Update Cart Item

Update the quantity of a specific item in the authenticated user’s cart

PUT /cart/item/:id

PUT /cart/item/10

{
  "id": 10,
  "cartId": 1,
  "productId": 42,
  "quantity": 5
}

Authentication

This endpoint requires authentication. Include a valid JWT token in the Authorization header.

Authorization: Bearer <token>

Path Parameters

id · integer · required

The ID of the cart item to update (not the product ID)

Request Body

quantity · integer · required

The new quantity for the cart item. Must be at least 1.

PUT /cart/item/10

Response

Returns the updated cart item.

id · integer · required

Unique identifier for the cart item

cartId · integer · required

ID of the cart this item belongs to

productId · integer · required

ID of the product

quantity · integer · required

Updated quantity of the product in the cart

{
  "id": 10,
  "cartId": 1,
  "productId": 42,
  "quantity": 5
}

Behavior

• This endpoint sets the quantity to the specified value (not incremental)
• The cart item must belong to the authenticated user’s cart
• Use the DELETE endpoint if you want to remove the item entirely

Error Responses

Cart Item Not Found (404)

{
  "message": "Item no encontrado en tu carrito"
}

This error occurs when:

• The cart item ID doesn’t exist
• The cart item belongs to another user’s cart

Validation Error (400)

{
  "errors": [
    {
      "field": "quantity",
      "message": "La cantidad debe ser al menos 1"
    }
  ]
}

Unauthorized (401)

{
  "message": "Usuario no autenticado"
}