如何获取父表id并将其存储到其子laravel中

为了找到更好的方法，我找了很多。我已经读过了

Eloquent将尝试将子模型中的父id与id匹配 在父模型上

我有和

Idea

和

Document

表格。他们有1:M的关系。一个

Idea

可以有多个文档，而一个文档只能与一个

Idea

相关

我无法获取要存储的父表id

控制器功能：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

文档模型：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

创意模式：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

请解释将父表id存储到子表的过程。谢谢

编辑：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

我对这种关系很困惑。现在工作一段时间，我想不出来

创意模式：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

文档架构：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

---

您不需要手动设置ID，Eloquent会为您这样做：

documents（）

返回具有存储相关模型的保存方法的关系：

$idea->documents()->save($document);

它甚至有一个

saveMany（）

方法一次存储多个：

$idea->documents()->saveMany($documents);

更新：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

您应该将其放入存储库类中。外键假定为idea\u id，但有一秒 传递给hasMany方法的ond参数，如果已构建架构，则可以重写该参数：

public function documents() {
    $this->hasMany("\App\Document", "your_foreign_key_here");
}

相关的laravel文档如下所示

希望有帮助

更新：

public function storeDocuments(DocumentRequest $request) {

  if($request->hasFile('doc_name')) {
      $filename = $request->file('doc_name')->getClientOriginalName();
      $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $doc->save();
}

public function idea() {
    return $this->belongsTo('App\Idea');
}

public function documents() {
    return $this->hasMany('App\Document');
}

public function storeDocuments(DocumentRequest $request) {

    if($request->hasFile('doc_name')) {
        $filename = $request->file('doc_name')->getClientOriginalName();
        $moveFile = $request->file('doc_name')->move('documents/', $filename);
    }
    $doc = new Document();
    $doc->doc_name = $moveFile;
    $idea = Idea::find(1); //how to get idea_id here???????
    $idea->documents()->save($doc);
    return back();
}

public function up()
{
    //
    Schema::create('ideas', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('idea_title');
        $table->string('idea_info', 150);
        $table->string('idea_image');
        $table->string('selection');
        $table->longText('idea_description');
        $table->string('idea_location');
        $table->integer('idea_goal')->unsigned();
        $table->integer('pledge_amount')->unsigned();
        $table->string('set_equity')->nullable();
        $table->boolean('status')->default(0);
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

public function up()
{
    //
    Schema::create('documents', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('idea_id')->unsigned();
        $table->string('doc_name');
        $table->rememberToken();
        $table->timestamps();
        $table->softDeletes();
    });
}

$idea_id = $idea->id; // assuming the ID field is not overriden in your schema/model

它只是简单地使用idea表的主键值，与find方法中使用的值相同。默认情况下，一对多关系通过联接工作，并使用父主键值联接子表记录

IDEA           DOCUMENT   
-----------   ---------------
|   id    |-->| idea_id | id |
|   1     |   |    1    |  1 |
|   2     |   |    1    |  2 |
-----------   ---------------- 

好的，在SQL中重新生成查询。基本上，每个模型表示一个表，表中的每个记录表示该模型类的一个实例。要查询它们，您需要在该表上有一个主键字段，以便每个记录都由该字段标识。在Elount中默认为“id”

当我们谈到关系时，我们需要另一个字段来连接上的相关表。在这种特殊情况下，它将是文档表中的idea_id字段。当获取与ID为1的想法相关联的文档时，相关文档的“idea_ID”字段中将有1，因为它们与ID为1的想法相连接。 SQL查询看起来像：

SELECT * FROM document JOIN idea ON document.idea_id = idea.id WHERE idea.id = 1

但正如我已经说过的，您不必显式地存储该值，因为雄辩可以做到这一点

请给我看一下您的文档和想法表或迁移模式好吗

更新

公共功能存储文档（DocumentRequest$request）{

---

}

由于每个

文档

必须与

创意

相关，因此控制器功能中必须有

创意

id或型号。要么你需要在表单中选择一个想法，要么你有嵌套的资源。如果我理解正确的话。您希望将想法与文档一起保存。但是您想检索最后一个Id来添加特定想法的文档吗？我是我，对吗？我需要在哪里添加这行？在

存储文档中

？你能再解释一下吗？谢谢，教授，但我太困惑了，仍然无法得到你。主键是

Idea

表中的

id

，我对这个

$Idea

变量相关的东西很困惑。如果您能重构我的

storeDocuments

函数，那就太好了。谢谢