prepareKeys() protected method Prepares the keys associated with the currently available data models. protected array prepareKeys ( $models )$models array The available data models return array The keys

findConstraints() protected method Collects the foreign key column details for the given table. protected void findConstraints ( $table )$table yii\db\TableSchema The table metadata

$interactive public property Whether to run the command interactively. public boolean $interactive = true

isOldMssql() protected method protected boolean isOldMssql ( )return boolean Whether the version of the MSSQL being used is older than 2012. throws yii\base\InvalidConfigException throws yii\db\Exception

getView() public method public yii\web\View getView ( )return yii\web\View View instance.

dropCommentFromTable() public method (available since version 2.0.8) Builds a SQL command for adding comment to table public string dropCommentFromTable ( $table )$table string The table whose column is to be commented. The table name will be properly quoted by the method. return string The SQL statement for adding comment on column

safeDown() public method This method contains the logic to be executed when removing this migration. This method differs from down() in that the DB logic implemented here will be enclosed within a DB transaction. Child classes may implement this method instead of down() if the DB logic needs to be within a transaction. public boolean safeDown ( )return boolean Return a false value to indicate the migration fails and should not proceed further. All other return values mean the migration s

loadColumnSchema() protected method Loads the column information into a yii\db\ColumnSchema object. protected yii\db\ColumnSchema loadColumnSchema ( $info )$info array Column information return yii\db\ColumnSchema The column schema object

addCommentOnColumn() public method (available since version 2.0.8) Builds a SQL command for adding comment to column public string addCommentOnColumn ( $table, $column, $comment )$table string The table whose column is to be commented. The table name will be properly quoted by the method. $column string The name of the column to be commented. The column name will be properly quoted by the method. $comment string The text of the comment to be added. The comment will be properly quoted

read() public method Advances the reader to the next row in a result set. public array read ( )return array The current row, false if no more row available