Change Error Field Name in Rails

Change error field name in Rails

The general practice now-a-days is to edit your locals like so:

# config/locales/en.yml
en:
  activerecord:
    attributes:
      user:
        fname: "First Name"

Your error message will now say "First Name can't be..."

For completeness sake, you have another option. Which is to add the following to your User Model:

class User < ActiveRecord::Base

  HUMANIZED_ATTRIBUTES = {
    :fname => "First Name"
  }

  def self.human_attribute_name(attr, options = {}) # 'options' wasn't available in Rails 3, and prior versions.
    HUMANIZED_ATTRIBUTES[attr.to_sym] || super
  end

end

Changing Rails Active record column name 's error message

Change it like this:

class Contactu < ActiveRecord::Base
  validate :cname, presence: { message: 'user-friendly message' }
  validate :cdetails, presence: true
end

In order to hide field names, also use the following code to display your error messages:

model.errors.full_messages.join('<br>')

How to change change error messages on rails

I suppose you want to translate "Value must be grater than or equal to 0", if that's the case, what you need to do is create a translation for that on the locale file. In Spanish will be something like this:

# config/locales/es.yml
es:
  activerecord:
    errors:
      models:
        product:
          attributes:
            amount:
              greater_than_or_equal_to: 'What ever you want to say'

Depending on your native language, you have to create the file and define the message, I think you are doing it already, because you are using translations:

#{t('product.shineer_irsen')}

You can find more information here:

http://guides.rubyonrails.org/i18n.html#translations-for-active-record-models

How to add custom validation message on field name without field name as a prefix?

You could write a custom validation, and add the error message to the record as a whole, instead of a particular attribute as follows:

validate :name_is_present

private

# Making this private is optional, but recommended
def name_is_present
  errors.add(:base, "Promo code required") if name.blank?
end

For more details, refer to the explanation in Ruby guides here

How to change default validation error messages on belongs_to field

It has key required, try:

en:
  activerecord:
    errors:
      messages:
        required: "custom required message"

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