Preserve arguments in uri builder

extbase, realurl, typo3, typo3-6.1.x, uribuilder

Solution

The uriBuilder has a `setAddQueryString` method, that does exactly what you want. It merges the current query string into the arguments:

$uri = $this->uriBuilder->setArguments(array('offset' => 321))->setAddQueryString(TRUE)->build();

As a reference here is the method copied from the actual class out of the TYPO3 core:

/**
 * If set, the current query parameters will be merged with $this->arguments. Defaults to FALSE.
 *
 * @param boolean $addQueryString
 * @return \TYPO3\CMS\Extbase\Mvc\Web\Routing\UriBuilder the current UriBuilder to allow method chaining
 * @api
 * @see TSref/typolink.addQueryString
 */
public function setAddQueryString($addQueryString) {
    $this->addQueryString = (boolean) $addQueryString;
    return $this;
}

Problem

Let's say that I have a page with URI: ``` http://mydomain.loc/index.php?id=123&by=name&dir=desc ``` and need to add/update/remove some other param (let's name it offset) to it, so after all it will be: ``` http://mydomain.loc/index.php?id=123&by=name&dir=desc&offset=321 ``` Unfortunately when building new link with `uriBuilder` like this ``` $uriBuilder = $this->uriBuilder; $uri = $uriBuilder->setArguments(array('offset' => 321))->build(); ``` I get only `index.php?id=123&offset=321` (no `by` and `dir` arguments anymore...) How can I force `uriBuilder` to preserve these arguments ? (manual rewriting arguments by `GeneralUtility::_GP(*)` isn't possible, cause they are theoretically unknown) Also `$_GET` array isn't good as I'm wrking with RealURL

Original source