我有这个回应
[0] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 10
[question_choice_id] => 38
[choice_level] => 0
)
[1] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 11
[question_choice_id] => 44
[choice_level] => 0
)
[2] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 12
[question_choice_id] => 45
[choice_level] => 0
)
[3] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 13
[question_choice_id] => 50
[choice_level] => 0
)
[4] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 14
[question_choice_id] => 55
[choice_level] => 0
)
[5] => Array (
[category_id] => 2
[name] => Listening
[question_id] => 15
[question_choice_id] => 58
[choice_level] => 1
)
[6] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 1
[question_choice_id] => 2
[choice_level] => 0
)
[7] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 2
[question_choice_id] => 8
[choice_level] => 0
)
[8] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 3
[question_choice_id] => 9
[choice_level] => 0
)
[9] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 4
[question_choice_id] => 13
[choice_level] => 1
)
[10] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 5
[question_choice_id] => 19
[choice_level] => 0
)
[11] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 6
[question_choice_id] => 22
[choice_level] => 1
)
[12] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 7
[question_choice_id] => 25
[choice_level] => 1
)
[13] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 8
[question_choice_id] => 30
[choice_level] => 0
)
[14] => Array (
[category_id] => 1
[name] => Reading
[question_id] => 9
[question_choice_id] => 36
[choice_level] => 0
)
[15] => Array (
[category_id] => 3
[name] => Grammar
[question_id] => 31
[question_choice_id] => 122
[choice_level] => 0
)
[16] => Array (
[category_id] => 3
[name] => Grammar
[question_id] => 32
[question_choice_id] => 125
[choice_level] => 0
)
所以这里我有3个类别，Listening,Reading,Grammar很容易获得使用一个类别的用户的总百分比，但是我不知道如何获取这3个类别并将其存储在数组中以显示它在我看来。
我想使用公式
来获取用户百分比
得分= the_right_answer / total_count_array * 100
正确的答案在choice_level列中的值为1
因此，在我的示例中，公式应为
Reading
TOTAL = 2 / 9 * 100
Listening
TOTAL = 1 / 5 * 100
Grammar
TOTAL = 0 / 3 * 100
如何从该数组中获取总数？
一旦得到答案，我只是想将它们返回我的视图。
我还有一个会话，它是category_id，它是一个数组，我想我可以用它来从每个类别中获取结果。
$category_id = [1,2,3];
public function more_details(){
$category_id = Session::get('category_id'); //[1,2,3];
//more_details score of the user.
$score = Answer::get_user_more_details();
return view('pages.user.user_more_details', [
'title' => '',
]);
}
这是我的数据库查询，我可以在这里得到结果吗？而不是在我的后端编码？
SELECT answer.category_id,category.name,answer.question_id,answer.question_choice_id,choice.choice_level
FROM answers AS answer
LEFT JOIN categories AS category ON answer.category_id = category.id
LEFT JOIN question_choices AS choice ON answer.question_choice_id = choice.id
WHERE answer.user_set_id = 1 and answer.user_id = 3
Category_table
id(PK) | name
1 Reading
2 Listening
3 Grammar
Answer_table
id(PK) | category_id | question_id | question_choice_id
1 2 10 38
2 2 11 44
3 2 12 45
4 2 13 50
5 2 14 55
6 2 15 58
7 1 1 2
8 1 2 8
9 1 3 9
10 1 4 13
11 1 5 19
12 1 6 22
13 1 7 25
14 1 8 30
15 1 9 36
16 3 31 122
17 3 32 125
Question_choice_table
id(PK) | choice_level
38 0
44 0
45 0
50 0
55 0
58 1
2 0
8 0
9 0
13 1
19 0
22 1
25 1
30 0
36 0
122 0
125 0
有人可以帮助我吗？我真的不知道该怎么办。任何帮助将不胜感激。
答案 0 :(得分：1)
其中一种方法是使用Collections的groupBy方法。
$original_array = collect([]); // your array
$expected_array = [];
$grouped_array = $original_array->groupBy('name')->map(function ($item, $key)
use (&$expected_array) {
$expected_array[$key]['occurence'] = $item->where('choice_level', 1)->count();
$expected_array[$key]['total'] = $item->count();
$expected_array[$key]['percentage'] = ($expected_array[$key]['occurence'] / $expected_array[$key]['total']) * 100;
});
return view('your-view', compact('expected_array'));