[英]Unable to fetch data from Laravel Eloquent Relationships
i wanted access the value of content_type_id
.i tried like $courseChapters['chapter_content']['content_type_id']
, $courseChapters['content_type_id']
, $courseChapters[0]['content_type_id']
& $courseChapters['chapterContent']['content_type_id']
.All these shows the error ErrorException: Undefined index: content_type_id
.我想访问content_type_id
的值。我试过像$courseChapters['chapter_content']['content_type_id']
, $courseChapters['content_type_id']
, $courseChapters[0]['content_type_id']
& $courseChapters['chapterContent']['content_type_id']
。所有这些都显示错误ErrorException: Undefined index: content_type_id
。 I also tried everything in the foreach
loop i've commented below.我还尝试了我在下面评论的foreach
循环中的所有内容。 Nothing works.什么都行不通。 Can someone tell me how to fix this?有人可以告诉我如何解决这个问题吗?
$courseChapters = courseChapter::with(['chapterContent' => function ($q) use ($id) { $q->where('course_chapter_id', $id)->select('course_chapter_id','file_id','content_type_id');}])
->select('id','courseId', 'chapter_title', 'isExam', 'points')
->get()->toArray()[0];
/*foreach($courseChapters as $key){
// $contentTypeId=$key->first(); //Call to a member function first() on int
// $contentTypeId=$key->first()->chapter_content; //Call to a member function first() on int
// $contentTypeId=$key['chapter_content']['content_type_id']; //error - Illegal string offset
// $contentTypeId=$key[0]['content_type_id']; ////error - Illegal string offset
// $contentTypeId=$key['content_type_id']; //error - Illegal string offset 'content_type_id'
}*/
dd($courseChapters);
shows array like given below:显示如下所示的数组:
array:6 [
"id" => 4
"courseId" => 24
"chapter_title" => "chapter1"
"isExam" => false
"points" => 8
"chapter_content" => array:1 [
0 => array:3 [
"course_chapter_id" => 4
"file_id" => 1
"content_type_id" => 1
]
]
]
Like this to access the first像这样访问第一个
echo $courseChapters['chapter_content'][0]['content_type_id'];
or like this to access all of them或者像这样访问所有这些
foreach ($courseChapters['chapter_content'] as $chapter) {
echo $chapter['content_type_id'];
}
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