如何从 MySql table 中输出排名靠前的读者？

Question

我想从图书馆管理系统中输出排名靠前的读者，看看今年谁阅读最多，但我被查询构建卡住了。

我有 3 个 table，

书籍

id	name
1	name of the book1
2	name of the book2
3	name of the book3
4	name of the book4

book_issues

id	student_id	book_id	issue_date
1	1	1	2022-05-09
2	2	3	2022-05-01
3	3	5	2022-05-06
2	2	2	2022-05-08
3	2	1	2022-05-03

和学生

id	name
1	name of the student1
2	name of the student2
3	name of the student3
4	name of the student4

这是我的控制器

public function topmonth_wise()
{
    return view('report.topmonthWise', ['books' => '']);
}

public function generate_topmonth_wise_report(Request $request)
{
    $request->validate(['month' => "required|date"]);
    return view('report.topmonthWise', [
        'books' => book_issue::where('issue_date', 'LIKE', '%' . $request->month . '%')
               // ->select(student::raw('count(book_id) as top'))
                //->groupBy('top')
                //->orderBy('top', 'DESC')
                ->limit(10)
                //->latest()
                ->get(),
    ]);
}

这是我的观点：

<table class="content-table">
    <thead>
        <th>Nr. Crt</th>
        <th>Nume elev</th>
        <th>Total carti citite</th>
        
    </thead>
    <tbody>
        @forelse ($books as $book)
            <tr>
                <td>{{ $book->id }}</td>
                <td>{{ $book->student->name }}</td>
                <td>{{ $book->count() }}</td>
                
            </tr>
        @empty
            <tr>
                <td colspan="10">Nu s-au găsit înregistrări!</td>
            </tr>
        @endforelse
    </tbody>
</table>

这是我的模型：

public function student(): BelongsTo
{
    return $this->belongsTo(student::class, 'student_id', 'id');
}

/**
 * Get the book that owns the book_issue
 *
 * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
 */
public function book(): BelongsTo
{
    return $this->belongsTo(book::class, 'book_id', 'id');
}

我想在我的视图中显示本月的热门读者，但如果我使用来自控制器的代码，我会收到错误消息我想要的只是显示这样的 table 的视图：

id	student name	total books read
1	student name 2	3
2	student name 1	1
3	student name 3	1

如果你想看其他文件我给你问问谁能帮帮我？

Answer 1

您需要按 student_id 分组，然后您需要计算该特定 id 内的项目总数。

//here we loaded students as well as we need to know the name
//and then group by `student_id`

$book_issues = book_issue::with('student')
->where('issue_date', 'LIKE', '%' . $request->month . '%')
->get()
->groupBy('student_id');

$row = 1;
@foreach($book_issues as $k => $v)
    <tr>
        <td>{{$row}}</td>
        <td>{{$v->first()->student->name}}</td>
        <td>{{$$v->count()}}</td>
    </tr>
    <?php 
        $row++;
    ?>
@endforeach

如何从 MySql table 中输出排名靠前的读者？

How do I output top readers from MySql table?

php

mysql

laravel