Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Tree: 55bd299a4b
Fetching contributors…

Cannot retrieve contributors at this time

31 lines (19 sloc) 1.043 kB

Validates Lengths from Database

Few people add length validations to fields in their database, and when saving such fields that have exhausted their length, an SQL error occurs. This gem introspects your table schema for maximum lengths on string and text fields and automatically adds length validations to the model.

Installation

Include the gem using bundler in your Gemfile:

gem "validates_lengths_from_database"

Usage

In your model you can activate validations:

class Post < ActiveRecord::Base
  validates_lengths_from_database
end

It also supports filter-style :only and :except options:

class Post < ActiveRecord::Base
  validates_lengths_from_database :only => [:title, :contents]
end

class Post < ActiveRecord::Base
  validates_lengths_from_database :except => [:other_field]
end

Note that this cannot be done at a global level directly against ActiveRecord::Base, since the validates_length_from_database method requires the class to have a table name (with the ability to load the schema).

Jump to Line
Something went wrong with that request. Please try again.