Question

我有3张桌子

模型网址

class Url extends Model
{
    public function users(){
        return $this->belongsToMany(User::class);
    }
    public function url_status(){
        return $this->hasMany(UrlStatus::class);
    }
}

模型UrlStatus

class UrlStatus extends Model
{
    public function url()
    {
        return $this->belongsTo(Url::class);
    }
}

模型用户

class User extends Authenticatable
{
    use Notifiable, SoftDeletes, HasRoles;
    public function urls(){
        return $this->belongsToMany(Url::class);
    }
}

在我的控制器中，我正在查询：

$url = Url::with('url_status','users')->where('list_status', true)->get();

如何获取最新的url_status？

编辑---

这是我的迁移文件中每个表的结构

用于网址表

 Schema::create('urls', function (Blueprint $table) {
            $table->increments('id');
            $table->string('url');
            $table->string('description');
            $table->boolean('list_status');
            $table->timestamps();
        });

URL状态

Schema::create('url_status', function (Blueprint $table) {
            $table->increments('id');
            $table->unsignedInteger('url_id');
            $table->integer('status_code');
            $table->string('status');
            $table->boolean('sms');
            $table->boolean('email');
            $table->timestamps();
        });

用户表

Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('email')->unique();
            $table->string('contacts');
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
            $table->softDeletes();
        });

Answer 1

您也可以这样尝试

模型网址

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/whacksView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="WHACKS"
            android:textSize="24sp"
            android:textAlignment="center"/>
        <TextView
            android:id="@+id/maxWhacksView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAlignment="center"
            android:text="MAX WHACKS"
            android:layout_weight="1"
            android:textSize="24sp"/>
    </LinearLayout>

    <TextView
        android:id="@+id/time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAlignment="center"
        android:text="60"
        android:textSize="24sp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/numberOfWhacksView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="0"
            android:textAlignment="center"
            android:textSize="24sp"/>
        <TextView
            android:id="@+id/numberOfMaxWhacksView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAlignment="center"
            android:text="0"
            android:layout_weight="1"
            android:textSize="24sp"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:id="@+id/cl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:layout_weight="1"/>
        <Button
            android:id="@+id/nl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:layout_weight="1"/>
        <Button
            android:id="@+id/sl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:layout_weight="1"/>
    </LinearLayout>

    <Button
        android:id="@+id/startButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Start" />

    <Button
        android:id="@+id/cancelButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Cancel" />

</LinearLayout>

以这种方式获取

public function latestUrlStatus(){
    return $this->hasOne(UrlStatus::class)->latest();
}

Answer 2

尝试将latest()方法与first()一起使用：

$url = Url::with('url_status','users')->where('list_status', true)->whereHas('url_status', function($q){
     $q->latest()->first();
})->get();

如果您要获取给定URL的最新url_status，可以这样进行：

$url->url_status->latest()->first();

从不同关系中获取最新信息雄辩的laravel

2 个答案: