*/ use ErbtZuordnung, HasFactory; /** * @return array */ protected function casts(): array { return [ 'land' => Land::class, ]; } protected function zuordnungsEltern(): ?Model { return $this->projekt()->first(); } /** @return BelongsTo */ public function projekt(): BelongsTo { return $this->belongsTo(Projekt::class); } /** @return HasMany */ public function vertraege(): HasMany { return $this->hasMany(Vertrag::class); } }