HasOne support? about laravel-has-many-merged

[korridor]

Thanks for the idea! Sounds like something that could be done.

If you have time, could you explain your use case in a bit more detail?

[Hirishiolo]

I have one model "Profile" with two foreign keys: "admin_id" and "manager_id" that point to the same table "Person". It also has one connected User.

// Profile Model
	/**
	 * @return BelongsTo
	 */
	public function user(): BelongsTo {
		return $this->belongsTo(User::class, 'user_id');
	}
	/**
	 * @return BelongsTo
	 */
	public function admin(): BelongsTo {
		return $this->belongsTo(Person::class, 'admin_id');
	}
	/**
	 * @return BelongsTo
	 */
	public function manager(): BelongsTo {
		return $this->belongsTo(Person::class, 'manager_id');
	}

I have two relations in Person model:

// Person model
	/**
	 * @return HasOne
	 */
	public function adminProfile(): HasOne {
		return $this->hasOne(Profilo::class,'admin_id');
	}
	/**
	 * @return HasOne
	 */
	public function managerProfile(): HasOne {
		return $this->hasOne(Profilo::class,'manager_id');
	}

Now i want to access the User from the Person (one Person can have only one adminProfile or one managerProfile, not both of them). Actually I use this accessor:

// Person model
	/**
	 * Get connected User
	 * @return mixed
	 */
	public function getUserAttribute(): mixed {
		$profile = ($this->adminProfile ?? $this->managerProfile);	// first not null
		return $profile->user;
	}

But with the attribute I cannot use eager loading, and I would like to have a relation like your "hasManyMerged":

/**
     * @return HasOneMerged
     */
    public function profile(): HasOneMerged
    {
        return $this->hasOneMerged(Profile::class, ['admin_id', 'manager_id'])
            ->oldestOfMany();
    }

"oldestOfMany()" is used to get only one record.

Another simpler example is here

[korridor]

@Hirishiolo Please check out if !13 resolves your problem. It is currently not perfect and I'll add more tests, but I think it is stable enough to test the use case.

[Hirishiolo]

thank you and very nice work! But unfortunately I have php 8.0 in my project, so I cannot use it. I plan to upgrade php in the next future, so I will try your branch!
Thanks!