NestedAttributesValidator
Nested Attributes Validation Collection for Rails
Installation
Add this line to your application's Gemfile:
gem 'nested_attributes_validator'And then execute:
$ bundle install
Or install it yourself as:
$ gem install nested_attributes_validator
Usage
nested_attributes_uniqueness
# uniqueness validation for one field of child model
validates :children,
nested_attributes_uniqueness: {
fields: :field1,
ignore_nil: true # the child record will be ignored if the field is nil.(default: false)
}
# uniqueness validation for multiple fields of child model
validates :children,
nested_attributes_uniqueness: {
fields: [:field1, :field2],
display_field: :field3, # the error will be added to this field when the validation failed.
ignore_nil: true # the child record will be ignored if all fields are nil.(default: false)
}nested_attributes_order
# order validation for one field of child model
validates :children,
nested_attributes_order: {
fields: :field1,
ignore_nil: true, # the child record will be ignored if the field is nil.(default: false)
condition: lambda{|a, b| a > b} # lambda function for order verification.(default: lambda{|a, b| a < b})
}
# order validation for multiple fields of child model
validates :children,
nested_attributes_order: {
fields: [:field1, :field2],
display_field: :field3, # the error will be added to this field when the validation failed.
ignore_nil: true, # the child record will be ignored if the all fields are nil.(default: false)
condition: lambda{|a, b| a.join > b.join} # lambda function for order verification.(default: lambda{|a, b| a < b})
}I18n
en:
errors:
messages:
nested_attributes_not_unique: "error message for not unique"
nested_attributes_invalid_order: "error message for invalid order"Contributing
- Fork it!
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Add some feature')
- Push to the branch (git push origin my-new-feature)
- Create a new Pull Request
License
The gem is available as open source under the terms of the MIT License.