'datetime', 'updated_at' => 'datetime', 'deleted_at' => 'datetime', ]; public function city(): BelongsTo { return $this->belongsTo(City::class, 'city_id'); } public function state(): BelongsTo { return $this->belongsTo(State::class, 'state_id'); } public function partners(): HasMany { return $this->hasMany(UnitPartner::class, 'unit_id'); } public function franchisees(): BelongsToMany { return $this->belongsToMany(Franchisee::class, 'franchisee_units'); } }