CODEWITHSUNDEEP
ruby-on-railsvalidationcoffeescript
Sampat Badhe
Sampat Badhe

Reputation: 9085

Client side validation for price(float) field

I am using Rails 3.2.13 and ruby 1.9.3p194

I have added client side validation to allow user to enter only numbers[0-9] and decimal[.] in price field. My code is as follows:

price.js.coffee

  $("input").bind "keypress", (event) ->
    regex = new RegExp("^[1-9]\d*(\.\d+)?$")
    key = String.fromCharCode((if not event.charCode then event.which else event.charCode))
    unless regex.test(key)
      false

form.html.haml

= simple_form_for :purchase, url: purchase_path, method: :post do |f|
= f.input :value, as: :integer, label: 'Amount',
  input_html: { min: "0.01", value: number_with_precision(precision: 2)}

Currently I am able to enter numbers in the textbox but I am unable to add a decimal point. I dont know where I am making a mistake. Any help is much appreciated.Thnx:)

Upvotes: 0

Views: 381

Answers (1)

rcandrzej
rcandrzej

Reputation: 21

I think the problem lies with your regex.

Try:

/^[0-9]\d*\.\d{2}$/

This will only allow prices ending in 2 digits after a decimal place e.g:

12.99, 13.00, 1.50, 0.30

but not

12.1, .05, 15.999, 13

Hope that helps!

Upvotes: 1

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