在视图中，我有一个如下所示的链接＆＃34;老师＆＃34;控制器。这个链接应该向另一个控制器发送一个id＆＃34; teacher_details＆＃34; （1对1的关系）。此链接打开一个网页，添加有关教师的更多详细信息。
TraversableOnce[Potato]我的控制器代码是
RDD[Potato]当我运行此代码时，它会向我显示一个错误，＃34;找不到ID＆＃34;。我究竟做错了什么。该链接未正确传递id参数。
路线文件
<%= link_to 'Add details', new_teacher_detail_path(@teacher), :id => "add_detail_link" %>
答案 0 :(得分：0)
您似乎没有在路由中使用Teacher模型嵌套TeacherDetail。
这就是为什么它没有在rank中获得任何<?php
$entities = getEntities();
$from = array();
$to = array();
foreach ($entities as $ent => $code) {
$from[] = '&' . $ent . ';';
$to[] = '&#' . $code . ';';
}
$str = 'ξ and τ';
// you can pass arrays to str_replace
// see http://php.net/manual/en/function.str-replace.php
echo str_replace($from, $to, $str);
function getEntities() {
// http://www.mit.edu/afs.new/sipb/project/php/include/entities.h
return array(
'AElig' => 198,
'Aacute' => 193,
'Acirc' => 194,
'Agrave' => 192,
'Alpha' => 913,
'Aring' => 197,
'Atilde' => 195,
'Auml' => 196,
'Beta' => 914,
'Ccedil' => 199,
'Chi' => 935,
'Dagger' => 8225,
'Delta' => 916,
'ETH' => 208,
'Eacute' => 201,
'Ecirc' => 202,
'Egrave' => 200,
'Epsilon' => 917,
'Eta' => 919,
'Euml' => 203,
'Gamma' => 915,
'Iacute' => 205,
'Icirc' => 206,
'Igrave' => 204,
'Iota' => 921,
'Iuml' => 207,
'Kappa' => 922,
'Lambda' => 923,
'Mu' => 924,
'Ntilde' => 209,
'Nu' => 925,
'OElig' => 338,
'Oacute' => 211,
'Ocirc' => 212,
'Ograve' => 210,
'Omega' => 937,
'Omicron' => 927,
'Oslash' => 216,
'Otilde' => 213,
'Ouml' => 214,
'Phi' => 934,
'Pi' => 928,
'Prime' => 8243,
'Psi' => 936,
'Rho' => 929,
'Scaron' => 352,
'Sigma' => 931,
'THORN' => 222,
'Tau' => 932,
'Theta' => 920,
'Uacute' => 218,
'Ucirc' => 219,
'Ugrave' => 217,
'Upsilon' => 933,
'Uuml' => 220,
'Xi' => 926,
'Yacute' => 221,
'Yuml' => 376,
'Zeta' => 918,
'aacute' => 225,
'acirc' => 226,
'acute' => 180,
'aelig' => 230,
'agrave' => 224,
'alefsym' => 8501,
'alpha' => 945,
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'ang' => 8736,
'aring' => 229,
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'igrave' => 236,
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'int' => 8747,
'iota' => 953,
'iquest' => 191,
'isin' => 8712,
'iuml' => 239,
'kappa' => 954,
'lArr' => 8656,
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'shy' => 173,
'sigma' => 963,
'sigmaf' => 962,
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'tau' => 964,
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'yen' => 165,
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'zeta' => 950,
'zwj' => 8205,
'zwnj' => 8204,
);
}
?>
参数。因此，您无法在以下操作中找到id。
new_teacher_detail_path尝试更改您的link_to，如下所示：
params[:id]现在您将正确获取ID参数。
答案 1 :(得分：0)
教师和详细信息的路由文件应如下所示：
resources :teachers do
get 'details/new', on: :member
end
然后在视图中你可以像这样使用link_to
<%= link_to 'Add details', details_new_teacher(@teacher) %>
无需更改控制器
答案 2 :(得分：0)
一对一的关系teacher_detail foreign_key为teacher_id，所以你可以这样使用
<%= link_to 'Add details', new_teacher_detail_path(id: @teacher.id), :id => "add_detail_link" %>