Question

如果我尝试保存外键，那么我的laravel关系不起作用。

客户迁移

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

查询迁移

Schema::create('inquiries', function(Blueprint $table)
{
    $table->increments('id');
    $table->unsignedInteger('client_id')->nullable();
    $table->unsignedInteger('device_id')->nullable();
    $table->string('android_device_token')->default('');
    $table->integer('status')->default(0);
    $table->timestamps();
    $table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
    $table->foreign('device_id')->references('id')->on('devices')->onDelete('cascade');
});

尝试发送请求并像这样保存，但数据库一直显示为空

$data = array(
    "device_id" => $request->input('device_id'),
    "client_id" => Client::find($request->input('client_id'))->id,
    "android_device_token" => $inquiry->android_device_token,
    "status" => $request->input('status')
);
$inquiry->fill($data);
$inquiry->save();

模型关系：

询问：

public function client()
{
    return $this->hasOne(Client::class);
}

客户端：

protected $table = 'inquiries';
protected $fillable = ['client_id', 'device_id', 'android_device_token', 'status'];

public function inquiry()
{
    return $this->hasMany(Inquiry::class);
}

Answer 1

好的，我知道模型和控制器中的问题。

这是我的代码：

<强> Client.php

public function inquiries () {
    // if the relation is one to many
    return $this->hasMany(Inquiry::class);

    // if th relation is one to one
    return $this->hasOne(Inquiry::class);
}

<强> Inquiry.php

public function client () {
    // It should use belongsTo
    return $this->belongsTo(Client::class);
}

在您的控制器中应该是：

<强>控制器

$client = Client::find($request->input('client_id'));
$inquiry = new Inquiry;
$data = array(
    "device_id" => $request->input('device_id'),
    "android_device_token" => $inquiry->android_device_token,
    "status" => $request->input('status')
);
$inquiry->fill($data);
$inquiry->client()->associate($client); // set the foreign key
$inquiry->save(); // save the inquiry

修改如果它是由填充方法引起的。我认为在您的控制器中您应该将其更改为：

// Get the client $client = Client::find($request->input('client_id')); // Initiate the Inquiry model; $inquiry = new Inquiry; $inquiry->device_id = $request->input('device_id'); $inquiry->android_device_token = $inquiry->android_device_token; $inquiry->status = $request->input('status'); $inquiry->client()->associate($client); $inquiry->save();

希望它可以帮到你：D

Answer 2

查询模型应具有belongsTo关系：

查询模式关系：

public function client()
{
    return $this->belongsTo(Client::class);
}

客户端模型关系：

public function inquiries()
{
    return $this->hasMany(Inquiry::class);
}

此外，您可以在关系上使用save方法来保存查询：

$client = Client::find($request->input('client_id'));

$inquiry = new Inquiry();
$inquiry->fill(array(
    "device_id" => $request->input('device_id'),
    "android_device_token" => $inquiry->android_device_token,
    "status" => $request->input('status')
));
$client->inquiries()->save($inquiry);

Laravel外键为null

2 个答案: