Laravel模型获取方法解码JSON [英] Laravel Model Get Method Decoding JSON

问题描述

您好，下面是我存储在数据库中的内容，但是当我在模型中使用get方法时，在格式化数据时必须两次使用json_decode，为什么会发生这种情况，我能否以某种方式使用它一次?

Hi there below is what I'm storing in my db but when I use my get method in my model I have to use json_decode twice when formating my data why is this happening and can I have it just use it once somehow.

json:

"[{\"id\":\"1\",\"country\":\"New Zealand\",\"shipping_rate\":\"1\"},{\"id\":\"2\",\"country\":\"Australia\",\"shipping_rate\":\"2\"}]"

模型获取方法:

public function getshippingAttribute()
{
    return $this->attributes['shipping'] ? json_decode(json_decode($this->attributes['shipping'])) : [];
}

推荐答案

问题从您的问题来看还不够清楚，但是

The problem is not clear enough from your question but the Laravel offers a builtin mechanism for attribute casting (Since v-5.1). In this case, in your model, just declare a $casts property for example:

protected $casts = [
    'shipping' => 'array',
    // more ...
];

由于上面给出的 $ casts 属性，每当编写(创建/更新)模型时，您无需显式使用 json_encode 进行转换数组为 json 字符串， Laravel 将为您完成此操作，并且，当您检索模型(单个/集合)时，发货属性将自动转换回 array ，因此您无需使用 json_decode 即可处理该属性.

Because of the $casts property given above, whenever you'll write (create/update) a model, you don't need to explicitly use json_encode to convert the array to json string, Laravel will do it for you and also, when you'll retrieve the model (single/collection), the shipping attribute will be automatically converted back to an array so you don't need to use json_decode for working with the attribute.

关于响应，如果您不手动将其转换为 json (返回 model/collection 时)，laravel也将处理该响应.这可能会解决您的问题.

Regarding the response, that will be also handled by laravel if you don't convert it to json manually (when returning a model/collection). This will possibly solve your problem.

这篇关于Laravel模型获取方法解码JSON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！