Create the projects part.

app/Models/Project.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Models;
+
+use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Project extends Model
+{
+    use SoftDeletes;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'customer_id',
+        'name',
+        'project_number',
+        'description',
+        'start_date',
+        'end_date',
+    ];
+
+    /**
+     * The attributes that are appended with attribute getters.
+     *
+     * @var string[]
+     */
+    protected $appends = [
+        'start',
+        'end',
+    ];
+
+    /**
+     * Get the end_date attribute in local format.
+     */
+    public function getStartAttribute(): string
+    {
+        return (is_null($this->start_date)) ? '' : Carbon::createFromFormat('Y-m-d', $this->start_date)->format('d.m.Y');
+    }
+
+    /**
+     * Get the end_date attribute in local format.
+     */
+    public function getEndAttribute(): string
+    {
+        return (is_null($this->end_date)) ? '' : Carbon::createFromFormat('Y-m-d', $this->end_date)->format('d.m.Y');
+    }
+
+    /**
+     * Get the customer this project belongs to.
+     */
+    public function customer(): BelongsTo
+    {
+        return $this->belongsTo(Customer::class);
+    }
+}