使用 Ransack 时如何验证输入？

Question

我使用 Ransack 创建了一个包含多个搜索栏的搜索表单，并意识到即使模型中有 validates 代码，我仍然会得到搜索结果，而某些输入栏为空白。

ticket.rb

class Ticket < ApplicationRecord
  validates :departure, presence: true
  validates :arrival, presence: true 
  validates :departure_date, presence: true
  
end

有人知道在使用 Ransack 时如何验证正确的方法吗？

Answer 1

您会理解复杂的验证流程。您的模型在验证后收到错误，您的控制器回退到 post 操作以呈现编辑表单和表单字段显示错误。简短的例子：

app/controllers/companies_controller.rb:

class CompanyController < ApplicationController
  def index
    @search = CompanySearchForm.new(name: company_search_params[:name])
    @search.validate
    @companies = Company.ransack(name_eq: company_search_params[:name]).result
  end

  ...
  private

  def company_search_params
    params.require(:company_search_form).permit(:name)
  end

  def search_form
    form = ::CompanySearchForm.new(name: company_search_params[:name])
    form.validate
    form
  end
end

app/forms/copmany_search_form.rb

class CompanySearchForm
  extend ActiveModel::Naming
  extend ActiveModel::Translation
  include ActiveModel::Validations
  include ActiveModel::Conversion
  include ActiveModel::Validations::Callbacks
  include ActiveRecord::AttributeAssignment

  attr_reader :name

  def initialize(name:)
    @name = name
  end

  def validate
    errors.add(:name, 'search string is too long.') if name.size > 5
  end
end

app/views/companies/index.html.haml

= simple_form_for(@search, url: companies_path, method: :get) do |f|
  = f.input :name

  = submit_tag('Search', class: 'btn')

%table
  = @companies.each do |company|
    %tr
      %td= company.id
      %td= company.name

关于工作示例请转到here