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

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prognostikos
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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
      5
    else
      10
  end
end

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@prognostikos
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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
@prognostikos
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@rafaelfranca done, thanks for taking care of this.

@rafaelfranca rafaelfranca merged commit 12de5e2 into rails:master Oct 26, 2017
@manojmj92
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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