如何从 Eloquent 模型中获取所有数据及其关系？

Question

My question is how to get the data from an eloquent model with its relation?

Imagine 3 tables:

users :

| id | name | email           |
|----|------|-----------------|
| 1  | name | email@email.com |

companies :

| id | name | user_id | address_id |
|----|------|---------|------------|
| 1  | name | 1       | 1          |

addresses :

| id | zip    | state |
|----|--------|-------|
| 1  | 101010 | LA    |

And the relations:

Company.php

public function user()
{
    return $this->hasOne(User::class);
}

public function address()
{
    return $this->hasOne(Address::class);
}

User.php

public function company()
{
    return $this->belongsTo(Company::class);
}

Address.php

public function company()
{
    return $this->belongsTo(Company::class);
}

In this case how I can get let's say all the companies with their related users and addresses?

on Company::whereHas('users')->get(); getting:

Illuminate/Database/QueryException with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.company_id' in 'where clause' (SQL: select * from `users` where `users`.`company_id` in (1, 2, 3, 4, 5))'

Any thoughts?

Thank you

Answer 1

You need to swap the hasOne with BelongsTo and vice versa;

Company.php

public function users()
{
    return $this->belongsTo(User::class, 'user_id');
}

public function address()
{
    return $this->belongsTo(Address::class);
}

User.php

public function company()
{
    return $this->hasOne(Company::class);
}

Address

public function company()
{
    return $this->hasOne(Company::class);
}

and then in Controller

Company::whereHas('users')
    ->whereHas('address')
    ->with('users')->with('address')
    ->get();

Answer 2

The issue was that in the company model, the user and the address methods were referencing with the hasOne() method to other models. It was looking for a secondary key to be in the users' table, not in the companies one.

Simply swapping up the hasOne() with belongsTo fixed out my issue.

So now my Company.php model looks like:

public function user()
{
    return $this->belongsTo(User::class);
}

public function address()
{
    return $this->belongsTo(Address::class);
}

User.php

public function company()
{
    return $this->hasOne(Company::class);
}

Address.php

public function company()
{
    return $this->hasOne(Company::class);
}

Now we can get all the list of companies with their user and address by Company::with('user')->with('address')->get();