validation-ex.php

 <?php

// All Validation Blocks are For One Method

 if ($request->quick) {
    $request->validate([
        'quick'     => 'required',
        'pickup_id' => 'required',
    ]);
    ...
}

...

if ($request->mode == 'bulk') {
    $request->validate([
        'pickup_id' => [
            'required',
            Rule::exists('pickups', 'id')->where(function ($query) {
                return $query->where('user_id', $this->user->id);
            }),
        ],
        'upload'    => 'mimes:xls,xlsx|max:1024',
    ]);
}

...

if ($request->final == 'yes') {
    $request->validate([
        'name.*'          => 'required',
        'mobile.*'        => 'required|mobile',
        'address.*'       => 'required',
        'cod.*'           => 'nullable|cod|no_fraction',
        'sale_price.*'    => 'required',
        'pickup_id.*'     => 'required',
        'package_id.*'    => 'required',
        'delivery_area.*' => 'required',
    ]);
}

...

/**
 * Single Entry
 * @var [type]
 */
$request->validate([
    'pickup_id'     => [
        'required',
        Rule::exists('pickups', 'id')->where(function ($query) {
            return $query->where('user_id', $this->user->id);
        }),
    ],
    'name'          => 'required',
    'mobile'        => 'required|mobile',
    'address'       => 'required',
    'package'       => [
        'required',
        Rule::exists('pricings', 'id')->where(function ($query) {
            $uid = ($this->user->special_price > 0) ? $this->user->id : 0;
            return $query->where('user_id', $uid);
        }),
    ],
    'delivery_area' => [
        'required',
        Rule::exists('locations', 'id')->where(function ($query) {
            return $query->where('status', 1);
        }),
    ],
    'sale_price'    => 'required',
    'cod'           => 'nullable|cod|no_fraction',
]);