Question

我正在尝试使用虚假活动记录（在db中没有持久性的模型）。

我按照这个例子： https://quickleft.com/blog/using-faux-activerecord-models-in-rails-3/

我有这个错误：

SearchController中的ArgumentError #new 错误的参数数量（2对1）

app / models / search.rb:32:in assign_attributes' app/models/search.rb:27:in初始化＆＃39; app / controllers / search_controller.rb：4：new' app/controllers/search_controller.rb:4:in新＆＃39;

看来，当你调用Search.new时，它需要参数，但我的目标是使它成为一个空的搜索对象。

这是我的模型，控制器，视图，路线：

模型

    class Search

  include ActiveModel::MassAssignmentSecurity

  TRUE_VALUES = ActiveRecord::ConnectionAdapters::Column::TRUE_VALUES

  attr_accessor :query
  attr_reader :safe_search, :results_per_page

  alias_method :safe_search?, :safe_search

  attr_accessible :query, :safe_search, :results_per_page

  RESULTS_PER_PAGE = [10, 25, 50, 100].freeze

  include ActiveModel::Conversion
  include ActiveModel::Validations

  validates :query, presence: true
  validates :results_per_page, presence: true, inclusion: { in: RESULTS_PER_PAGE }

  def persisted?
    false
  end  

  def initialize(attributes = {})
    assign_attributes(attributes)
    yield(self) if block_given?
  end

  def assign_attributes(values, options = {})
    sanitize_for_mass_assignment(values, options[:as]).each do |k, v|
      send("#{k}=", v)
    end
  end

  def results_per_page=(value)
    @results_per_page = value.to_i
  end

  def safe_search=(value)
    @safe_search = TRUE_VALUES.include?(value)
  end

end

控制器

    class SearchController < ApplicationController

  def new
    @search = Search.new
    render "search/new.html.erb"
  end

  def create
    @search = Search.new(params[:search])

    # TODO: use the @search object to perform a search.  Adding
    # a `results` method on the search object might be a good starting point.
  end

end

查看：search / new.html.erb

<%= form_for @search do |f| %>

  <%= f.label :query %>
  <%= f.text_field :query %>

  <%= f.label :safe_search %>
  <%= f.check_box :safe_search  %>

  <%= f.label :results_per_page %>
  <%= f.select_box :results_per_page  %>

<%= end %>

Answer 1

以下是我找到的解决方案：在我使用的模型中：

  def initialize(attributes = {})
      assign_attributes(attributes)
  end

  def assign_attributes(attributes)
    sanitize_for_mass_assignment(attributes).each do |k, v|
      send("#{k}=", v)
    end
  end

以下是我在控制器中的new和create方法：

  def new
    @search = Search.new
    render "search/new.html.erb"
  end

  def create
    @search = Search.new(params[:search])
    respond_to do |format|
      format.html { render :template => "search/create.html.erb" }
    end 
  end

顺便说一下，我必须将我的控制器重命名为SearchesController，因为控制器必须是多元化的。

这是我的new.html.erb视图：

<%= form_for @search, url: { action: "create" }, :method => :post do |f| %>

  <%= f.label :query %>
  <%= f.text_field :query %>

  <%= f.label :safe_search %>
  <%= f.check_box :safe_search  %>

  <%= f.label :results_per_page %>
  <%= f.select(:results_per_page, [10, 25, 50, 100])  %>

  <%= f.submit %>

<% end %>

我希望这对某些人有用。

rails faux active record

1 个答案: