何时在查询laravel 5中使用get() [英] when to use get() in query laravel 5

问题描述

我在laravel资源的show方法中设置了一个基本查询

I have a basic query set up in the show method of a laravel resource

public function show($id){
     $results = Student::find($id);

     $drives= Drive:: where('student_id', $id);
}

对$ results的查询非常有效.除非我在$ drives的末尾执行-> get()，否则该查询将不起作用.为什么是这样?这两个查询之间有什么区别，所以一个查询需要-> get()而另一个不需要?解决这个问题花了我大约5个小时的时间，我只是对它背后的功能感到好奇，所以我将来可以避免这种头痛.

The query for $results works perfectly. The query for $drives does not work unless I do ->get() at the end of it. Why is this? what's the difference between the two queries so that one requires the ->get() and the other does not? Solving this problem took me like 5 hrs and i'm just curious as to the functionality behind it so i can avoid this headache in the future.

推荐答案

某些eloquent表达式隐式具有get.那些由Query Builder进行的通话将需要->get()调用，而find(), findOne()...则不需要get().

Some eloquent expressions have a get implicitly. Those ones who are made by a Query Builder will need a ->get() call, find(), findOne()... won't need a get().

https://laravel.com/docs/5.6/eloquent#retrieving-models

https://laravel.com/docs/5.6/queries

这篇关于何时在查询laravel 5中使用get()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！