[英]How to pass Ruby on Rails 'form_for' elements to a Javascript function?
I want to create a function that adds the value of a text field to another, the problem here is that I'm using forms from Ruby on Rails and I don't know if it is possible to get the ID from the field I want to process. 我想创建一个将文本字段的值添加到另一个字段的函数,这里的问题是我使用的是来自Ruby on Rails的表单,我不知道是否有可能从我想要的字段中获取ID处理。 Here is my code: 这是我的代码:
This is a nested form. 这是一个嵌套形式。
<%= f.fields_for :invoices do |invoice_form| %>
<br>
<%= invoice_form.label :in_number %>
<br>
<%= invoice_form.text_field :in_number %>
<br>
<%= invoice_form.label :in_amount %>
<br>
<%= invoice_form.text_field(:in_amount,:onkeypress => "myFunction(document.getElementById('in_amount'))") %>
<br>
<%= invoice_form.label :in_date %>
<br>
<%= invoice_form.date_select :in_date %>
<br>
<%= invoice_form.label :in_meshHr %>
<br>
<%= invoice_form.text_field :in_meshHr %>
<% end %>
And here is my javascript function: 这是我的JavaScript函数:
function myFunction(text) {
var amount = parseFloat($('#purchase_order_po_amount').val());
var amount1 = document.getElementById(text).value;
alert(amount1+amount);
}
You can pass this
which will represent the field you want. 您可以通过this
字段,该字段将代表您想要的字段。
<%= invoice_form.text_field(:in_amount,:onkeypress => "myFunction(this)") %>
and then in your function you can do: 然后在您的函数中,您可以执行以下操作:
function myFunction(element) {
var amount = parseFloat($('#purchase_order_po_amount').val());
var amount1 = $(element).val();
alert(amount1+amount);
}
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