【Laravel】old関数の使い方（メモ）

<input id="name" type="text" name="name" value="{{ old('name') }}">

<textarea id="content" name="content">{{ old('content') }}</textarea>

<select id="age" name="age">
    <option value="">選択してください</option>
    @foreach ($get_ages as $age)
        <option value="{{ $age->id }}" @if(old('age') == $age->id) selected @endif>{{ $age->age }}</option>
    @endforeach
</select>

<input type="hidden" name="age" value="{{ $inputs['age_id'] }}">

$age = new Age;
$get_ages = $age->getAges();

foreach ($get_ages as $age) {
    if ($age->id == $inputs['age']) {
        $inputs['age_id'] = $age->id;
        $inputs['age'] = $age->age;
    }
}

public function getAges()
{
    $get_ages = Age::all();

    return $get_ages;
}

<input type="checkbox" id="{{ $sex->inputName }}"
    name="sex[]" value="{{ $sex->id }}" {{ is_array(old('sex')) && in_array($sex->id, old('sex')) ? 'checked=checked' : '' }}>

<input type="hidden" name="sex[]" value="{{ $sex_id }}">

if($request->has('sex')) {
    foreach ($get_sexes as $sex) {
        if (in_array($sex->id, (array)$inputs['sex'])) {
            $inputs['sex_id'][] = $sex->id;
            $inputs['sexes'][] = $sex->sex;
        }
    }
}

$data = $request->session()->all();

<input id="name" type="text" name="name" value="{{ old('name', $data['name']) }}">

<textarea id="content" name="content">{{ old('content', $data['content']) }}</textarea>

<select id="age" name="age">
    @foreach ($get_ages as $age)
        <option value="{{ $age->id }}" @if ($age->id == old('age_id', $data['age_id'])) selected @endif>{{ $age->age }}</option>
    @endforeach
</select>

@foreach ($get_sexes as $sex)
    <label for="{{ $sex->inputName }}">
        <input type="checkbox" id="{{ $sex->inputName }}" name="sex[]" value="{{ $sex->id }}" @if(in_array($sex->id, $data['sex_id'])) checked @endif>
        <span class="text-sm">
            {{ $sex->sex }}
        </span>
    </label>
@endforeach

$sex = new Sex;
$get_sexes = $sex->getSexes();