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237 lines
11 KiB
PHP
237 lines
11 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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/**
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* ConstraintFinderTrait provides methods for getting a table constraint information.
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*
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* @property CheckConstraint[][] $schemaChecks Check constraints for all tables in the database.
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* Each array element is an array of [[CheckConstraint]] or its child classes. This property is read-only.
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* @property DefaultValueConstraint[] $schemaDefaultValues Default value constraints for all tables in the database.
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* Each array element is an array of [[DefaultValueConstraint]] or its child classes. This property is read-only.
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* @property ForeignKeyConstraint[][] $schemaForeignKeys Foreign keys for all tables in the database. Each
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* array element is an array of [[ForeignKeyConstraint]] or its child classes. This property is read-only.
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* @property IndexConstraint[][] $schemaIndexes Indexes for all tables in the database. Each array element is
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* an array of [[IndexConstraint]] or its child classes. This property is read-only.
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* @property Constraint[] $schemaPrimaryKeys Primary keys for all tables in the database. Each array element
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* is an instance of [[Constraint]] or its child class. This property is read-only.
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* @property IndexConstraint[][] $schemaUniques Unique constraints for all tables in the database.
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* Each array element is an array of [[IndexConstraint]] or its child classes. This property is read-only.
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*
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* @author Sergey Makinen <sergey@makinen.ru>
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* @since 2.0.13
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*/
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trait ConstraintFinderTrait
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{
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/**
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* Returns the metadata of the given type for the given table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param string $type metadata type.
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* @param bool $refresh whether to reload the table metadata even if it is found in the cache.
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* @return mixed metadata.
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*/
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abstract protected function getTableMetadata($name, $type, $refresh);
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/**
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* Returns the metadata of the given type for all tables in the given schema.
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* @param string $schema the schema of the metadata. Defaults to empty string, meaning the current or default schema name.
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* @param string $type metadata type.
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* @param bool $refresh whether to fetch the latest available table metadata. If this is `false`,
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* cached data may be returned if available.
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* @return array array of metadata.
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*/
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abstract protected function getSchemaMetadata($schema, $type, $refresh);
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/**
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* Loads a primary key for the given table.
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* @param string $tableName table name.
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* @return Constraint|null primary key for the given table, `null` if the table has no primary key.
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*/
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abstract protected function loadTablePrimaryKey($tableName);
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/**
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* Loads all foreign keys for the given table.
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* @param string $tableName table name.
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* @return ForeignKeyConstraint[] foreign keys for the given table.
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*/
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abstract protected function loadTableForeignKeys($tableName);
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/**
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* Loads all indexes for the given table.
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* @param string $tableName table name.
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* @return IndexConstraint[] indexes for the given table.
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*/
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abstract protected function loadTableIndexes($tableName);
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/**
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* Loads all unique constraints for the given table.
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* @param string $tableName table name.
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* @return Constraint[] unique constraints for the given table.
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*/
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abstract protected function loadTableUniques($tableName);
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/**
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* Loads all check constraints for the given table.
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* @param string $tableName table name.
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* @return CheckConstraint[] check constraints for the given table.
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*/
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abstract protected function loadTableChecks($tableName);
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/**
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* Loads all default value constraints for the given table.
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*
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* @param string $tableName table name.
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* @return DefaultValueConstraint[] default value constraints for the given table.
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*/
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abstract protected function loadTableDefaultValues($tableName);
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/**
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* Obtains the primary key for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return Constraint|null table primary key, `null` if the table has no primary key.
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*/
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public function getTablePrimaryKey($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'primaryKey', $refresh);
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}
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/**
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* Returns primary keys for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is `false`,
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* cached data may be returned if available.
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* @return Constraint[] primary keys for all tables in the database.
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* Each array element is an instance of [[Constraint]] or its child class.
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*/
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public function getSchemaPrimaryKeys($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'primaryKey', $refresh);
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}
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/**
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* Obtains the foreign keys information for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return ForeignKeyConstraint[] table foreign keys.
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*/
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public function getTableForeignKeys($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'foreignKeys', $refresh);
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}
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/**
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* Returns foreign keys for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is false,
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* cached data may be returned if available.
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* @return ForeignKeyConstraint[][] foreign keys for all tables in the database.
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* Each array element is an array of [[ForeignKeyConstraint]] or its child classes.
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*/
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public function getSchemaForeignKeys($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'foreignKeys', $refresh);
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}
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/**
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* Obtains the indexes information for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return IndexConstraint[] table indexes.
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*/
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public function getTableIndexes($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'indexes', $refresh);
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}
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/**
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* Returns indexes for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is false,
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* cached data may be returned if available.
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* @return IndexConstraint[][] indexes for all tables in the database.
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* Each array element is an array of [[IndexConstraint]] or its child classes.
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*/
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public function getSchemaIndexes($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'indexes', $refresh);
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}
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/**
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* Obtains the unique constraints information for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return Constraint[] table unique constraints.
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*/
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public function getTableUniques($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'uniques', $refresh);
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}
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/**
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* Returns unique constraints for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is false,
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* cached data may be returned if available.
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* @return Constraint[][] unique constraints for all tables in the database.
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* Each array element is an array of [[Constraint]] or its child classes.
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*/
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public function getSchemaUniques($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'uniques', $refresh);
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}
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/**
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* Obtains the check constraints information for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return CheckConstraint[] table check constraints.
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*/
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public function getTableChecks($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'checks', $refresh);
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}
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/**
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* Returns check constraints for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is false,
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* cached data may be returned if available.
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* @return CheckConstraint[][] check constraints for all tables in the database.
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* Each array element is an array of [[CheckConstraint]] or its child classes.
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*/
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public function getSchemaChecks($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'checks', $refresh);
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}
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/**
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* Obtains the default value constraints information for the named table.
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* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
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* @param bool $refresh whether to reload the information even if it is found in the cache.
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* @return DefaultValueConstraint[] table default value constraints.
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*/
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public function getTableDefaultValues($name, $refresh = false)
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{
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return $this->getTableMetadata($name, 'defaultValues', $refresh);
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}
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/**
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* Returns default value constraints for all tables in the database.
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* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema name.
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* @param bool $refresh whether to fetch the latest available table schemas. If this is false,
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* cached data may be returned if available.
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* @return DefaultValueConstraint[] default value constraints for all tables in the database.
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* Each array element is an array of [[DefaultValueConstraint]] or its child classes.
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*/
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public function getSchemaDefaultValues($schema = '', $refresh = false)
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{
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return $this->getSchemaMetadata($schema, 'defaultValues', $refresh);
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}
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}
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