如何在请求数组中插入静态字段（Laravel 5.7）

I am having an issue with some small feature of a store function, and it seems that I didn't find any proper answer on the internet that will work for me.

I want to add static data in the array request, so that when sent data the field checked in the pivot table will be automatically filled with some integer.

I have the following tables:

Schema::create('mounter_evaluations', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('project_id')->index()->unsigned()->nullable();
    $table->text('mentions')->nullable();
    $table->softDeletes();
    $table->timestamps();
});  

Schema::create('mounter_procedures', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('mounter_norm_id')->index()->unsigned()->nullable();
    $table->string('detail');
    $table->softDeletes();
    $table->timestamps();
});

Schema::create('mounter_procedures_checks', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('mounter_evaluation_id')->unsinged()->nullable()->index();
    $table->integer('mounter_procedure_id')->unsinged()->nullable()->index();
    $table->integer('checked')->unsinged()->nullable();
    $table->timestamps();
});

The following models:

public function mounterevaluation() {
    return $this->belongsToMany(
        'App\MounterEvaluation',
        'mounter_procedures_checks',
        'mounter_evaluation_id',
        'mounter_procedure_id'
    )->withPivot(['checked']);
}

public function mounterprocedures() {
    return $this->belongsToMany(
        'App\MounterProcedures',
        'mounter_procedures_checks',
        'mounter_evaluation_id',
        'mounter_procedure_id'
    )->withPivot(['checked']);
}

Here is my store function:

public function store(Request $request, $idProiect) {
    $evaluation = MounterEvaluation::where('project_id', $idProiect)->first();
    if (!$evaluation) {
        $evaluation = new MounterEvaluation();
        $evaluation->project_id = $idProiect;
    }
    $evaluation->mentions = $request->mentions;
    $evaluation->save();

    // $request->request->add(['checked' => 1]);
    // $evaluation->mounterprocedures()->sync($request->procedures);

    // $evaluation->mounterprocedures()->sync($request->all() + ['checked' => 1]);
    $evaluation->mounterprocedures()->sync($request->procedures);
    // $request->request->add(['checked' => 1]);
    $evaluation->mounterprocedures()->request->add(['checked' => 1]);
    return response()->json($evaluation, 201);
}

Every time a person checks some filed in the evaluation form, this check is to be stored in the pivot table.

Put it in the $request array the simple way as you put values in any other array like so:

$request['new_key1'] = 'new value 1';
$request['new_key2'] = 'new value 2';

Here is how I know it works for sure, in your controller you have Request instance, passed as parameter and then you can add values normally like so:

namespace App\Http\Controllers;
use Illuminate\Http\Request;

public function example(Request $request)
{
     $request['new_key1'] = 'new value 1';
     $request['new_key2'] = 'new value 2';
     dd($request->input('new_key1'));//new value 1
}

In your case, if $request->procedures is an array then you could do:

$request->procedures = $request->procedures->toArray();
$request->procedures['checked'] = 1;
$evaluation->mounterprocedures()->sync($request->procedures);

I hope it helps