如何傳遞外鍵 laravel

Question

我正在嘗試傳遞外鍵，但遇到此錯誤Base table or view already exists: 1050 Table 'favorites' already exists"我如何將所有外鍵和普通 id 傳遞給它們，例如$table->bigInteger('user_id')->unsigned();

表

 public function up()
{

    Schema::create('favorites', function (Blueprint $table) {
        $table->Increments('id');
        $table->bigInteger('user_id')->unsigned();
        $table->bigInteger('product_id')->unsigned();
        $table->timestamps();

    });

    Schema::create('favorites', function (Blueprint $table){

        $table->bigInteger('user_id')->unsigned()->index();
        $table->foreign('user_id')->references('id')->on('users');

        $table->bigInteger('product_id')->unsigned()->index();
        $table->foreign('product_id')->references('id')->on('products');
    });

}

public function down()
{
    Schema::dropIfExists('favorites');
}

Answer 1

您要遷移表兩次，在同一遷移中傳遞外鍵

public function up()
{
    Schema::create('favorites', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->bigInteger('user_id')->unsigned();
        $table->foreign('user_id')->references('id')->on('users');
        $table->bigInteger('product_id')->unsigned();
        $table->foreign('product_id')->references('id')->on('products');
        $table->timestamps();
    });
}

public function down()
{
    Schema::dropIfExists('favorites');
}

希望這可以幫助

Answer 2

請在您的表格中添加此表格字段

public function up()
{
    Schema::create('favorites', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->bigInteger('user_id')->unsigned();
        $table->foreign('user_id')->references('id')->on('users');
        $table->bigInteger('product_id')->unsigned();
        $table->foreign('product_id')->references('id')->on('products');
        $table->timestamps();
    });
}

Answer 3

其他答案是正確的。 如果您在做之前錯過了所需的任務，請試試這個

1) 移除或刪除已遷移的表

2）在遷移表中，刪除包含名稱“收藏夾”的記錄

3）用這個復制並粘貼“向上” function 里面的代碼

Schema::create('favorites', function (Blueprint $table) {
    $table->bigIncrements('id');
    $table->bigInteger('user_id')->unsigned();
    $table->bigInteger('product_id')->unsigned();
    $table->timestamps();

    $table->foreign('user_id')->references('id')->on('users');
    $table->foreign('product_id')->references('id')->on('products');

});

4) 再次運行此命令

php artisan migrate