如何通过laravel 8惯性中的模型访问关系

Question

我在users表和areas表之间有一个一对多的关系，当我返回配置文件数据时，我从users表中获取area_id，我需要使用models获取区域名称。有没有办法在纵断面图中获取面积名称？我尝试在show.vue中调用模型函数，但它不起作用。

User.php

 public function area()
    {
        return $this->belongsTo(Area::class);
    }

Area.php

 public function users()
    {
        return $this->hasMany(User::class);
    }

show.vue

<template>
    <app-layout>
        <template #header>
            <h2 class="font-semibold text-xl text-gray-800 leading-tight">
                Profile
            </h2>
            <h2 class="font-semibold text-xl text-gray-800 leading-tight">
                Area : 
            </h2>
        </template>

        <div>
            <div class="max-w-7xl mx-auto py-10 sm:px-6 lg:px-8">
                <div v-if="$page.props.jetstream.canUpdateProfileInformation">
                    <update-profile-information-form :user="$page.props.user" />

                    <jet-section-border />
                </div>

                <div v-if="$page.props.jetstream.canUpdatePassword">
                    <update-password-form class="mt-10 sm:mt-0" />

                    <jet-section-border />
                </div>

                <div v-if="$page.props.jetstream.canManageTwoFactorAuthentication">
                    <two-factor-authentication-form class="mt-10 sm:mt-0" />

                    <jet-section-border />
                </div>

                <logout-other-browser-sessions-form :sessions="sessions" class="mt-10 sm:mt-0" />

                <template v-if="$page.props.jetstream.hasAccountDeletionFeatures">
                    <jet-section-border />

                    <delete-user-form class="mt-10 sm:mt-0" />
                </template>
            </div>
        </div>
    </app-layout>
</template>

<script>
    import AppLayout from '@/Layouts/AppLayout'
    import DeleteUserForm from './DeleteUserForm'
    import JetSectionBorder from '@/Jetstream/SectionBorder'
    import LogoutOtherBrowserSessionsForm from './LogoutOtherBrowserSessionsForm'
    import TwoFactorAuthenticationForm from './TwoFactorAuthenticationForm'
    import UpdatePasswordForm from './UpdatePasswordForm'
    import UpdateProfileInformationForm from './UpdateProfileInformationForm'

    export default {
        props: ['sessions'],

        components: {
            AppLayout,
            DeleteUserForm,
            JetSectionBorder,
            LogoutOtherBrowserSessionsForm,
            TwoFactorAuthenticationForm,
            UpdatePasswordForm,
            UpdateProfileInformationForm,
        },
    }
</script>

Answer 1

您需要加载要手动显示的所有关系。与Blade不同，您不能仅仅访问与$user->area的关系，因为$user不是一个雄辩的实例，而是您将其作为JSON返回给您的Vue实例的内容。

从您的控制器调用$user->load('area')。这将使area对您可用。

Answer 2

我也遇到过同样的问题，但最终我发现了另一个技巧，我在模型中定义了另一个方法并添加了一个属性

在您的示例中:尝试以下命令: Area.php

class Area extends Model
{ ....
   $appends = ['users'];

   public function users()
    {
        return $this->hasMany(User::class);
    }
    
   // define a methode getUsersAttribute()
   public function getUsersAttribute(){
      return $this->users()->get();
   }