CODEWITHSUNDEEP
ruby-on-railsruby
Danielius Visockas
Danielius Visockas

Reputation: 116

Limiting words count in model rails

I have Meets model meet.rb with one attribute called tags. User inputs them with single form_for. Question would be: how can I limit in my model that if user inputs more that 3 words, he would get an error message. Or if you can show me solution with javascript it would be nice too. Thank you!

Upvotes: 0

Views: 103

Answers (3)

Roman Kiselenko
Roman Kiselenko

Reputation: 44360

it's best to check on the client side
create word_couter.js.coffee in app/assets/javascripts
include to app/assets/javascripts/application.js.coffee
this file #= require word_couter

$ ->
  $('[name="you_input"]').on "change", ->
    input_size = $(@).val().split " "
    if input_size.length > 3
      ...some code here ....

I hope this help!

Upvotes: 0

Marek Lipka
Marek Lipka

Reputation: 51151

I would probably write custom validation method in Meet model:

class Meet < ActiveRecord::Base

  # ...
  validate :no_more_than_three_tags
  # ...
  def no_more_than_three_tags
    errors.add(:tags, 'more than three words') if tags.split(/\W/).count > 3
  end
end

Upvotes: 3

stevenspiel
stevenspiel

Reputation: 5999

Without any code to go off of, I would think you have a method with an argument, tags. If so, you might do something like this.

 def method(tags)
   array = tags.split(" ")
   raise ArgumentError.new("More than three words entered") if array.size > 3
 end

Upvotes: 0

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