Update or Remove Item from Cart? - ruby-on-rails

Question

I manage the orders made by the customers. My Order table is connected to the model Cart. The model Cart is connected to the Product model Many to Many which gave the association table line_items which includes id_cart, id_product, and quantity. But for the Cart, I want to add the option to update and delete an element of the Cart. I met a blocking - more precisely in the view Order where at the end I show the list of the elements in the Cart as follows
<h3> Order Details </ h3>
<table class = "table-bordered table">
<td> Designation </ td> <td> Quantity </ td> <td> Price </ td> </ tr>
<% order.cart.line_items.each do | item | %>
<tr align = "center">
<td> <% = f.text_field: product_id,: value => item.product.title,: readonly => true, class: 'form-control'%> </ td>
<td> <% = f.text_field: qte,: value => item.qte, class: 'form-control'%> </ td>
<td> <% = number_to_currency (product.inc.unit, unit: "F", separator: ",", format: "% n% u")%> </ td>
</ Tr>
<% end%>
</ Table>
There I will have the fields textfield with default value what the customer had ordered allowing the modification. But the problem is that the attibutes product_id and qte do not belong to the model order but earlier to the model line_items, so I will not have permission to insert:
unpermitted parameters: :product_id, :qte
I even try the method accepts_nested_attributes_for and I will have permission. But the transaction will not commit but rollback.
And thank you for helping me for this bug that prevents me from advancing for days
the submitted params look like this
<%= form_with(model: order,:remote => true) do |f| %>
<div class="content">
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<div class="card">
<div class="header">
<h4 class="title"> Edite Order</h4>
</div>
<div class="content">
<div class="row">
<!-- Order Reference-->
<div class="col-md-5">
<div class="form-group">
<label><%= f.label :ref,"Reference Order "%></label>
<%= f.text_field :ref, :value => "ABC-123-NY#{#order.id}",:readonly => true,class: ' form-control' %>
</div>
</div>
<!-- Supplier List -->
<div class="col-md-5">
<div class="form-group">
<label><%= f.label :supplier_id,"Fournisseur"%></label>
<%=f.collection_select :supplier_id,Fournisseur.all,
:id,:namefrs,{required: true},id:"listfrs",class: 'form-control'%>
</div>
</div>
<!-- boutton update -->
<div class="col-md-2">
<div class="form-group">
<%= f.submit 'Modifier',:name => "valid",:class => 'btn btn-info btn-fill pull right'%>
</div>
</div>
</div>
</div>
</div>
<div class="card">
<div class="content">
<div class="row">
<!-- Date Order -->
<div class="col-md-5">
<div class="form-group">
<label><%= f.label :date_order,"Date"%></label>
<%= f.date_select :date_order, label: false, placeholder: "Sélectionnez la date et l'heure",class: 'form-control'%>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="col" id="cart">
<h3>Order</h3>
<table class="table table-bordered">
<tr align="center" class="h4">
<td>Designation</td>
<td>Quantity</td>
<td>Price</td>
</tr>
<% order.cart.line_items.each do |item| %>
<tr align="center">
<td><%= f.text_field :product_id,:value => item.product.title,:readonly => true,class: 'form-control'%></td>
<td><%= f.text_field :qty, :value=>item.qty ,class: 'form-control' %></td>
<td><%= number_to_currency(item.product.price, unit: "F",separator:",",format:"%n %u")%></td>
</tr>
<% end %>
</table>
</div>
<% end %>
i have this in my controller Order
def update
respond_to do |format|
#order.cart.line_items.each do |item|
item.qty = params[:qty]
end
format.html { redirect_to #order, notice: 'Order was successfully updated.' }
end
end