module WeakParameters

Provides `validates` DSL to controllers to validate params.

Examples

# POST /recipes { name: "alice" }              #=> 201
# POST /recipes { name: "alice", type: 1 }     #=> 201
# POST /recipes { name: "alice", type: "bob" } #=> 400
# POST /recipes { type: 1 }                    #=> 400
class RecipesController < ApplicationController
  rescue_from WeakParameters::ValidationError do |exception|
    render text: exception.message, status: 400
  end

  validates :create do
    string :name, required: true
    integer :type
  end

  def create
    respond_with Recipe.create(params.slice(:name, :type))
  end
end

# WeakParameters.stats has its definitions.
WeakParameters::stats[:recipes][:create].validators[0].key       #=> :name
WeakParameters::stats[:recipes][:create].validators[0].required? #=> true
WeakParameters::stats[:recipes][:create].validators[1].key       #=> :type
WeakParameters::stats[:recipes][:create].validators[1].required? #=> false

Constants

VERSION

Public Class Methods

stats() click to toggle source

# File lib/weak_parameters.rb, line 52
def self.stats
  @stats ||= ActiveSupport::HashWithIndifferentAccess.new do |hash, key|
    hash[key] = ActiveSupport::HashWithIndifferentAccess.new
  end
end