通过Ruby On Rails中的jquery的onclick函数传递对象的id

Question

I have one Controller VendorController . And view file is index.html.erb

I want to pass the id of vendor through onclick function. Here is my code

Codes under vendors_controller.rb

def index
  @vendor = Vendor.all
end

Codes of index.html.erb

<script language="javascript" type="text/javascript">
function func1(id) {
    alert(_id);
}

function func2(id) {
    alert(id);
}
</script>


<% @vendors.each do |vendor| %>
  <tr>
    <td><%=link_to vendor.name , '#',  onclick: "func1(1)", remote: true %></td>
    <td><%= link_to vendor.id, '#', :onclick => 'func2(vendor.id)' %></td>
  </tr>
<% end %>

For func1() i am getting the alert. But for func2 I am not getting any response. Please help..thank you in advance.

Answer 1

@max-williams answer should solve your problem. But I'd also recommend that you explore the option of embedding the record ID in the <tr> tag as a data attribute instead of writing out the onclick function. Then in your JS, you can dynamically select the ID in your event listeners.

Consider:

<tr data-id="<%= vendor.id %>">
  <td><%= link_to vendor.id, '#', :class=>"vendor-link" %></td>
</tr>

Then just listen for clicks:

$( ".vendor-link" ).click(function() {
  id = $(this).closest("tr").data("id");
  alert(id);
});

This method will separate out your JS from your HTML template and make it a little more manageable. Plus, you can also attach multiple click functions, giving you a little more flexibility.

Answer 2

I think you just need to escape the contents of your onclick to have the actual id in it, instead of just a string saying "vendor.id" - remember it's just a string, so it needs to have the right data in it when it gets loaded in the browser.

Try

<td><%= link_to vendor.id, '#', :onclick => "func2(#{vendor.id})" %></td>

Note double quotes, to allow string interpolation.