Question

当我运行php artisan migrate时，我收到如下错误：

In 2017_12_26_045926_create_table_articles.php line 41:

  Parse error: syntax error, unexpected 'public' (T_PUBLIC), expecting ',' or  
   ')'

这是我的文章表格：

    public function up()
    {
        Schema::create('articles', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('category_id');
            $table->string('title');
            $table->text('content');
            $table->boolean('is_show')->default(false);
            $table->boolean('is_active')->default(false);
            $table->integer('page_showing')->default(0);
            $table->string('header_pic');
            $table->softDeletes();
            $table->timestamps();


          Schema::table('articles', function($table){
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('articles');
    }
}

我正在为文章和评论添加外键，但迁移时的文章表会出现上述错误。怎么了？

Answer 1

错误是因为您再次使用了缺少结束标记的模式类“）};”并且不需要再次使用Schema类，您可以使用相同的对象向表中添加外键。请尝试以下代码：

public function up()
{
    Schema::create('articles', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->integer('category_id');
        $table->string('title');
        $table->text('content');
        $table->boolean('is_show')->default(false);
        $table->boolean('is_active')->default(false);
        $table->integer('page_showing')->default(0);
        $table->string('header_pic');
        $table->softDeletes();
        $table->timestamps();

        $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
        $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
    });
}

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    Schema::dropIfExists('articles');
}

OR

public function up()
{
    Schema::create('articles', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->integer('category_id');
        $table->string('title');
        $table->text('content');
        $table->boolean('is_show')->default(false);
        $table->boolean('is_active')->default(false);
        $table->integer('page_showing')->default(0);
        $table->string('header_pic');
        $table->softDeletes();
        $table->timestamps();


        Schema::table('articles', function($table){
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
        }); //closing Schema class tag
    });     //closing Schema class tag
}

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    Schema::dropIfExists('articles');
}

Answer 2

您错过了Schema::create

上的关闭

Schema::create('articles', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('category_id');
            $table->string('title');
            $table->text('content');
            $table->boolean('is_show')->default(false);
            $table->boolean('is_active')->default(false);
            $table->integer('page_showing')->default(0);
            $table->string('header_pic');
            $table->softDeletes();
            $table->timestamps();
});

Answer 3

在创建要放置foreigns的表时，您不需要更改表。

Schema::create('articles', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('user_id')->unsigned(); // Or $table->unsignedInteger('user_id');
    $table->integer('category_id')->unsigned();
    $table->string('title');
    $table->text('content');
    $table->boolean('is_show')->default(0);
    $table->boolean('is_active')->default(0);
    $table->integer('page_showing')->default(0);
    $table->string('header_pic');
    $table->softDeletes();
    $table->timestamps();

    $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
    $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
});

但是，您可以使用此代码正确执行此操作

Schema::create('articles', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('user_id')->unsigned();
    $table->integer('category_id')->unsigned();
    $table->string('title');
    $table->text('content');
    $table->boolean('is_show')->default(0);
    $table->boolean('is_active')->default(0);
    $table->integer('page_showing')->default(0);
    $table->string('header_pic');
    $table->softDeletes();
    $table->timestamps();

});
  Schema::table('articles', function($table){
    $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
    $table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
});

laravel db迁移获取错误

3 个答案: