在表格中为 Laravel 7 创建默认值

Question

I have a model:

namespace Modules\Acquisition\Entities;

use Illuminate\Database\Eloquent\Model;

class AcqMBudgets extends Model
{
    public $timestamps = false;
    
    protected $primaryKey = 'budget_id';
    
    protected $fillable = ['budget_code', 'budget_name', 'balance'];
    
    protected $attributes = [
        'balance' => 0,
    ];
}

On my controller:

<?php

namespace Modules\Acquisition\Http\Controllers;

use Modules\Acquisition\Entities\AcqMBudgets;

use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Routing\Controller;

class BudgetController extends Controller
{
    //...//
    
    public function add()
    {
        return view('acquisition::budget.add');
    }

    //...//
}

and lastly on my view:

{{ Form::open(['url' => '/acquisition/master/budget/create', 'method' => 'POST']) }}

<div class="row">
    {{ Form::label('budget_code', 'Code') }}
    {{ Form::text('budget_code', '') }}
</div>

<div class="row">
    {{ Form::label('budget_name', 'Name') }}
    {{ Form::text('budget_name', '') }}
</div>

<div class="row">
    {{ Form::label('balance', 'Balance') }}
    {{ Form::text('balance', '') }}
</div>

{{ Form::close() }}

What I wanted is setting up the default value for balance to 0 when I displayed the form. I used this method based on Laravel 5.x documentation, but the result is always a blank text input? By the way, the table structure in database is as following:

table name: acq_m_budgets
----------
budget_id serial NOT NULL, -- The primary key
budget_code character varying(10) NOT NULL,
budget_name character varying(100) NOT NULL,
balance numeric(16) DEFAULT 0,

Answer 1

You are looking for setting the default value of the text input. You can do this like:

    {{ Form::text('balance', '0') }}

Or, if you have access to the $balance variable:

    {{ Form::text('balance', $balance) }}