Question 283889 in Laravel Question posted in
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Laravel HAS MANY/BELONGS TO relationship

I want to join two tables with laravel relationship, but I’ve gotten stuck.

I have 2 MySSL tables

table strans
    + id
    + trans_code
    + trans_description

table step
    + step_id
    + step_trans_code
    + step_proc_sequence

My models look like this:

class Strans extends Model
{
    protected $table = 'hc_strans';
    protected $fillable = [
        'trans_code', 'trans_description', 'trans_sk_code'
    ];
    public function step()
    {
        return $this->hasMany(Sstep::class, 'step_trans_code', 'trans_code');
    }
}
 
 
 class Sstep extends Model
 {
    protected $table = 'hc_sstep';
    protected $fillable = [
        'step_trans_code', 'step_proc_sequence'
    ];
    public function transCode()
    {
       return $this->belongsTo(Strans::class, 'trans_code', 'step_trans_code');
    }
 }

At the step controller, I called the relationship:

$step = Sstep::with('transCode')->get();

The table data have all the relationship values. But when I try the relationship, transCode variable returns a null value.
I tried with manual query, it’s no problem.

"data": [
    {
        "step_id": 8,
        "step_trans_code": "MUT",
        "step_proc_sequence": 80,
        "trans_code": null
    }
]

Am I doing it wrong in the relationship?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0 
    class Sstep extends Model
{
   protected $table = 'hc_sstep';
   public function transCode()
   {
      return $this->belongsTo(Strans::class, 'step_trans_code', 'trans_code');
   }
}

  2. 0

    Laravel has a naming convention, for example in belongs to the relationship it will consider the foreign key as stran_id, so define the foreign key explicitly.

    public function transCode()
{
    return $this->belongsTo(Strans::class, 'step_trans_code', 'trans_code');
}

$step = Sstep::with('transCode')->get();
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