php - Laravel Voyager: Dropdown that shows conditional relations

Question

I am using Laravel with Voyager for the back-end. I made a relationship between Posts model and Categories model. When adding a new Post, I can choose an according category using a dropdown.

How can I make this dropdown show Categories according to certain conditions? (Let's say, only subcategories)

Answer 1

您可以通过在外部模型中定义本地范围轻松过滤显示的关系选项。例如，如果您只想在关系输入中显示类别的活动条目，请创建Category模型中给定的范围，

public function scopeSubcategories($query){
    return $query->where('parent_id', '!=' , null);
}

现在，转到 BREAD 构建器并将以下内容添加到关系选项中

{
    "scope": "subcategories"
}

该值是您的范围方法的名称，不带范围一词。scopeSubcategories()的值为subcategories。