Schema::findConstraints() - Code Metrics - Inspection of "Fixed `yii\web\MultipartFormDataParser` adds an ex..." - rob006/yii2-dev - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 6d277d...c73de3 )

by Robert

created 2017-01-23 16:22 UTC

Schema::findConstraints() C

↳ Parent: Schema

Complexity

Conditions	9
Paths	33

Size

Total Lines	59
Code Lines	30

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	17
CRAP Score	19.125

Importance

Changes

Metric	Value
dl	0
loc	59
ccs	17
cts	34
cp	0.5
rs	6.9133
c	0
b	0
f	0
cc	9
eloc	30
nc	33
nop	1
crap	19.125

How to fix Long Method

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\db\mysql;

use yii\db\Expression;
use yii\db\TableSchema;
use yii\db\ColumnSchema;

/**
 * Schema is the class for retrieving metadata from a MySQL database (version 4.1.x and 5.x).
 *
 * @author Qiang Xue <[email protected]>
 * @since 2.0
 */
class Schema extends \yii\db\Schema
{
    /**
     * @var array mapping from physical column types (keys) to abstract column types (values)
     */
    public $typeMap = [
        'tinyint' => self::TYPE_SMALLINT,
        'bit' => self::TYPE_INTEGER,
        'smallint' => self::TYPE_SMALLINT,
        'mediumint' => self::TYPE_INTEGER,
        'int' => self::TYPE_INTEGER,
        'integer' => self::TYPE_INTEGER,
        'bigint' => self::TYPE_BIGINT,
        'float' => self::TYPE_FLOAT,
        'double' => self::TYPE_DOUBLE,
        'real' => self::TYPE_FLOAT,
        'decimal' => self::TYPE_DECIMAL,
        'numeric' => self::TYPE_DECIMAL,
        'tinytext' => self::TYPE_TEXT,
        'mediumtext' => self::TYPE_TEXT,
        'longtext' => self::TYPE_TEXT,
        'longblob' => self::TYPE_BINARY,
        'blob' => self::TYPE_BINARY,
        'text' => self::TYPE_TEXT,
        'varchar' => self::TYPE_STRING,
        'string' => self::TYPE_STRING,
        'char' => self::TYPE_CHAR,
        'datetime' => self::TYPE_DATETIME,
        'year' => self::TYPE_DATE,
        'date' => self::TYPE_DATE,
        'time' => self::TYPE_TIME,
        'timestamp' => self::TYPE_TIMESTAMP,
        'enum' => self::TYPE_STRING,
        'varbinary' => self::TYPE_BINARY,
    ];


    /**
     * Quotes a table name for use in a query.
     * A simple table name has no schema prefix.
     * @param string $name table name
     * @return string the properly quoted table name
     */
    public function quoteSimpleTableName($name)
    {
        return strpos($name, '`') !== false ? $name : "`$name`";
    }

    /**
     * Quotes a column name for use in a query.
     * A simple column name has no prefix.
     * @param string $name column name
     * @return string the properly quoted column name
     */
    public function quoteSimpleColumnName($name)
    {
        return strpos($name, '`') !== false || $name === '*' ? $name : "`$name`";
    }

    /**
     * Creates a query builder for the MySQL database.
     * @return QueryBuilder query builder instance
     */
    public function createQueryBuilder()
    {
        return new QueryBuilder($this->db);
    }

    /**
     * Loads the metadata for the specified table.
     * @param string $name table name
     * @return TableSchema driver dependent table metadata. Null if the table does not exist.
     */
    protected function loadTableSchema($name)
    {
        $table = new TableSchema;
        $this->resolveTableNames($table, $name);

        if ($this->findColumns($table)) {
            $this->findConstraints($table);

            return $table;
        } else {
            return null;
        }
    }

    /**
     * Resolves the table name and schema name (if any).
     * @param TableSchema $table the table metadata object
     * @param string $name the table name
     */
    protected function resolveTableNames($table, $name)
    {
        $parts = explode('.', str_replace('`', '', $name));
        if (isset($parts[1])) {
            $table->schemaName = $parts[0];
            $table->name = $parts[1];
            $table->fullName = $table->schemaName . '.' . $table->name;
        } else {
            $table->fullName = $table->name = $parts[0];
        }
    }

    /**
     * Loads the column information into a [[ColumnSchema]] object.
     * @param array $info column information
     * @return ColumnSchema the column schema object
     */
    protected function loadColumnSchema($info)
    {
        $column = $this->createColumnSchema();

        $column->name = $info['field'];
        $column->allowNull = $info['null'] === 'YES';
        $column->isPrimaryKey = strpos($info['key'], 'PRI') !== false;
        $column->autoIncrement = stripos($info['extra'], 'auto_increment') !== false;
        $column->comment = $info['comment'];

        $column->dbType = $info['type'];
        $column->unsigned = stripos($column->dbType, 'unsigned') !== false;

        $column->type = self::TYPE_STRING;
        if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $column->dbType, $matches)) {
            $type = strtolower($matches[1]);
            if (isset($this->typeMap[$type])) {
                $column->type = $this->typeMap[$type];
            }
            if (!empty($matches[2])) {
                if ($type === 'enum') {
                    preg_match_all("/'[^']*'/", $matches[2], $values);
                    foreach ($values[0] as $i => $value) {
                        $values[$i] = trim($value, "'");
                    }
                    $column->enumValues = $values;
function aContainsB(array $needle = null, array  $haystack) {
    if (!$needle) {
        return false;
    }

    return array_intersect($haystack, $needle) == $haystack;
}
                } else {
                    $values = explode(',', $matches[2]);
                    $column->size = $column->precision = (int) $values[0];
                    if (isset($values[1])) {
                        $column->scale = (int) $values[1];
                    }
                    if ($column->size === 1 && $type === 'bit') {
                        $column->type = 'boolean';
                    } elseif ($type === 'bit') {
                        if ($column->size > 32) {
                            $column->type = 'bigint';
                        } elseif ($column->size === 32) {
                            $column->type = 'integer';
                        }
                    }
                }
            }
        }

        $column->phpType = $this->getColumnPhpType($column);

        if (!$column->isPrimaryKey) {
            if ($column->type === 'timestamp' && $info['default'] === 'CURRENT_TIMESTAMP') {
                $column->defaultValue = new Expression('CURRENT_TIMESTAMP');
            } elseif (isset($type) && $type === 'bit') {
                $column->defaultValue = bindec(trim($info['default'], 'b\''));
            } else {
                $column->defaultValue = $column->phpTypecast($info['default']);
            }
        }

        return $column;
    }

    /**
     * Collects the metadata of table columns.
     * @param TableSchema $table the table metadata
     * @return bool whether the table exists in the database
     * @throws \Exception if DB query fails
     */
    protected function findColumns($table)
    {
        $sql = 'SHOW FULL COLUMNS FROM ' . $this->quoteTableName($table->fullName);
        try {
            $columns = $this->db->createCommand($sql)->queryAll();
        } catch (\Exception $e) {
            $previous = $e->getPrevious();
            if ($previous instanceof \PDOException && strpos($previous->getMessage(), 'SQLSTATE[42S02') !== false) {
                // table does not exist
                // https://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html#error_er_bad_table_error
                return false;
            }
            throw $e;
        }
        foreach ($columns as $info) {
            if ($this->db->slavePdo->getAttribute(\PDO::ATTR_CASE) !== \PDO::CASE_LOWER) {
                $info = array_change_key_case($info, CASE_LOWER);
            }
            $column = $this->loadColumnSchema($info);
            $table->columns[$column->name] = $column;
            if ($column->isPrimaryKey) {
                $table->primaryKey[] = $column->name;
                if ($column->autoIncrement) {
                    $table->sequenceName = '';
                }
            }
        }

        return true;
    }

    /**
     * Gets the CREATE TABLE sql string.
     * @param TableSchema $table the table metadata
     * @return string $sql the result of 'SHOW CREATE TABLE'
     */
    protected function getCreateTableSql($table)
    {
        $row = $this->db->createCommand('SHOW CREATE TABLE ' . $this->quoteTableName($table->fullName))->queryOne();
        if (isset($row['Create Table'])) {
            $sql = $row['Create Table'];
        } else {
            $row = array_values($row);
            $sql = $row[1];
        }

        return $sql;
    }

    /**
     * Collects the foreign key column details for the given table.
     * @param TableSchema $table the table metadata
     * @throws \Exception
     */
    protected function findConstraints($table)
    {
        $sql = <<<SQL
SELECT
    kcu.constraint_name,
    kcu.column_name,
    kcu.referenced_table_name,
    kcu.referenced_column_name
FROM information_schema.referential_constraints AS rc
JOIN information_schema.key_column_usage AS kcu ON
    (
        kcu.constraint_catalog = rc.constraint_catalog OR
        (kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
    ) AND
    kcu.constraint_schema = rc.constraint_schema AND
    kcu.constraint_name = rc.constraint_name
WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
AND rc.table_name = :tableName AND kcu.table_name = :tableName1
SQL;

        try {
            $rows = $this->db->createCommand($sql, [':tableName' => $table->name, ':tableName1' => $table->name])->queryAll();
            $constraints = [];

            foreach ($rows as $row) {
                $constraints[$row['constraint_name']]['referenced_table_name'] = $row['referenced_table_name'];
                $constraints[$row['constraint_name']]['columns'][$row['column_name']] = $row['referenced_column_name'];
            }

            $table->foreignKeys = [];
            foreach ($constraints as $name => $constraint) {
                $table->foreignKeys[$name] = array_merge(
                    [$constraint['referenced_table_name']],
                    $constraint['columns']
                );
            }
        } catch (\Exception $e) {
            $previous = $e->getPrevious();
            if (!$previous instanceof \PDOException || strpos($previous->getMessage(), 'SQLSTATE[42S02') === false) {
                throw $e;
            }

            // table does not exist, try to determine the foreign keys using the table creation sql
            $sql = $this->getCreateTableSql($table);
            $regexp = '/FOREIGN KEY\s+\(([^\)]+)\)\s+REFERENCES\s+([^\(^\s]+)\s*\(([^\)]+)\)/mi';
            if (preg_match_all($regexp, $sql, $matches, PREG_SET_ORDER)) {
                foreach ($matches as $match) {
                    $fks = array_map('trim', explode(',', str_replace('`', '', $match[1])));
                    $pks = array_map('trim', explode(',', str_replace('`', '', $match[3])));
                    $constraint = [str_replace('`', '', $match[2])];
                    foreach ($fks as $k => $name) {
                        $constraint[$name] = $pks[$k];
                    }
                    $table->foreignKeys[md5(serialize($constraint))] = $constraint;
                }
                $table->foreignKeys = array_values($table->foreignKeys);
            }
        }
    }

    /**
     * Returns all unique indexes for the given table.
     * Each array element is of the following structure:
     *
     * ```php
     * [
     *     'IndexName1' => ['col1' [, ...]],
     *     'IndexName2' => ['col2' [, ...]],
     * ]
     * ```
     *
     * @param TableSchema $table the table metadata
     * @return array all unique indexes for the given table.
     */
    public function findUniqueIndexes($table)
    {
        $sql = $this->getCreateTableSql($table);
        $uniqueIndexes = [];

        $regexp = '/UNIQUE KEY\s+([^\(\s]+)\s*\(([^\(\)]+)\)/mi';
        if (preg_match_all($regexp, $sql, $matches, PREG_SET_ORDER)) {
            foreach ($matches as $match) {
                $indexName = str_replace('`', '', $match[1]);
                $indexColumns = array_map('trim', explode(',', str_replace('`', '', $match[2])));
                $uniqueIndexes[$indexName] = $indexColumns;
            }
        }

        return $uniqueIndexes;
    }

    /**
     * Returns all table names in the database.
     * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
     * @return array all table names in the database. The names have NO schema name prefix.
     */
    protected function findTableNames($schema = '')
    {
        $sql = 'SHOW TABLES';
        if ($schema !== '') {
            $sql .= ' FROM ' . $this->quoteSimpleTableName($schema);
        }

        return $this->db->createCommand($sql)->queryColumn();
    }

    /**
     * @inheritdoc
     */
    public function createColumnSchemaBuilder($type, $length = null)
    {
        return new ColumnSchemaBuilder($type, $length, $this->db);
    }
}


1		<?php
2		/**
3		* @link http://www.yiiframework.com/
4		* @copyright Copyright (c) 2008 Yii Software LLC
5		* @license http://www.yiiframework.com/license/
6		*/
7
8		namespace yii\db\mysql;
9
10		use yii\db\Expression;
11		use yii\db\TableSchema;
12		use yii\db\ColumnSchema;
13
14		/**
15		* Schema is the class for retrieving metadata from a MySQL database (version 4.1.x and 5.x).
16		*
17		* @author Qiang Xue <[email protected]>
18		* @since 2.0
19		*/
20		class Schema extends \yii\db\Schema
21		{
22		/**
23		* @var array mapping from physical column types (keys) to abstract column types (values)
24		*/
25		public $typeMap = [
26		'tinyint' => self::TYPE_SMALLINT,
27		'bit' => self::TYPE_INTEGER,
28		'smallint' => self::TYPE_SMALLINT,
29		'mediumint' => self::TYPE_INTEGER,
30		'int' => self::TYPE_INTEGER,
31		'integer' => self::TYPE_INTEGER,
32		'bigint' => self::TYPE_BIGINT,
33		'float' => self::TYPE_FLOAT,
34		'double' => self::TYPE_DOUBLE,
35		'real' => self::TYPE_FLOAT,
36		'decimal' => self::TYPE_DECIMAL,
37		'numeric' => self::TYPE_DECIMAL,
38		'tinytext' => self::TYPE_TEXT,
39		'mediumtext' => self::TYPE_TEXT,
40		'longtext' => self::TYPE_TEXT,
41		'longblob' => self::TYPE_BINARY,
42		'blob' => self::TYPE_BINARY,
43		'text' => self::TYPE_TEXT,
44		'varchar' => self::TYPE_STRING,
45		'string' => self::TYPE_STRING,
46		'char' => self::TYPE_CHAR,
47		'datetime' => self::TYPE_DATETIME,
48		'year' => self::TYPE_DATE,
49		'date' => self::TYPE_DATE,
50		'time' => self::TYPE_TIME,
51		'timestamp' => self::TYPE_TIMESTAMP,
52		'enum' => self::TYPE_STRING,
53		'varbinary' => self::TYPE_BINARY,
54		];
55
56
57		/**
58		* Quotes a table name for use in a query.
59		* A simple table name has no schema prefix.
60		* @param string $name table name
61		* @return string the properly quoted table name
62		*/
63	303	public function quoteSimpleTableName($name)
64		{
65	303	return strpos($name, '`') !== false ? $name : "`$name`";
66		}
67
68		/**
69		* Quotes a column name for use in a query.
70		* A simple column name has no prefix.
71		* @param string $name column name
72		* @return string the properly quoted column name
73		*/
74	310	public function quoteSimpleColumnName($name)
75		{
76	310	return strpos($name, '`') !== false \|\| $name === '*' ? $name : "`$name`";
77		}
78
79		/**
80		* Creates a query builder for the MySQL database.
81		* @return QueryBuilder query builder instance
82		*/
83	149	public function createQueryBuilder()
84		{
85	149	return new QueryBuilder($this->db);
86		}
87
88		/**
89		* Loads the metadata for the specified table.
90		* @param string $name table name
91		* @return TableSchema driver dependent table metadata. Null if the table does not exist.
92		*/
93	150	protected function loadTableSchema($name)
94		{
95	150	$table = new TableSchema;
96	150	$this->resolveTableNames($table, $name);
97
98	150	if ($this->findColumns($table)) {
99	147	$this->findConstraints($table);
100
101	147	return $table;
102		} else {
103	7	return null;
104		}
105		}
106
107		/**
108		* Resolves the table name and schema name (if any).
109		* @param TableSchema $table the table metadata object
110		* @param string $name the table name
111		*/
112	150	protected function resolveTableNames($table, $name)
113		{
114	150	$parts = explode('.', str_replace('`', '', $name));
115	150	if (isset($parts[1])) {
116		$table->schemaName = $parts[0];
117		$table->name = $parts[1];
118		$table->fullName = $table->schemaName . '.' . $table->name;
119		} else {
120	150	$table->fullName = $table->name = $parts[0];
121		}
122	150	}
123
124		/**
125		* Loads the column information into a [[ColumnSchema]] object.
126		* @param array $info column information
127		* @return ColumnSchema the column schema object
128		*/
129	147	protected function loadColumnSchema($info)
130		{
131	147	$column = $this->createColumnSchema();
132
133	147	$column->name = $info['field'];
134	147	$column->allowNull = $info['null'] === 'YES';
135	147	$column->isPrimaryKey = strpos($info['key'], 'PRI') !== false;
136	147	$column->autoIncrement = stripos($info['extra'], 'auto_increment') !== false;
137	147	$column->comment = $info['comment'];
138
139	147	$column->dbType = $info['type'];
140	147	$column->unsigned = stripos($column->dbType, 'unsigned') !== false;
141
142	147	$column->type = self::TYPE_STRING;
143	147	if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $column->dbType, $matches)) {
144	147	$type = strtolower($matches[1]);
145	147	if (isset($this->typeMap[$type])) {
146	147	$column->type = $this->typeMap[$type];
147	147	}
148	147	if (!empty($matches[2])) {
149	147	if ($type === 'enum') {
150	14	preg_match_all("/'[^']*'/", $matches[2], $values);
151	14	foreach ($values[0] as $i => $value) {
152	14	$values[$i] = trim($value, "'");
153	14	}
154	14	$column->enumValues = $values;
		0 ignored issues – show Documentation Bug introduced 2016-12-01 11:12 UTC by Report Bug Copy Issue Report It seems like `$values` can be `null`. However, the property `$enumValues` is declared as `array`. Maybe change the type of the property to `array\|null` or add a type check? Our type inference engine has found an assignment of a scalar value (like a string, an integer or null) to a property which is an array. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property. To type hint that a parameter can be either an array or null, you can set a type hint of array and a default value of null. The PHP interpreter will then accept both an array or null for that parameter. function aContainsB(array $needle = null, array $haystack) { if (!$needle) { return false; } return array_intersect($haystack, $needle) == $haystack; } The function can be called with either null or an array for the parameter `$needle` but will only accept an array as `$haystack`. Loading history...
155	14	} else {
156	147	$values = explode(',', $matches[2]);
157	147	$column->size = $column->precision = (int) $values[0];
158	147	if (isset($values[1])) {
159	64	$column->scale = (int) $values[1];
160	64	}
161	147	if ($column->size === 1 && $type === 'bit') {
162	5	$column->type = 'boolean';
163	147	} elseif ($type === 'bit') {
164	14	if ($column->size > 32) {
165		$column->type = 'bigint';
166	14	} elseif ($column->size === 32) {
167		$column->type = 'integer';
168		}
169	14	}
170		}
171	147	}
172	147	}
173
174	147	$column->phpType = $this->getColumnPhpType($column);
175
176	147	if (!$column->isPrimaryKey) {
177	143	if ($column->type === 'timestamp' && $info['default'] === 'CURRENT_TIMESTAMP') {
178	14	$column->defaultValue = new Expression('CURRENT_TIMESTAMP');
179	143	} elseif (isset($type) && $type === 'bit') {
180	15	$column->defaultValue = bindec(trim($info['default'], 'b\''));
181	15	} else {
182	142	$column->defaultValue = $column->phpTypecast($info['default']);
183		}
184	143	}
185
186	147	return $column;
187		}
188
189		/**
190		* Collects the metadata of table columns.
191		* @param TableSchema $table the table metadata
192		* @return bool whether the table exists in the database
193		* @throws \Exception if DB query fails
194		*/
195	150	protected function findColumns($table)
196		{
197	150	$sql = 'SHOW FULL COLUMNS FROM ' . $this->quoteTableName($table->fullName);
198		try {
199	150	$columns = $this->db->createCommand($sql)->queryAll();
200	150	} catch (\Exception $e) {
201	7	$previous = $e->getPrevious();
202	7	if ($previous instanceof \PDOException && strpos($previous->getMessage(), 'SQLSTATE[42S02') !== false) {
203		// table does not exist
204		// https://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html#error_er_bad_table_error
205	7	return false;
206		}
207		throw $e;
208		}
209	147	foreach ($columns as $info) {
210	147	if ($this->db->slavePdo->getAttribute(\PDO::ATTR_CASE) !== \PDO::CASE_LOWER) {
211	146	$info = array_change_key_case($info, CASE_LOWER);
212	146	}
213	147	$column = $this->loadColumnSchema($info);
214	147	$table->columns[$column->name] = $column;
215	147	if ($column->isPrimaryKey) {
216	135	$table->primaryKey[] = $column->name;
217	135	if ($column->autoIncrement) {
218	105	$table->sequenceName = '';
219	105	}
220	135	}
221	147	}
222
223	147	return true;
224		}
225
226		/**
227		* Gets the CREATE TABLE sql string.
228		* @param TableSchema $table the table metadata
229		* @return string $sql the result of 'SHOW CREATE TABLE'
230		*/
231	1	protected function getCreateTableSql($table)
232		{
233	1	$row = $this->db->createCommand('SHOW CREATE TABLE ' . $this->quoteTableName($table->fullName))->queryOne();
234	1	if (isset($row['Create Table'])) {
235	1	$sql = $row['Create Table'];
236	1	} else {
237		$row = array_values($row);
238		$sql = $row[1];
239		}
240
241	1	return $sql;
242		}
243
244		/**
245		* Collects the foreign key column details for the given table.
246		* @param TableSchema $table the table metadata
247		* @throws \Exception
248		*/
249	147	protected function findConstraints($table)
250		{
251		$sql = <<<SQL
252		SELECT
253		kcu.constraint_name,
254		kcu.column_name,
255		kcu.referenced_table_name,
256		kcu.referenced_column_name
257		FROM information_schema.referential_constraints AS rc
258		JOIN information_schema.key_column_usage AS kcu ON
259		(
260		kcu.constraint_catalog = rc.constraint_catalog OR
261		(kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
262		) AND
263		kcu.constraint_schema = rc.constraint_schema AND
264		kcu.constraint_name = rc.constraint_name
265		WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
266		AND rc.table_name = :tableName AND kcu.table_name = :tableName1
267	147	SQL;
268
269		try {
270	147	$rows = $this->db->createCommand($sql, [':tableName' => $table->name, ':tableName1' => $table->name])->queryAll();
271	147	$constraints = [];
272
273	147	foreach ($rows as $row) {
274	67	$constraints[$row['constraint_name']]['referenced_table_name'] = $row['referenced_table_name'];
275	67	$constraints[$row['constraint_name']]['columns'][$row['column_name']] = $row['referenced_column_name'];
276	147	}
277
278	147	$table->foreignKeys = [];
279	147	foreach ($constraints as $name => $constraint) {
280	67	$table->foreignKeys[$name] = array_merge(
281	67	[$constraint['referenced_table_name']],
282	67	$constraint['columns']
283	67	);
284	147	}
285	147	} catch (\Exception $e) {
286		$previous = $e->getPrevious();
287		if (!$previous instanceof \PDOException \|\| strpos($previous->getMessage(), 'SQLSTATE[42S02') === false) {
288		throw $e;
289		}
290
291		// table does not exist, try to determine the foreign keys using the table creation sql
292		$sql = $this->getCreateTableSql($table);
293		$regexp = '/FOREIGN KEY\s+\(([^\)]+)\)\s+REFERENCES\s+([^\(^\s]+)\s*\(([^\)]+)\)/mi';
294		if (preg_match_all($regexp, $sql, $matches, PREG_SET_ORDER)) {
295		foreach ($matches as $match) {
296		$fks = array_map('trim', explode(',', str_replace('`', '', $match[1])));
297		$pks = array_map('trim', explode(',', str_replace('`', '', $match[3])));
298		$constraint = [str_replace('`', '', $match[2])];
299		foreach ($fks as $k => $name) {
300		$constraint[$name] = $pks[$k];
301		}
302		$table->foreignKeys[md5(serialize($constraint))] = $constraint;
303		}
304		$table->foreignKeys = array_values($table->foreignKeys);
305		}
306		}
307	147	}
308
309		/**
310		* Returns all unique indexes for the given table.
311		* Each array element is of the following structure:
312		*
313		* ```php
314		* [
315		* 'IndexName1' => ['col1' [, ...]],
316		* 'IndexName2' => ['col2' [, ...]],
317		* ]
318		* ```
319		*
320		* @param TableSchema $table the table metadata
321		* @return array all unique indexes for the given table.
322		*/
323	1	public function findUniqueIndexes($table)
324		{
325	1	$sql = $this->getCreateTableSql($table);
326	1	$uniqueIndexes = [];
327
328	1	$regexp = '/UNIQUE KEY\s+([^\(\s]+)\s*\(([^\(\)]+)\)/mi';
329	1	if (preg_match_all($regexp, $sql, $matches, PREG_SET_ORDER)) {
330	1	foreach ($matches as $match) {
331	1	$indexName = str_replace('`', '', $match[1]);
332	1	$indexColumns = array_map('trim', explode(',', str_replace('`', '', $match[2])));
333	1	$uniqueIndexes[$indexName] = $indexColumns;
334	1	}
335	1	}
336
337	1	return $uniqueIndexes;
338		}
339
340		/**
341		* Returns all table names in the database.
342		* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
343		* @return array all table names in the database. The names have NO schema name prefix.
344		*/
345	6	protected function findTableNames($schema = '')
346		{
347	6	$sql = 'SHOW TABLES';
348	6	if ($schema !== '') {
349		$sql .= ' FROM ' . $this->quoteSimpleTableName($schema);
350		}
351
352	6	return $this->db->createCommand($sql)->queryColumn();
353		}
354
355		/**
356		* @inheritdoc
357		*/
358	2	public function createColumnSchemaBuilder($type, $length = null)
359		{
360	2	return new ColumnSchemaBuilder($type, $length, $this->db);
361		}
362		}
363

rob006 / yii2-dev

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Schema::findConstraints() C

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