Form binding in laravel for one to many relationship

Question

Company Model

class Company extends Model {
    public function position() {
         return $this->hasMany('App\Position);
    }
}

Position Model

class Position extends Model{
    public function company() {
         return $this->belongsTo('App\Company);
    }
}

companies table: id_company , company_name

positions table: id_position , position , company_id (foreign key)

What I'm trying to do is to create a dropdown list of every company name so i can reference the id of that company so i can store it as the foreign key (company_id).

Form for storing to positions table

{!! Form::open(['action' => 'PostionController@store', 'method' => 'POST', 'enctype' => 'multipart/form-data']) !!}
<div class="form-group">
    {{Form::label('position', 'Position')}}
    {{Form::text('position', '', ['class' => 'form-control', 'placeholder' => 'Position'])}}
</div>
//Reference to the id
<div class="form-group">
    {{Form::select(!!!Array generated from the Company table!!!")}};
</div>
{{Form::submit('Submit', ['class'=>'btn btn-primary'])}}
{{Form::reset('Reset', ['class'=>'btn btn-danger'])}}
{!! Form::close() !!}

I'm new to Laravel so any reference to read it would be a great help Thank you!

Answer 1

You can specify foreign key name in hasMany() and belongsTo() in second parametr.

Company Model

class Company extends Model {
    public function position() {
         return $this->hasMany(App\Position::class, 'company_id');
    }
}

Position Model

class Position extends Model{
    public function company() {
         return $this->belongsTo(App\Company:class, 'company_id');
    }
}

To get company positions:

{{ Form::select('name',\App\Company::find($id)->position()->get()->toArray())}}

Or you can get company by position:

\App\Position::find($id)->company()->get()->toArray()

Be carefull. Don't use get() with only find() method. This will return you all rows in your table. You can use get() after using relation function.

Answer 2

用这个：

{!! Form::select('company_id', \App\Company::pluck('company_name', 'id_company')) !!}