![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
&tag(Rails/検証);
class Person < ActiveRecord::Base validates :name, presence: true end Person.create(name: "John Doe").valid? # => true Person.create(name: nil).valid? # => false
gem "validate_url"
class User < ActiveRecord::Base
validates :homepage, url: { allow_blank: true }
end
class Invoice < ApplicationRecord
validate :expiration_date_cannot_be_in_the_past,
:discount_cannot_be_greater_than_total_value
def expiration_date_cannot_be_in_the_past
if expiration_date.present? && expiration_date < Date.today
errors.add(:expiration_date, "過去の日付は使えません")
end
end
def discount_cannot_be_greater_than_total_value
if discount > total_value
errors.add(:discount, "合計額を上回ることはできません")
end
end
end
../Bootstrapを参照のこと。
# GET /items/new
def new
@item = Item.new
end
# GET /items/1/edit
def edit
end
# POST /items
# POST /items.json
def create
@item = Item.new(item_params)
respond_to do |format|
if @item.save
format.html { redirect_to @item, notice: 'Item was successfully created.' }
format.json { render :show, status: :created, location: @item }
else
format.html { render :new }
format.json { render json: @item.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /items/1
# PATCH/PUT /items/1.json
def update
respond_to do |format|
if @item.update(item_params)
format.html { redirect_to @item, notice: 'Item was successfully updated.' }
format.json { render :show, status: :ok, location: @item }
else
format.html { render :edit }
format.json { render json: @item.errors, status: :unprocessable_entity }
end
end
end
