根据每种类型选择最大的类型是一个常见的需求,可以通过使用Laravel Eloquent的join、max()和group by方法来实现。 首先,我们需要定义两个相关的模型,分别代表两个表。假设我们有一个"products"表和一个"categories"表,每个产品都属于一个特定的类别。 代码语言:txt ...
I received an email from a person asking for help showing the table of data with dynamic columns. In this tutorial, I will show you exactly how I did it. This will also be a good practice on these topics: groupBy()on Eloquent/Collections Seeding Data with Minimizing DB Queries Generating ...
If you do not want these columns to be automatically managed by Eloquent, you should define a $timestamps property on your model with a value of false:1<?php 2 3namespace App\Models; 4 5use Illuminate\Database\Eloquent\Model; 6 7class Flight extends Model 8{ 9 /** 10 * ...
5use Illuminate\Database\Eloquent\Relations\Pivot; 6 7class RoleUser extends Pivot 8{ 9 // 10}You can combine using and withPivot in order to retrieve columns from the intermediate table. For example, you may retrieve the created_by and updated_by columns from the RoleUser pivot table by...
create method to save a new model in a single line. The inserted model instance will be returned to you from the method. However, before doing so, you will need to specify either a fillable or guarded attribute on the model, as all Eloquent models protect against mass-assignment by ...
Eloquent 技巧分享:使用布尔值来作为 Group By Raw 条件 3 3 1 英文原文 / 翻译 / 0 / 1 / 创建于 5年前 我知道标题听起来不是很清楚,所以让我从一个例子开始。如果你数据库中有 birth_date 字段,并且想显示你有多少名成人年龄在 18 岁以上,并有几名儿童,你的 Eloquent 查询怎么构建?让我们来看看。
Did you ever think about using an alias in the select columns while using Laravel Eloquent?. We cannot say it’s very Laravel specific, rather a MySql feature. Basically, when you join two or more tables inMySql, chances are very high that you will have the same column names multiple tim...
但我怎样才能用Eloquent的语言来完成这个任务呢?created_at字段几乎总是随机的,因此我必须对值进行子串处理,以便它总是选择前10个字母,即2021-06-22。总和应该是组中所有字段的总和 I tried Summary::groupBy(DB::raw('substr(created_at, 0, 9)')) ...
Of course, you may not always want to select all columns from a database table. Using the select method, you can specify a custom select clause for the query:$users = DB::table('users')->select('name', 'email as user_email')->get(); ...
* @return \Illuminate\Database\Eloquent\Builder */ public function query(Administrator $model) { return $model->newQuery()->select('id', 'login_name', 'display_name', 'avatar', 'status', 'created_at', 'updated_at'); } /**