laravel雄辩的模型强制保存? [英] laravel eloquent model casts on save?

问题描述

https://laravel.com/docs/5.4/eloquent-mutators #attribute-casting 例如

protected $casts = [ 'price' => 'integer', ];现在这将在检索值时强制转换.保存时，实际上我不确定$book->price = "20"会做什么，例如最有可能节省20.

protected $casts = [ 'price' => 'integer', ]; now this will cast when retrieving the value. When saving, I am actually not sure what $book->price = "20" will do, e.g. most likely it will save 20.

这是我的猜测，对吗?

That is my guess, is it right?

$book->someboolean和$casts =[ 'someboolean' -> 'boolean'];

$book->someboolean = 'false'; $book->save();

$book->someboolean = '0'; $book->save();

$book->someboolean = 0; $book->save();

$book->someboolean = null; $book->save();

它将存储什么?

推荐答案

$casts不适用于保存和更新方法.当您从模型中获取某些属性时，将调用该函数:__get()，toArray()或toJson().

$casts does not work on save and update methods. It is call when you get some property from model: __get(), toArray() or toJson().

对于MySQL::如果尝试保存"20"，则数据库可以根据列类型转换值:如果是整数，则将保存20，如果是布尔值，则为true.

For MySQL: if you try save "20", database can convert value depending on the column type: if it is integer - 20 will be saved, if boolean - true.

布尔型，布尔型:这些类型是TINYINT(1)的同义词.零值被认为是错误的.非零值被认为是正确的.

Bool, Boolean: These types are synonyms for TINYINT(1). A value of zero is considered false. Non-zero values are considered true.

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