Weak hands cannot be planted, meager skills have no foundation. Shallow wisdom is futile, how can one hope for a good name?扰扰从役倦，屑屑身事微。少壮轻年月，迟暮惜光辉。
change_column( $this->get_table_name(), 'title', 'text', [ 'null' => true ] );
$this->change_column( $this->get_table_name(), 'open_graph_title', 'text', [ 'null' => true ] );
$this->change_column( $this->get_table_name(), 'twitter_title', 'text', [ 'null' => true ] );
$this->change_column( $this->get_table_name(), 'open_graph_image_source', 'text', [ 'null' => true ] );
$this->change_column( $this->get_table_name(), 'twitter_image_source', 'text', [ 'null' => true ] );
}
/**
* Migration down.
*
* @return void
*/
public function down() {
$attr_limit_191 = [
'null' => true,
'limit' => 191,
];
$this->change_column(
$this->get_table_name(),
'title',
'string',
$attr_limit_191,
);
$this->change_column(
$this->get_table_name(),
'opengraph_title',
'