laravel-5.8:The POST method is not supported for this route. Supported methods: GET, HEAD - laravel

Question

hi m trying to add products in cart but it says: The POST method is not supported for this route. Supported methods: GET, HEAD.. (View: \resources\views\product\detail.blade.php), I wants that by clicking the addtocart it redirect me to that age with products,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,...…………………………………..,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
route:
Route::get('cart', 'Admin\ProductController#cart')->name('product.cart');
Route::get('/addToCart/{product}', 'Admin\ProductController#addToCart')->name('addToCart');
controller:
public function cart()
{
if (!Session::has('cart')) {
return view('products.cart');
}
$cart = Session::has('cart');
return view('product.cart', compact('cart'));
}
public function addToCart(Product $product, Request $request)
{
if(empty(Auth::user()->email)){
$data['email'] = '';
}else{
$data['email'] = Auth::user()->email;
}
$oldCart = Session::has('cart') ? Session::get('cart') : null;
$qty = $request->qty ? $request->qty : 1;
$cart = new Cart($oldCart);
$cart->addProduct($product);
Session::put('cart', $cart);
return redirect()->back()->with('flash_message_success', 'Product $product->title has been successfully added to Cart');
}
view:
<form method="POST" action="{{ route('addToCart') }}" enctype="multipart/form-data">
<div class="btn-addcart-product-detail size9 trans-0-4 m-t-10 m-b-10">
#if($product->product_status == 1)
<!-- Button -->
<button class="flex-c-m sizefull bg1 bo-rad-23 hov1 s-text1 trans-0-4">
Add to Cart
</button>
#else Out Of Stock #endif
</div>
</form>
model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Cart
{
private $contents;
private $totalQty;
private $contentsPrice;
public function __construct($oldCart){
if ($oldCart) {
$this->contents = $oldCart->contents;
$this->totalQty = $oldCart->totalQty;
$this->totalPrice = $oldCart->totalPrice;
}
}
public function addProduct($product, $qty){
$products = ['qty' => 0, 'price' => $product->price, 'product' => $product];
if ($this->contents) {
if (array_key_exists($product->slug, $this->contents)) {
$product = $this->contents[$product->slug];
}
}
$products['qty'] +=$qty;
$products['price'] +=$product->price * $product['qty'];
$this->contents[$product->slug] = $product;
$this->totalQty+=$qty;
$this->totalPrice += $product->price;
}
public function getContents()
{
return $this->contents;
}
public function getTotalQty()
{
return $this->totalQty;
}
public function getTotalPrice()
{
return $this->totalPrice;
}
}

Answer 1

First of all your form method in the view is POST but you don't have a post route.
Second, the route that you have defined expect a parameter(product) you can change the form action as below BUT I think you want to send the user to another page so you can use a link instead of form.
Here's the form action:
action="{{ route('addToCart', $product->id) }}"
And if you want to use link, you can do something like this:
.....

Answer 2

Your method should be POST. In the form, you're calling it Post method but in route.php file, you defined as get to change it as Route::post
Route::post('/addToCart/{product}', 'Admin\ProductController#addToCart')->name('addToCart');
In addition, your route.php file expecting {product} so you need to pass it in form route so your action be like {{ route('addToCart',$product->id) }}
<form method="POST" action="{{ route('addToCart',$product->id) }}" enctype="multipart/form-data">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
</form>