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Allow passing a Proc or Symbol as an argument to length validator values #30674



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@prognostikos prognostikos commented Sep 21, 2017

This brings the Length validator in line with the Numericality validator, which currently supports Proc & Symbol arguments.

An example:

class Topic
  include ActiveModel::Validations

  attr_accessor :title, :foo

  validates :title, length: { maximum: ->(topic) { topic.max_length_for_title } }

  def max_length_for_title
    if foo

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Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @pixeltrix (or someone else) soon.

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I would love to get rid of my freedom patch for this feature - is there any chance this PR will be accepted? Any feedback is appreciated.

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@rafaelfranca rafaelfranca left a comment

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Could you add a CHANGELOG entry and squash your commits? I'll merge after that.

This brings the Length validator in line with the Numericality
validator, which currently supports Proc & Symbol arguments
@prognostikos prognostikos force-pushed the allow_procs_for_length_validator branch from 661da58 to b8b089e Compare October 26, 2017 08:02
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Contributor Author

@rafaelfranca done, thanks for taking care of this.

@rafaelfranca rafaelfranca merged commit 12de5e2 into rails:master Oct 26, 2017
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Thanks for this change @prognostikos, this change helped me at work today! You are awesome! 🙂

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5 participants