問題描述
我想獲取每個(gè)月的數(shù)量總和，以便我可以在條形圖上顯示每月的數(shù)量
I would like to fetch sum of quantity in each month, so that I can display on bar chart quantities against month
這就是我想的，但沒有鍛煉
This is what I thought but didn't workout
$data1 = Borrow::groupBy(function($d) {
return Carbon::parse($d->created_at)->format('m')->sum('quantity');
})->get();
我的表結(jié)構(gòu)
Schema::create('borrows', function (Blueprint $table) {
$table->increments('id');
$table->integer('member_id');
$table->integer('book_id');
$table->integer('quantity');
$table->integer('status')->default(0);
$table->timestamps();
});
推薦答案
that a collection group by not an eloquent groupby
that a collection group by not an eloquent groupby
如果你想用 eloquent 來做，必須:
if you want to do it with eloquent, gotta:
$data1 = Borrow::selectRaw('SUM(quantity) as qt, MONTH(created_at) as borrowMonth')
->groupBy('borrowMonth')->get();
如果你想用集合 groupBy 方法來做，你應(yīng)該先做 get，然后是 groupBy.
if you want to do it with the collection groupBy method, you should first do the get, then the groupBy.
就像，雖然我不確定你在回調(diào)中所做的事情要完成什么..
As in, though im not sure what you're trying to accomplish with what you do inside the callback..
$data1 = Borrow::get()->groupBy(function($d) {
return Carbon::parse($d->created_at)->format('m')->sum('quantity');
});
這篇關(guān)于Laravel 使用 Sum 和 Groupby的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！