我可以使用另一个M:M实体创建自定义数据透视表名称吗


Can I create custom pivot table name using another M:M entity?

我还在想有没有办法创建一个自定义的透视表名称?因为我创建了一个文档用户表与document_user有多对多关系,后者是我的数据透视表,并且该表是为用户创建的已接收文档创建的。我计划为文档用户创建另一个数据透视表,该表用于发送的文档,这样我就可以拥有历史记录。请参阅下面的代码。

create_document_user_table

public function up()
 {
    Schema::create('document_user',function (Blueprint $table)
    {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->integer('document_id')->unsigned();
        $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
        $table->foreign('document_id')->references('id')->on('documents')->onDelete('cascade');
        $table->unsignedInteger('sender_id')->nullable();
        $table->foreign('sender_id')->references('id')->on('users')->onDelete('cascade');
        $table->dateTime('dateReceived')->default(DB::raw('CURRENT_TIMESTAMP'));
        $table->timestamp('dateModified')->default(DB::raw('CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP'));
    });
 }

文档表

public function up()
{
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->text('content');
        $table->integer('category_id')->unsigned();
        $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
        $table->timestamps();
    });
}

用户表

public function up()
{
    Schema::create('users', function (Blueprint $table) {
        $table->increments('id');
        $table->string('first_name');
        $table->string('last_name');
        $table->string('middle_name');
        $table->string('email');
        $table->string('username');
        $table->string('address');
        $table->string('password');
        $table->string('remember_token');
        $table->integer('role_permission_id')->unsigned();
        $table->foreign('role_permission_id')->references('id')->on('roles_permissions_dt')->onDelete('cascade');
        $table->timestamps();
    });
}

这可以很好地将记录插入到我的数据透视表中。我计划实现的是,每当我为文档插入记录时,它也会插入到我的自定义数据透视表中,而不仅仅是插入到document_user数据透视表。任何帮助都将不胜感激!感谢您的信息或提示。

更新

@米娜,谢谢你给我的提示,但实际上这是我为我的透视表插入或保存的。如何将其插入修订表?

文档控制器

public function postDocuments(Request $request)
{
    $this->validate($request,
    [
        'title' => 'required|regex:/(^[A-Za-z0-9 ]+$)+/|max:255',
        'content' => 'required',
        'category_id' => 'required',
        'recipient_id' => 'required',
    ]);     

    $document = new Document();
                                //Request in the form
    $document->title = $request->title;
    $document->content = $request->content;
    $document->category_id = $request->category_id;
    $document->save();
    $user = Auth::user();
    foreach($request->recipient_id as $recipientId)
    {
        $document->recipients()->sync([ $recipientId => ['sender_id' => $user->id]],false );
    }
    return redirect()->back();  
}

您可以随心所欲地调用数据透视表。

如前所述,要确定关系的连接表,Eloquent将加入两个相关的模型按字母顺序排列的名字。但是,您可以自由覆盖习俗您可以通过将第二个参数传递给belongsToMany方法:

return $this->belongsToMany('App'Role', 'user_roles');

(Eloquet:关系#多对多)

在你的情况下,你需要定义这样的关系:

class User extends Model
{
    // other stuff
    createdDocuments()
    {
        return $this->belongsToMany('App'Document', 'document_user_created');
    }
    sentDocuments() // or receivedDocuments()
    {
        return $this->belongsToMany('App'Document', 'document_user_sent');
    }
    // other stuff
}

class Document extends Model
{
    // other stuff
    createdByUsers()
    {
        return $this->belongsToMany('App'User', 'document_user_created');
    }
    sentToUsers() // or sentFromUsers() or whatever it does mean
    {
        return $this->belongsToMany('App'User', 'document_user_sent');
    }
    // other stuff
}

您不需要另一个透视表。你需要一张这样的桌子:

public function up()
{
    Schema::create('revisions', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('document_id')->unsigned();
        //Rest of table structure
        $table->foreign('document_id')->references('id')->on('document_user')->onDelete('cascade');
        $table->timestamps();
    });
}

当你需要创建一个新的修订版:

$document = new Document;
//add $document attributes
$user->documents()->save($document);
$document->recipients->each(function($recipient){
      $id = $recipient->pivot->id;
      Revision::create(['document_id'=>$id]);
})