tt_news: no news_id given when changing language in single view - typo3

Question

I'm using TYP 4.5.5, RealURL 1.11.2 and tt_news 3.0.1. I want that the user can switch the language and the corresponding news is shown in the users language. All should work with RealURL.
When switching language the news id is not submitted. So I have to explicitely submit the id. I found some threads which showed me how it could work, but I didn't get it managed. Here is my TS:
lib.tslangmenu = COA
lib.tslangmenu {
10 = HTML
10.value(
<img src="fileadmin/templates/images/languages_en.png" width="48" height="121" alt="Languages" />
<div id="LanguageContents">
)
20 = HMENU
20.special = language
20.wrap = <div id="AvailableLanguages">|</div>
20.special.value = 0,1
20.1 = GMENU
20.1.NO {
XY = 24,16
5 = IMAGE
5.file = fileadmin/templates/images/deutsch.png || fileadmin/templates/images/englisch.png
additionalParams.cObject = COA
additionalParams.cObject {
5 = TEXT
5.wrap = &L=1
10 = TEXT
10.data = GPvar : tx_ttnews | backPid
10.wrap = &tx_ttnews[backPid]=|
10.required = 1
20 = TEXT
20.data = GPvar : tx_ttnews | tt_news
20.wrap = &tx_tt_news[tt_news]=|
20.required = 1
30 = TEXT
30.data = GPvar : cHash
30.wrap = &cHash=|
30.required = 1
}
}
30 = HTML
30.value(
<img class="languagebutton" src="fileadmin/templates/images/languages_en.png" width="48" height="121" alt="Languages" />
</div>
)
According to the information I found I should use additionalParams and set the parameter with GPVar. But I always get the no news_id given message.
Here is my RealURL Config:
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'] = array (
'_DEFAULT' => array (
'init' => array (
'enableCHashCache' => '1',
'appendMissingSlash' => 'ifNotFile',
'enableUrlDecodeCache' => '1',
'enableUrlEncodeCache' => '1',
),
'redirects' => array (
),
'preVars' => array (
'0' => array (
'GETvar' => 'no_cache',
'valueMap' => array (
'nc' => '1',
),
'noMatch' => 'bypass'
),
'1' => array (
'GETvar' => 'L',
'valueMap' => array (
'de' => '0',
'en' => '1',
),
'valueDefault' => 'de',
'noMatch' => 'bypass',
),
'2' => array (
'GETvar' => 'lang',
'valueMap' => array (
'de' => 'de',
'en' => 'en',
),
'noMatch' => 'bypass',
),
),
'pagePath' => array (
'type' => 'user',
'userFunc' => 'EXT:realurl/class.tx_realurl_advanced.php:&tx_realurl_advanced->main',
'spaceCharacter' => '-',
'languageGetVar' => 'L',
'expireDays' => '7',
'rootpage_id' => '1',
),
'fixedPostVars' => array (
),
'postVarSets' => array (
'_DEFAULT' => array (
'archive' => array (
'0' => array (
'GETvar' => 'tx_ttnews[year]',
),
'1' => array (
'GETvar' => 'tx_ttnews[month]',
'valueMap' => array (
'january' => '01',
'february' => '02',
'march' => '03',
'april' => '04',
'may' => '05',
'june' => '06',
'july' => '07',
'august' => '08',
'september' => '09',
'october' => '10',
'november' => '11',
'december' => '12',
),
),
),
'browse' => array (
'0' => array (
'GETvar' => 'tx_ttnews[pointer]',
),
),
'select_category' => array (
'0' => array (
'GETvar' => 'tx_ttnews[cat]',
),
),
'article' => array(
array(
'GETvar' => 'tx_ttnews[pointer]',
'valueMap' => array(),
'noMatch' => 'bypass',
),
array(
'GETvar' => 'tx_ttnews[tt_news]',
'lookUpTable' => array(
'table' => 'tt_news',
'id_field' => 'uid',
'alias_field' => 'title',
'addWhereClause' => ' AND NOT deleted',
'useUniqueCache' => 1,
'useUniqueCache_conf' => array(
'strtolower' => 1,
'spaceCharacter' => '-',
),
'languageGetVar' => 'L',
'languageExceptionUids' => '',
'languageField' => 'sys_language_uid',
'transOrigPointerField' => 'l18n_parent',
'autoUpdate' => 1,
'expireDays' => 180,
),
),
array (
'GETvar' => 'tx_ttnews[swords]',
),
),
),
),
Solution:
Seems that adding addQueryString does the job. Here is my final language switcher:
lib.tslangmenu = COA
lib.tslangmenu {
10 = HTML
10.value(
<img src="fileadmin/templates/images/languages.png" width="48" height="121" alt="Sprachen" />
<div id="LanguageContents">
)
20 = HMENU
20.special = language
20.wrap = <div id="AvailableLanguages">|</div>
20.special.value = 0,1
20.addQueryString = 1
20.1 = GMENU
20.1.NO {
XY = 24,16
5 = IMAGE
5.file = fileadmin/templates/images/deutsch.png || fileadmin/templates/images/englisch.png || fileadmin/templates/images/kroatisch.png
}
20.1.ACT < 20.1.NO
20.1.ACT = 1
20.1.ACT.wrap =<span class="langhide">|</span>
20.1.ACT {
XY = 24,16
5 = IMAGE
5.file = fileadmin/templates/images/deutsch.png || fileadmin/templates/images/englisch.png || fileadmin/templates/images/kroatisch.png
}
20.1.CUR < 20.1.ACT
20.1.CUR = 1
20.1.CUR{
XY = 24,16
5 = IMAGE
5.file = fileadmin/templates/images/deutsch.png || fileadmin/templates/images/englisch.png || fileadmin/templates/images/kroatisch.png
}
30 = HTML
30.value(
<img class="languagebutton" src="fileadmin/templates/images/languages.png" width="48" height="121" alt="Sprachen" />
</div>
)
}

Answer 1

Take a look at the following properties for your menu:
protectLvar
addQueryString <--- keeps the params to the string when switching languages.
TSREF is your friend:
http://typo3.org/documentation/document-library/core-documentation/doc_core_tsref/4.6.0/view/1/7/#id2635691

Answer 2

Your TypoScript has some errors:
20.wrap = &tx_tt_news[tt_news]=|
Remove tthe underscore:
20.wrap = &tx_ttnews[tt_news]=|
And do not set cHash by hand! 30.wrap = &cHash=| It will prevent your page from being cached, because the cHash will be wrong!