Sorry if this is really obvious, I'm slightly new but could not find this answer anywhere.
I am trying to create a button that increases the quantity of an item by one in my index view.
I have a simple table items with the columns: |name|brand|type|Quantity|
My Controller:
def index
@items = Item.all
end
def incr_quantity
Item.find(params[:id]).increment!(:quantity, by = 1)
end
In my view I have each item with 3 options next to it:
<% @items.each do |item| %>
<tr>
<td><%= image_tag(item.profile_url(:thumb)) %></td>
<td><%= item.name %></td>
<td><%= item.brand %></td>
<td><%= item.type %></td>
<td><%= item.quantity %></td>
<td><%= link_to 'Edit', edit_item_path(item) %></td>
<td><%= link_to 'Delete', item_path(item), method: :delete, data: {confirm: 'Are you sure?'} %></td>
<td><%= link_to 'Use 1 Item',item_incr_quantity_path(item), method: :post %></td>
</tr>
<% end %>
</table>
As you may have guessed I am getting the error "Couldn't find Item without an ID" whenever I click the hyperlink "Use 1 Item", but I cannot figure out how to pass the specific item ID for the item in the index table that they click on.
As was pointed out: I should have included my routes file to help answer this a bit better:
resources :items do
post "incr_quantity"
end
and the Request looked like this:
Parameters:
{"_method"=>"post",
"authenticity_token"=>"XXXXXXXXXX",
"item_id"=>"3"}
Looking at the way you have defined the link to direct to item_incr_quantity_path (item)
, I am sure that you have defined the routes for incr_quantity
something like:
resources :items do
post "incr_quantity"
end
That would create a route for incr_quantity
action as below:
item_incr_quantity POST /items/:item_id/incr_quantity(.:format) items#incr_quantity
which you can verify by running rake routes
command.
In that case, you should be using params[:item_id]
instead of params[:id]
.
def incr_quantity
Item.find(params[:item_id]).increment!(:quantity, by = 1)
end
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.