MigrationHelper
- Type
- Class
- Namespace
- craft\helpers
- Inherits
- craft\helpers\MigrationHelper
- Since
- 3.0.0
Migration utility methods.
# Public Methods
| Method | Description |
|---|---|
| doesForeignKeyExist() | Returns whether a foreign key exists. |
| doesIndexExist() | Returns whether an index exists. |
| dropAllForeignKeysOnTable() | Drops all the foreign keys on a table. |
| dropAllForeignKeysToTable() | Drops all the foreign keys that reference a table. |
| dropAllIndexesOnTable() | Drops all the indexes on a table. |
| dropAllUniqueIndexesOnTable() | Drops all the unique indexes on a table. |
| dropForeignKey() | Drops a foreign key. |
| dropForeignKeyIfExists() | Drops a foreign key if it exists. |
| dropIndex() | Drops an index. |
| dropIndexIfExists() | Drops an index if it exists. |
| dropTable() | Drops a table, its own foreign keys, and any foreign keys referencing it. |
| findForeignKey() | Returns whether a foreign key exists. |
| findForeignKeysTo() | Returns a list of all the foreign keys that point to a given table/column. |
| renameColumn() | Renames a column, while also updating any index and FK names that use the column. |
| renameTable() | Renames a table, while also updating its sequence, index, and FK names, as well as any other FK names pointing to the table. |
| restoreForeignKey() | Restores a foreign key. |
| restoreIndex() | Restores an index. |
# doesForeignKeyExist()
Returns whether a foreign key exists.
Arguments
Returns
# doesIndexExist()
Returns whether an index exists.
Arguments
Returns
# dropAllForeignKeysOnTable()
Drops all the foreign keys on a table.
Arguments
$tableName(string)$migration(craft\db\Migration, null)
Returns
array – An array of the foreign keys that were just dropped.
# dropAllForeignKeysToTable()
Drops all the foreign keys that reference a table.
Arguments
$tableName(string)$migration(craft\db\Migration, null)
# dropAllIndexesOnTable()
Drops all the indexes on a table.
Arguments
$tableName(string)$migration(craft\db\Migration, null)
Returns
array – An array of the indexes that were just dropped.
# dropAllUniqueIndexesOnTable()
DEPRECATED
Deprecated in 3.1.0
Drops all the unique indexes on a table.
Arguments
$tableName(string)$migration(craft\db\Migration, null)
# dropForeignKey()
Drops a foreign key.
Arguments
$tableName(string)$columns(string, string[])$migration(craft\db\Migration, null)
# dropForeignKeyIfExists()
Drops a foreign key if it exists.
Arguments
$tableName(string)$columns(string, string[])$migration(craft\db\Migration, null)
# dropIndex()
DEPRECATED
Deprecated in 3.1.0. Use dropIndexIfExists() instead.
Drops an index.
Arguments
$tableName(string)$columns(string, string[])$unique(boolean)$migration(craft\db\Migration, null)
# dropIndexIfExists()
Drops an index if it exists.
Arguments
$tableName(string)$columns(string, string[])$unique(boolean)$migration(craft\db\Migration, null)
# dropTable()
Drops a table, its own foreign keys, and any foreign keys referencing it.
Arguments
$tableName(string)$migration(craft\db\Migration, null)
# findForeignKey()
- Since
- 3.0.27
Returns whether a foreign key exists.
Arguments
Returns
string, null – The foreign key name, or null if it doesn't exist
# findForeignKeysTo()
Returns a list of all the foreign keys that point to a given table/column.
Arguments
$tableName(string) – The table the foreign keys should point to.$column(string) – The column the foreign keys should point to. Defaults to 'id'.
Returns
array – A list of the foreign keys pointing to that table/column.
# renameColumn()
Renames a column, while also updating any index and FK names that use the column.
Arguments
$tableName(string)$oldName(string)$newName(string)$migration(craft\db\Migration, null)
# renameTable()
Renames a table, while also updating its sequence, index, and FK names, as well as any other FK names pointing to the table.
Arguments
$oldName(string)$newName(string)$migration(craft\db\Migration, null)
# restoreForeignKey()
DEPRECATED
Deprecated in 3.1.0
Restores a foreign key.
Arguments
$tableName(string)$columns(string, string[])$refTable(string)$refColumns(array)$onUpdate(string)$onDelete(string)$migration(craft\db\Migration, null)
# restoreIndex()
DEPRECATED
Deprecated in 3.1.0
Restores an index.
Arguments
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