public Schema::dropField($table, $field)
Drop a field.
Parameters
$table: The table to be altered.
$field: The field to be dropped.
Return value
TRUE if the field was successfully dropped, FALSE if there was no field by that name to begin with.
Overrides Schema::dropField
File
- core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php, line 503
Class
- Schema
- SQLite implementation of \Drupal\Core\Database\Schema.
Namespace
Drupal\Core\Database\Driver\sqlite
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | public function dropField($table, $field) { if (!$this->fieldExists($table, $field)) { return FALSE; } $old_schema = $this->introspectSchema($table); $new_schema = $old_schema; unset($new_schema['fields'][$field]); // Handle possible primary key changes. if (isset($new_schema['primary key']) && ($key = array_search($field, $new_schema['primary key'])) !== FALSE) { unset($new_schema['primary key'][$key]); } // Handle possible index changes. foreach ($new_schema['indexes'] as $index => $fields) { foreach ($fields as $key => $field_name) { if ($field_name == $field) { unset($new_schema['indexes'][$index][$key]); } } // If this index has no more fields then remove it. if (empty($new_schema['indexes'][$index])) { unset($new_schema['indexes'][$index]); } } $this->alterTable($table, $old_schema, $new_schema); return TRUE;} |
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