在 Laravel 多对多关系中，有没有办法更新数据透视 table 中的数据？

Question

我构建了用户和机构两个模型。添加其他数据透视列后，如何更新它们之间的数据透视数据？

<?php

class User extends Authenticatable
{
    public function institutions()
    {
        $pivots = ['id', 'program_choice', 'session'];
        return $this->belongsToMany('App\Institution')
            ->withPivot($pivots);
    }
}


class Institution extends Authenticatable
{

    public function users()
    {
        $pivots = ['id', 'program_choice', 'session'];
        return $this->belongsToMany('App\User', 'institution_user')
            ->withPivot($pivots);;
    }
}

这是迁移

class CreateUsersTable extends Migration
{
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('password');
            $table->integer('user_id')->unsigned();
            $table->rememberToken();
            $table->timestamps();
        });
    }

class CreateInstitutionsTable extends Migration
{
    public function up()
    {
        Schema::create('institutions', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name')->unique();
            $table->string('city')->nullable();
            $table->string('state')->nullable();
            $table->string('country')->nullable();
            $table->string('address')->nullable();
            $table->string('user_id')->nullable();
            $table->string('postal_code')->nullable();
            $table->timestamps();
        });
    }
}

这就是支点 table 的样子

我能够将信息附加到数据透视表 table

public function storeInstitution(Request $request)
    {
        $user_id = auth()->user()->id;
        $user = User::find($user_id);
        $institution_id = $request->input('institution_id');
        $user_program_choice = $request->input('program_choice');
        $user_session = $request->input('session');
        $user_inst =   array(
            'program_choice' => $user_program_choice,
            'session'        => $user_session,
            'user_id'        => $user_id,
            'institution_id' => $institution_id
        );
        $user->institutions()->attach($institution_id, $user_inst);
        return 'success';
    }

但无法更新附加的枢轴例如我无法将 program_choice、particle physics 更改为 digital art
这是我当前的代码

 public function updateInstitutions(Request $request, $pivot_id)#TODO id is pivot_id
    { 
        $user_id = auth()->user()->id;
        $user = User::find($user_id);
        $institution_id = $request->input('institution_id');
        $pivot_attributes =   array(
            'user_id'        => $user_id,
            'institution_id' => $institution_id,
            'session'        => $request->input('session'),
            'program_choice' => $request->input('program_choice'),
        );

        $user->institutions()->updateExistingPivots($institution_id, $pivot_attributes, false);
        return 'success';

    }

如何使用数据透视 ID 更新我的数据透视数据？

Answer 1

检查the documentation这方面的内容。

Updating A Record On A Pivot Table

If you need to update an existing row in your pivot table, you may use updateExistingPivot method. This method accepts the pivot record foreign key and an array of attributes to update:
$user = App\Models\User::find(1);

$user->roles()->updateExistingPivot($roleId, $attributes);

在 Laravel 多对多关系中，有没有办法更新数据透视 table 中的数据？

In Laravel many-to-many relationship, is there a way to update data in a pivot table?

many-to-many

laravel

eloquent

Updating A Record On A Pivot Table