tambah data menggunakan laravel 11

saya sudah mengotak atik nya menggunakan berbagai metode tapi masi belum berhasil,sudah saya coba menggunakan query builder tapi hasilnya nihil berikut controller nya :

<?php
namespace App\Http\Controllers\admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Instalasi;
use App\Models\DPInstalasi;  // Impor model DPInstalasi
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\DB;
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
class InstalasiController extends Controller                     
{   
    public function instalasi()
    {
        // Mengambil data instalasi dari database
        $instalasi = DB::table('instalasi')->select('id_instalasi', 'nama_cs', 'alamat', 'tanggal')->get();
        
        // Mengirim data ke view
        return view('admin.instalasi', ['instalasi' => $instalasi]);
    }
    

    public function tambah()
    {
        // Menampilkan formulir instalasi
        return view('admin.form_instalasi');
    }
 

    public function simpan(Request $request)
    {
        // Log data request untuk debugging
    Log::info('Request Data:', $request->all());

        // Validasi data form
        $validatedData = $request->validate([
            'no_iwo' => 'required',
            'id_cs' => 'required',
            'nama_cs' => 'required',
            'tanggal' => 'required|date',
            'alamat' => 'required',
            'kota' => 'required',
            'kode_pos' => 'required',
            'jenis_layanan' => 'required',
            'bandwidth_intl_ix' => 'required',
            'bandwidth_lokal_iix' => 'required',
            'jumlah_rak' => 'required',
            'no_rak' => 'required',
            'block_ip_wan_cs' => 'required',
            'block_ip_lan' => 'required',
            'gateway_ip' => 'required',
            'primary_dns' => 'required',
            'secondary_dns' => 'required',
            'detail_pekerjaan' => 'required',
            'ping' => 'required',
            'trace_route' => 'required',
            'browsing' => 'required',
            'download' => 'required',
            'speed' => 'required',
            'nama_teknisi' => 'required',
            'nama_cs_ttd' => 'required',
            'ttd_teknisi' => 'required',
            'ttd_cs' => 'required',
            'dp_instalasi.*.nama_perangkat' => 'required',
            'dp_instalasi.*.merk' => 'required',
            'dp_instalasi.*.nomor_seri' => 'required',
            'dp_instalasi.*.jumlah' => 'required|integer',
            'dp_instalasi.*.satuan' => 'required',
        ]);
    
        // Simpan data tanda tangan
        $teknisiSignature = $this->saveSignature($request->input('ttd_teknisi'), 'ttd_teknisi');
        $customerSignature = $this->saveSignature($request->input('ttd_cs'), 'ttd_cs');
    
        // Simpan data instalasi
        $instalasi = Instalasi::create([
            'no_iwo' => $validatedData['no_iwo'],
            'id_cs' => $validatedData['id_cs'],
            'nama_cs' => $validatedData['nama_cs'],
            'tanggal' => $validatedData['tanggal'],
            'alamat' => $validatedData['alamat'],
            'kota' => $validatedData['kota'],
            'kode_pos' => $validatedData['kode_pos'],
            'jenis_layanan' => $validatedData['jenis_layanan'],
            'bandwidth_intl_ix' => $validatedData['bandwidth_intl_ix'],
            'bandwidth_lokal_iix' => $validatedData['bandwidth_lokal_iix'],
            'jumlah_rak' => $validatedData['jumlah_rak'],
            'no_rak' => $validatedData['no_rak'],
            'block_ip_wan_cs' => $validatedData['block_ip_wan_cs'],
            'block_ip_lan' => $validatedData['block_ip_lan'],
            'gateway_ip' => $validatedData['gateway_ip'],
            'primary_dns' => $validatedData['primary_dns'],
            'secondary_dns' => $validatedData['secondary_dns'],
            'detail_pekerjaan' => $validatedData['detail_pekerjaan'],
            'ping' => $validatedData['ping'],
            'trace_route' => $validatedData['trace_route'],
            'browsing' => $validatedData['browsing'],
            'download' => $validatedData['download'],
            'speed' => $validatedData['speed'],
            'nama_teknisi' => $validatedData['nama_teknisi'],
            'nama_cs_ttd' => $validatedData['nama_cs_ttd'],
            'ttd_teknisi' => $teknisiSignature,
            'ttd_cs' => $customerSignature,
        ]);

        // Log data instalasi untuk debugging
    Log::info('Instalasi Data:', $instalasi->toArray());

        // Simpan data perangkat ke tabel dp_instalasi
        foreach ($request->dp_instalasi as $item) {
        Log::info('DP Instalasi Item:', $item);
        $instalasi->dpInstalasi()->create([
            'id_instalasi' => $instalasi->id_instalasi,
            'nama_perangkat' => $item['nama_perangkat'],
            'merk' => $item['merk'],
            'nomor_seri' => $item['nomor_seri'],
            'jumlah' => $item['jumlah'],
            'satuan' => $item['satuan'],
            'keterangan' => $item['keterangan'] ?? null,
        ]);
    }
        
    
        return redirect()->route('admin.instalasi')->with('success', 'Data berhasil disimpan!');
    }
    
    private function saveSignature($signatureData, $filename)
    {
        $folderPath = "signatures/";
        $image_parts = explode(";base64,", $signatureData);
        $image_type_aux = explode("image/", $image_parts[0]);
        $image_type = $image_type_aux[1];
        $image_base64 = base64_decode($image_parts[1]);
        $fileName = $folderPath . uniqid() . '.' . $image_type;
        
        Storage::disk('public/images')->put($fileName, $image_base64);
    
        return $fileName;
    }
    

public function hapus($id)
{
    try {
        // Cari data instalasi berdasarkan id
        $instalasi = Instalasi::findOrFail($id);

        // Hapus data detail perangkat instalasi terkait
        $instalasi->dpInstalasi()->delete();

        // Hapus data instalasi
        $instalasi->delete();

        // Redirect dengan pesan sukses
        return redirect()->route('admin.instalasi')->with('success', 'Data berhasil dihapus!');
    } catch (\Exception $e) {
        // Tangani kesalahan jika terjadi
        return redirect()->route('admin.instalasi')->with('error', 'Terjadi kesalahan saat menghapus data: ' . $e->getMessage());
    }
}

}

berikut model nya

<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class DPInstalasi extends Model
{
    use HasFactory;

    protected $table = 'dp_instalasi';
    protected $primaryKey = 'id_dp_instalasi';

    protected $fillable = [
        'id_instalasi', 'nama_perangkat', 'merk', 'nomor_seri', 'jumlah', 'satuan', 'keterangan'
    ];

    // Relasi ke Instalasi
    public function instalasi()
    {
        return $this->belongsTo(Instalasi::class, 'id_instalasi', 'id_instalasi');
    }
}

<?php namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory; use Illuminate\Database\Eloquent\Model;

class Instalasi extends Model { use HasFactory;

protected $table = 'instalasi';
protected $primaryKey = 'id_instalasi';

protected $fillable = [
    'no_iwo', 'customer_id', 'nama_cs', 'tanggal', 'alamat', 'kode_pos', 'kota',
    'jenis_layanan', 'bandwidth_intl_ix', 'bandwidth_lokal_iix', 'jumlah_rak',
    'no_rak', 'block_ip_wan_cs', 'block_ip_lan', 'gateway_ip', 'primary_dns',
    'secondary_dns', 'detail_pekerjaan', 'ping', 'trace_route', 'browsing',
    'download', 'speed', 'ttd_teknisi', 'nama_teknisi', 'ttd_cs', 'nama_cs_ttd'
];

// Relasi ke DPInstalasi (Detail Perangkat Instalasi)
public function dpInstalasi()
{
    return $this->hasMany(DPInstalasi::class, 'id_instalasi', 'id_instalasi');
}

}

berikut view nya

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Berita Acara Instalasi</title>
    <link rel="stylesheet" href="{{ asset('css/form-instalasi.css') }}">
</head>
<body>

<form action="{{ route('admin.instalasi.simpan') }}"  id="id_form_instalasi"  method="POST" enctype="multipart/form-data">
    @csrf
    <div class="header-container">
        <div class="top-section">
            <div class="left-section">
                <div class="logo-container">
                    <img class="logo" src="{{ asset('images/indonet.png') }}" alt="Indonet Logo">
                    <img class="logo" src="{{ asset('images/kan.png') }}" alt="Kan Logo">
                    <img class="logo" src="{{ asset('images/materai.png') }}" alt="Materai Logo">
                </div>
                <div class="company-info">
                    <p>PT. Indointernet Tbk</p>
                    <p>Rumah Indonet</p>
                    <p>Jl. Rempoa Raya no. 11, Tangerang 15412, Indonesia</p>
                    <p>T. +62 21 7388-2525 | T. Support +62 21 2755-5222</p>
                    <p>F. +62 21 7388-2626 | Website: <a href="http://www.indo.net.id">www.indo.net.id</a></p>
                    <p>E-mail: <a href="mailto:support@indonet.co.id">support@indonet.co.id</a></p>
                </div>
            </div>
            <div class="details">
                <div class="info-item">
                    <label for="no_iwo">No IWO:
                        <input type="text" id="no_iwo" name="no_iwo" value="{{ old('no_iwo') }}" required placeholder="Masukkan No IWO">
                    </label>
                </div>
                <div class="info-item">
                    <label for="id_cs">Customer ID:
                        <input type="text" id="id_cs" name="id_cs" value="{{ old('id_cs') }}" required placeholder="Masukkan Customer ID">
                    </label>
                </div>
            </div>
        </div>
        
        <div class="title-container">
            <strong>
                <div class="line"></div>
                <div class="title">BERITA ACARA INSTALASI DAN AKTIVASI</div>
                <em>STATEMENT OF ACCEPTANCE</em>
            </strong>
        </div>

        <div class="content-container">
            <p class="content-text">
                Dengan ini, kedua belah pihak, yakni PT. Indointernet Tbk sebagai Penyedia Layanan dan 
            </p>
            <p class="content-text">
            <label for="nama_cs"></label>
            <input type="text" id="nama_cs" name="nama_cs" class="no-border" value="{{ old('nama_cs') }}" required placeholder="Nama Customer">
                Sebagai Customer Pada: 
            </p>
        </div>

        <div class="content-container">
            <p class="content-text1">
                <label class="input-container" for="tanggal">
                    Hari, Tanggal:
                    <input type="date" id="tanggal" name="tanggal" value="{{ old('tanggal') }}">
                </label>
            </p>
            <p class="content-text1">
                mengetahui bahwa telah dilakukan instalasi perangkat pada lokasi Customer yang bertempatkan di:
            </p>
            
            <div class="address-container">
                <div class="address-column">
                    <div class="address-item">
                        <label for="alamat">Alamat:</label>
                        <textarea id="alamat" name="alamat" value="{{ old('alamat') }}"></textarea>
                    </div>
                </div>
                <div class="address-column">
                    <div class="address-item">
                        <label for="kode_pos">Kode Pos:</label>
                        <input type="text" id="kode_pos" name="kode_pos" value="{{ old('kode_pos') }}">
                    </div>
                    <div class="address-item">
                        <label for="kota">Kota/Kabupaten:</label>
                        <input type="text" id="kota" name="kota" value="{{ old('kota') }}">
                    </div>
                </div>
            </div>
            <p class="content-text">
                dengan rincian sebagai berikut:
            </p>

            <div class="service-table-container">
                <div class="service-table">
                    <div class="service-column">
                        <div class="service-row">
                            <label for="jenis_layanan">Jenis Layanan:</label>
                            <input type="text" id="jenis_layanan" name="jenis_layanan" value="{{ old('jenis_layanan') }}">
                        </div>
                        <div class="service-row">
                            <label for="bandwidth_intl">Bandwidth Intl. (XI):
                                <input type="text" id="bandwidth_intl_ix" name="bandwidth_intl_ix" value="{{ old('bandwidth_intl_ix') }}">
                            </label>
                        </div>
                        <div class="service-row">
                            <label for="bandwidth_local">Bandwidth Lokal (XI):
                                <input type="text" id="bandwidth_lokal_iix" name="bandwidth_lokal_iix" value="{{ old('bandwidth_lokal_iix') }}">
                            </label>
                        </div>
                        <div class="rack-row">
                            <label for="jumlah_rak">Jumlah Rak:</label>
                            <input type="text" id="jumlah_rak" name="jumlah_rak" value="{{ old('jumlah_rak') }}">
                            <label for="no_rak">No. Rak:</label>
                            <input type="text" id="no_rak" name="no_rak" value="{{ old('no_rak') }}">
                        </div>
                    </div>
                    <div class="vertical-line"></div>
                    <div class="service-column">
                        <div class="service-row">
                            <label for="block_ip_wan">Block IP WAN Customer:
                                <input type="text" id="block_ip_wan_cs" name="block_ip_wan_cs" value="{{ old('block_ip_wan_cs') }}">
                            </label>
                        </div>
                        <div class="service-row">
                            <label for="block_ip_lan">Block IP LAN Customer:
                                <input type="text" id="block_ip_lan_cs" name="block_ip_lan" value="{{ old('block_ip_lan_cs') }}">
                            </label>
                        </div>
                        <div class="service-row">
                            <label for="gateway_ip">Gateway IP:</label>
                            <div class="ip-blocks">
                                <input type="text" id="gateway_ip" name="gateway_ip" value="{{ old('gateway_ip') }}">
                            </div>
                        </div>
                        <div class="service-row">
                            <label for="primary_dns">Primary DNS:</label>
                            <div class="ip-blocks">
                                <input type="text" id="primary_dns" name="primary_dns" value="{{ old('primary_dns') }}">
                            </div>
                        </div>
                        <div class="service-row">
                            <label for="secondary_dns">Secondary DNS:</label>
                            <div class="ip-blocks">
                                <input type="text" id="secondary_dns" name="secondary_dns" value="{{ old('secondary_dns') }}">
                            </div>
                        </div>
                    </div>
                </div>

                <div class="job-details-container">
                    <div class="job-details">
                        <label for="detail_pekerjaan">Detail pekerjaan:</label>

                        <label for="pemasangan">
                            <input type="radio" id="pemasangan" name="detail_pekerjaan" value="pemasangan">
                            Pemasangan
                        </label>

                        <label for="peningkatan">
                            <input type="radio" id="peningkatan" name="detail_pekerjaan" value="peningkatan">
                            Peningkatan
                        </label>

                        <label for="penurunan">
                            <input type="radio" id="penurunan" name="detail_pekerjaan" value="penurunan">
                            Penurunan
                        </label>

                        <label for="pemindahan">
                            <input type="radio" id="pemindahan" name="detail_pekerjaan" value="pemindahan">
                            Pemindahan
                        </label>

                        <label for="penggantian">
                            <input type="radio" id="penggantian" name="detail_pekerjaan" value="penggantian">
                            Penggantian
                        </label>
                    </div>
                </div>

            </div>

            <p class="agreement-text">
                HASIL UJI AKTIVASI
            </p>
            <div class="activation-result-container">
                <div class="job-details">
                    <label>
                        <input type="checkbox" id="ping" name="ping" value="ping" {{ old('ping') ? 'checked' : '' }}> 
                        Ping
                    </label>
                    <label>
                        <input type="checkbox" id="trace_route" name="trace_route" value="trace_route" {{ old('trace_route') ? 'checked' : '' }}> 
                        Trace Route
                    </label>
                    <label>
                        <input type="checkbox" id="browsing" name="browsing" value="browsing" {{ old('browsing') ? 'checked' : '' }}> 
                        Browsing
                    </label>
                    <label>
                        <input type="checkbox" id="download" name="download" value="download" {{ old('download') ? 'checked' : '' }}> 
                        Download
                    </label>
                    
                    <div class="speed-item">
                        <label for="speed">Speed:</label>
                        <input type="text" id="speed" name="speed" value="{{ old('speed') }}"> 
                        <span>Mbps</span>
                    </div>
                </div>
            </div>

            <h3>Data Perangkat Milik Indonet :</h3>
            <table class="custom-table" id="dpInstalasiTable">
                <thead>
                    <tr>
                        <th class="custom-th">Nomor</th>
                        <th class="custom-th">Nama Perangkat</th>
                        <th class="custom-th">Merek</th>
                        <th class="custom-th">Nomor Seri</th>
                        <th class="custom-th">Jumlah</th>
                        <th class="custom-th">Satuan</th>
                        <th class="custom-th">Keterangan</th>
                        <th class="custom-th">Aksi</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td class="custom-td">1</td>
                        <td class="custom-td">
                            <label for="nama_perangkat_0" class="sr-only">Nama Perangkat</label>
                            <input type="text" id="nama_perangkat_0" name="dp_instalasi[0][nama_perangkat]" class="custom-input-text" value="{{ old('dp_instalasi[0][nama_perangkat]') }}" required />
                        </td>
                        <td class="custom-td">
                            <label for="merk_0" class="sr-only">Merek</label>
                            <input type="text" id="merk_0" name="dp_instalasi[0][merk]" class="custom-input-text" value="{{ old('dp_instalasi[0][merk]') }}" required/>
                        </td>
                        <td class="custom-td">
                            <label for="nomor_seri_0" class="sr-only">Nomor Seri</label>
                            <input type="text" id="nomor_seri_0" name="dp_instalasi[0][nomor_seri]" class="custom-input-text" value="{{ old('dp_instalasi[0][nomor_seri]') }}" required/>
                        </td>
                        <td class="custom-td">
                            <label for="jumlah_0" class="sr-only">Jumlah</label>
                            <input type="number" id="jumlah_0" name="dp_instalasi[0][jumlah]" class="custom-input-number" value="{{ old('dp_instalasi[0][jumlah]') }}" />
                        </td>
                        <td class="custom-td">
                            <label for="satuan_0" class="sr-only">Satuan</label>
                            <input type="text" id="satuan_0" name="dp_instalasi[0][satuan]" class="custom-input-text" value="{{ old('dp_instalasi[0][satuan]') }}" />
                        </td>
                        <td class="custom-td">
                            <label for="keterangan_0" class="sr-only">Keterangan</label>
                            <input type="text" id="keterangan_0" name="dp_instalasi[0][keterangan]" class="custom-input-text" value="{{ old('dp_instalasi[0][keterangan]') }}" />
                        </td>
                        <td>
                            <button type="button" onclick="removeRow(this)">Hapus</button>
                        </td>
                    </tr>
                </tbody>
            </table>
            <button type="button" onclick="addRow()">Tambah Baris</button>

            <!-- Signature Section -->
            <div class="signature-container" style="display: flex; justify-content: space-between;">
                <!-- Left Signature -->
                <div>
                    <div class="signature-title">PT. Indonet,</div>
                    <div class="signature-box" id="left-signature-box">
                        <input type="hidden" id="left_signature" name="ttd_teknisi">
                        <canvas id="left-signature-canvas" style="width: 100%; height: 100%;"></canvas>
                        <button type="button" class="clear-button" onclick="clearSignature('left-signature-canvas')">Clear</button>
                    </div>
                    <div class="signature-label">Teknisi</div>
                    <input type="text" class="custom-input-text" style="width: 100%;" placeholder="Nama Teknisi" required>
                </div>

                <!-- Right Signature -->
                <div>
                    <div class="signature-title">Customer,</div>
                    <div class="signature-box" id="right-signature-box">
                        <input type="hidden" id="right_signature" name="ttd_cs">
                        <canvas id="right-signature-canvas" style="width: 100%; height: 100%;"></canvas>
                        <button type="button" class="clear-button" onclick="clearSignature('right-signature-canvas')">Clear</button>
                    </div>
                    <div class="signature-label">Customer</div>
                    <input type="text" class="custom-input-text" style="width: 100%;" placeholder="Nama Customer" required>
                </div>
            </div>

            <button type="submit" onclick="saveSignatures()">Simpan Data</button>
        </div>
    </div>
</form>

<script src="{{ asset('js/form-instalasi.js') }}"></script>

</body>
</html>

dan berikut route nya

//Instalasi (admin)                           
Route::prefix('admin')->group(function () {
    Route::get('/instalasi', [InstalasiController::class, 'instalasi'])->name('admin.instalasi');
    Route::get('/instalasi/tambah', [InstalasiController::class, 'tambah'])->name('admin.form_instalasi');
    Route::post('/instalasi/simpan', [InstalasiController::class, 'simpan'])->name('admin.instalasi.simpan');
});