
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use yii\base\Object;
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use yii\base\InvalidParamException;
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/**
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* TableSchema represents the metadata of a database table.
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*
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* @property array $columnNames List of column names. This property is read-only.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class TableSchema extends Object
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{
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/**
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* @var string the name of the schema that this table belongs to.
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*/
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public $schemaName;
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/**
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* @var string the name of this table. The schema name is not included. Use [[fullName]] to get the name with schema name prefix.
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*/
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public $name;
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/**
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* @var string the full name of this table, which includes the schema name prefix, if any.
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* Note that if the schema name is the same as the [[Schema::defaultSchema|default schema name]],
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* the schema name will not be included.
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*/
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public $fullName;
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/**
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* @var string[] primary keys of this table.
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*/
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public $primaryKey = [];
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/**
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* @var string sequence name for the primary key. Null if no sequence.
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*/
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public $sequenceName;
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/**
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* @var array foreign keys of this table. Each array element is of the following structure:
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*
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* ~~~
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* [
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* 'ForeignTableName',
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* 'fk1' => 'pk1', // pk1 is in foreign table
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* 'fk2' => 'pk2', // if composite foreign key
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* ]
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* ~~~
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*/
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public $foreignKeys = [];
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/**
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* @var ColumnSchema[] column metadata of this table. Each array element is a [[ColumnSchema]] object, indexed by column names.
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*/
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public $columns = [];
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/**
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* Gets the named column metadata.
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* This is a convenient method for retrieving a named column even if it does not exist.
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* @param string $name column name
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* @return ColumnSchema metadata of the named column. Null if the named column does not exist.
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*/
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public function getColumn($name)
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{
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return isset($this->columns[$name]) ? $this->columns[$name] : null;
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}
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/**
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* Returns the names of all columns in this table.
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* @return array list of column names
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*/
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public function getColumnNames()
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{
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return array_keys($this->columns);
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}
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/**
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* Manually specifies the primary key for this table.
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* @param string|array $keys the primary key (can be composite)
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* @throws InvalidParamException if the specified key cannot be found in the table.
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*/
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public function fixPrimaryKey($keys)
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{
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if (!is_array($keys)) {
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$keys = [$keys];
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}
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$this->primaryKey = $keys;
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foreach ($this->columns as $column) {
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$column->isPrimaryKey = false;
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}
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foreach ($keys as $key) {
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if (isset($this->columns[$key])) {
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$this->columns[$key]->isPrimaryKey = true;
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} else {
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throw new InvalidParamException("Primary key '$key' cannot be found in table '{$this->name}'.");
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}
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}
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}
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}
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