Php 如何修复此错误错误错误号：150“；“外键约束格式不正确”；

我想在laravel中迁移acl迁移，但出现了此错误

错误

150“外键约束格式不正确”

表格

public function up()
    {


        Schema::create('roles', function (Blueprint $table) {
            $table->Increments('id');
            $table->string('title_fa');
            $table->string('title_en');
            $table->timestamps();
        });

        Schema::create('permissions', function (Blueprint $table) {
            $table->Increments('id');
            $table->string('title_fa');
            $table->string('title_en');
            $table->timestamps();
        });

        Schema::create('role_user', function (Blueprint $table) {
            $table->integer('role_id');
            $table->integer('user_id');

            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onUpdate('cascade')
                ->onDelete('cascade');
            $table->foreign('user_id')
                ->references('id')
                ->on('users')
                ->onUpdate('cascade')
                ->onDelete('cascade');
        });

        Schema::create('permission_role', function (Blueprint $table) {
            $table->integer('permission_id');
            $table->integer('role_id');

            $table->foreign('permission_id')
                ->references('id')
                ->on('permissions')
                ->onUpdate('cascade')
                ->onDelete('cascade');
            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onUpdate('cascade')
                ->onDelete('cascade');
        });
    } 

---

我尝试对角色id和用户id使用unsign integer

id

，我尝试了：

 $table->primary(['role_id','user_id']);

---

但对我来说并不是这样的

您想将整数更改为无符号的biginteger，如下所示：

public function up() {

    Schema::create('roles', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->string('title_fa');
        $table->string('title_en');
        $table->timestamps();
    });

    Schema::create('permissions', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->string('title_fa');
        $table->string('title_en');
        $table->timestamps();
    });

    Schema::create('role_user', function (Blueprint $table) {
        $table->unsignedBigInteger('role_id');
        $table->unsignedBigInteger('user_id');

        $table->foreign('role_id')
            ->references('id')
            ->on('roles')
            ->onUpdate('cascade')
            ->onDelete('cascade');
        $table->foreign('user_id')
            ->references('id')
            ->on('users')
            ->onUpdate('cascade')
            ->onDelete('cascade');
    });

    Schema::create('permission_role', function (Blueprint $table) {
        $table->unsignedBigInteger('permission_id');
        $table->unsignedBigInteger('role_id');

        $table->foreign('permission_id')
            ->references('id')
            ->on('permissions')
            ->onUpdate('cascade')
            ->onDelete('cascade');
        $table->foreign('role_id')
            ->references('id')
            ->on('roles')
            ->onUpdate('cascade')
            ->onDelete('cascade');
    });
} 

---

要将整数更改为无符号biginteger，如下所示：

public function up() {

    Schema::create('roles', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->string('title_fa');
        $table->string('title_en');
        $table->timestamps();
    });

    Schema::create('permissions', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->string('title_fa');
        $table->string('title_en');
        $table->timestamps();
    });

    Schema::create('role_user', function (Blueprint $table) {
        $table->unsignedBigInteger('role_id');
        $table->unsignedBigInteger('user_id');

        $table->foreign('role_id')
            ->references('id')
            ->on('roles')
            ->onUpdate('cascade')
            ->onDelete('cascade');
        $table->foreign('user_id')
            ->references('id')
            ->on('users')
            ->onUpdate('cascade')
            ->onDelete('cascade');
    });

    Schema::create('permission_role', function (Blueprint $table) {
        $table->unsignedBigInteger('permission_id');
        $table->unsignedBigInteger('role_id');

        $table->foreign('permission_id')
            ->references('id')
            ->on('permissions')
            ->onUpdate('cascade')
            ->onDelete('cascade');
        $table->foreign('role_id')
            ->references('id')
            ->on('roles')
            ->onUpdate('cascade')
            ->onDelete('cascade');
    });
}