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<?php /** * @link https://www.yiiframework.com/ * @copyright Copyright (c) 2008 Yii Software LLC * @license https://www.yiiframework.com/license/ */ namespace yii\db; /** * ConstraintFinderTrait provides methods for getting a table constraint information. * * @property CheckConstraint[][] $schemaChecks Check constraints for all tables in the database. * Each array element is an array of [[CheckConstraint]] or its child classes. This property is read-only. * @property DefaultValueConstraint[] $schemaDefaultValues Default value constraints for all tables in the database. * Each array element is an array of [[DefaultValueConstraint]] or its child classes. This property is read-only. * @property ForeignKeyConstraint[][] $schemaForeignKeys Foreign keys for all tables in the database. Each * array element is an array of [[ForeignKeyConstraint]] or its child classes. This property is read-only. * @property IndexConstraint[][] $schemaIndexes Indexes for all tables in the database. Each array element is * an array of [[IndexConstraint]] or its child classes. This property is read-only. * @property Constraint[] $schemaPrimaryKeys Primary keys for all tables in the database. Each array element * is an instance of [[Constraint]] or its child class. This property is read-only. * @property IndexConstraint[][] $schemaUniques Unique constraints for all tables in the database. * Each array element is an array of [[IndexConstraint]] or its child classes. This property is read-only. * * @author Sergey Makinen <sergey@makinen.ru> * @since 2.0.13 */ trait ConstraintFinderTrait { /** * Returns the metadata of the given type for the given table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param string $type metadata type. * @param bool $refresh whether to reload the table metadata even if it is found in the cache. * @return mixed metadata. */ abstract protected function getTableMetadata($name, $type, $refresh); /** * Returns the metadata of the given type for all tables in the given schema. * @param string $schema the schema of the metadata. Defaults to empty string, meaning the current or default schema name. * @param string $type metadata type. * @param bool $refresh whether to fetch the latest available table metadata. If this is `false`, * cached data may be returned if available. * @return array array of metadata. */ abstract protected function getSchemaMetadata($schema, $type, $refresh); /** * Loads a primary key for the given table. * @param string $tableName table name. * @return Constraint|null primary key for the given table, `null` if the table has no primary key. */ abstract protected function loadTablePrimaryKey($tableName); /** * Loads all foreign keys for the given table. * @param string $tableName table name. * @return ForeignKeyConstraint[] foreign keys for the given table. */ abstract protected function loadTableForeignKeys($tableName); /** * Loads all indexes for the given table. * @param string $tableName table name. * @return IndexConstraint[] indexes for the given table. */ abstract protected function loadTableIndexes($tableName); /** * Loads all unique constraints for the given table. * @param string $tableName table name. * @return Constraint[] unique constraints for the given table. */ abstract protected function loadTableUniques($tableName); /** * Loads all check constraints for the given table. * @param string $tableName table name. * @return CheckConstraint[] check constraints for the given table. */ abstract protected function loadTableChecks($tableName); /** * Loads all default value constraints for the given table. * * @param string $tableName table name. * @return DefaultValueConstraint[] default value constraints for the given table. */ abstract protected function loadTableDefaultValues($tableName); /** * Obtains the primary key for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return Constraint|null table primary key, `null` if the table has no primary key. */ public function getTablePrimaryKey($name, $refresh = false) { return $this->getTableMetadata($name, 'primaryKey', $refresh); } /** * Returns primary keys for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is `false`, * cached data may be returned if available. * @return Constraint[] primary keys for all tables in the database. * Each array element is an instance of [[Constraint]] or its child class. */ public function getSchemaPrimaryKeys($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'primaryKey', $refresh); } /** * Obtains the foreign keys information for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return ForeignKeyConstraint[] table foreign keys. */ public function getTableForeignKeys($name, $refresh = false) { return $this->getTableMetadata($name, 'foreignKeys', $refresh); } /** * Returns foreign keys for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is false, * cached data may be returned if available. * @return ForeignKeyConstraint[][] foreign keys for all tables in the database. * Each array element is an array of [[ForeignKeyConstraint]] or its child classes. */ public function getSchemaForeignKeys($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'foreignKeys', $refresh); } /** * Obtains the indexes information for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return IndexConstraint[] table indexes. */ public function getTableIndexes($name, $refresh = false) { return $this->getTableMetadata($name, 'indexes', $refresh); } /** * Returns indexes for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is false, * cached data may be returned if available. * @return IndexConstraint[][] indexes for all tables in the database. * Each array element is an array of [[IndexConstraint]] or its child classes. */ public function getSchemaIndexes($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'indexes', $refresh); } /** * Obtains the unique constraints information for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return Constraint[] table unique constraints. */ public function getTableUniques($name, $refresh = false) { return $this->getTableMetadata($name, 'uniques', $refresh); } /** * Returns unique constraints for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is false, * cached data may be returned if available. * @return Constraint[][] unique constraints for all tables in the database. * Each array element is an array of [[Constraint]] or its child classes. */ public function getSchemaUniques($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'uniques', $refresh); } /** * Obtains the check constraints information for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return CheckConstraint[] table check constraints. */ public function getTableChecks($name, $refresh = false) { return $this->getTableMetadata($name, 'checks', $refresh); } /** * Returns check constraints for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is false, * cached data may be returned if available. * @return CheckConstraint[][] check constraints for all tables in the database. * Each array element is an array of [[CheckConstraint]] or its child classes. */ public function getSchemaChecks($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'checks', $refresh); } /** * Obtains the default value constraints information for the named table. * @param string $name table name. The table name may contain schema name if any. Do not quote the table name. * @param bool $refresh whether to reload the information even if it is found in the cache. * @return DefaultValueConstraint[] table default value constraints. */ public function getTableDefaultValues($name, $refresh = false) { return $this->getTableMetadata($name, 'defaultValues', $refresh); } /** * Returns default value constraints for all tables in the database. * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name. * @param bool $refresh whether to fetch the latest available table schemas. If this is false, * cached data may be returned if available. * @return DefaultValueConstraint[] default value constraints for all tables in the database. * Each array element is an array of [[DefaultValueConstraint]] or its child classes. */ public function getSchemaDefaultValues($schema = '', $refresh = false) { return $this->getSchemaMetadata($schema, 'defaultValues', $refresh); } }