使rails3-autocomplete-jquery gem与带有多个输入的Simple_Form很好地配合 [英] Getting rails3-autocomplete-jquery gem to work nicely with Simple_Form with multiple inputs

问题描述

因此，我尝试使用此gem 和simple_form和am实现多个自动完成功能出现错误.

So I am trying to implement multiple autocomplete using this gem and simple_form and am getting an error.

我尝试过:

<%= f.input_field :neighborhood_id, collection: Neighborhood.order(:name), :url => autocomplete_neighborhood_name_searches_path, :as => :autocomplete, 'data-delimiter' => ',', :multiple => true, :class => "span8" %>

这是我得到的错误:

undefined method `to_i' for ["Alley Park, Madison"]:Array

在我的参数中，它是在neighborhood_id中发送的:

In my params, it is sending this in neighborhood_id:

"search"=>{"neighborhood_id"=>["Alley Park, Madison"],

因此，这些值甚至都没有使用ID.

So it isn't even using the IDs for those values.

有人有什么想法吗?

对于@jvnill的问题，我没有明确地对控制器中的params[:search]做任何事情.搜索将创建一条新记录，并且正在搜索listings.

In response to @jvnill's question, I am not explicitly doing anything with params[:search] in the controller. A search creates a new record, and is searching listings.

在我的Searches Controller中，create操作中，我只是在这样做:

In my Searches Controller, create action, I am simply doing this:

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

然后我的search.rb(即搜索模型)具有以下内容:

Then my search.rb (i.e. search model) has this:

def listings
    @listings ||= find_listings
end

private
  def find_listings
    key = "%#{keywords}%"
    listings = Listing.order(:headline)
    listings = listings.includes(:neighborhood).where("listings.headline like ? or neighborhoods.name like ?", key, key) if keywords.present?
    listings = listings.where(neighborhood_id: neighborhood_id) if neighborhood_id.present?
    #truncated for brevity
    listings
  end

推荐答案

首先，如果表单返回ID而不是邻居的名称，这会更容易.我还没有使用过宝石，所以我不知道它是如何工作的.阅读自述文件说它将返回ID，但我不知道为什么您只得到名字.我敢肯定，一旦您弄清楚如何返回ID，就可以更改下面的代码以适应这种情况.

First of all, this would be easier if the form is returning the ids instead of the name of the neighborhood. I haven't used the gem yet so I'm not familiar how it works. Reading on the readme says that it will return ids but i don't know why you're only getting names. I'm sure once you figure out how to return the ids, you'll be able to change the code below to suit that.

您需要在邻域和搜索之间创建联接表.我们称其为search_neighborhoods.

You need to create a join table between a neighborhood and a search. Let's call that search_neighborhoods.

rails g model search_neighborhood neighborhood_id:integer search_id:integer
# dont forget to add indexes in the migration

之后，您要设置模型.

# search.rb
has_many :search_neighborhoods
has_many :neighborhoods, through: :search_neighborhoods

# search_neighborhood.rb
belongs_to :search
belongs_to :neighborhood

# neighborhood.rb
has_many :search_neighborhoods
has_many :searches, through: :search_neighborhoods

现在我们已经设置了关联，我们需要设置设置器和属性

Now that we've setup the associations, we need to setup the setters and the attributes

# search.rb
attr_accessible :neighborhood_names

# this will return a list of neighborhood names which is usefull with prepopulating
def neighborhood_names
  neighborhoods.map(&:name).join(',')
end

# we will use this to find the ids of the neighborhoods given their names
# this will be called when you call create!
def neighborhood_names=(names)
  names.split(',').each do |name|
    next if name.blank?
    if neighborhood = Neighborhood.find_by_name(name)
      search_neighborhoods.build neighborhood_id: neighborhood.id
    end
  end
end

# view
# you need to change your autocomplete to use the getter method
<%= f.input :neighborhood_names, url: autocomplete_neighborhood_name_searches_path, as: :autocomplete, input_html: { data: { delimiter: ',', multiple: true, class: "span8" } %>

最后但并非最不重要的是更新find_listings

last but not the least is to update find_listings

def find_listings
  key = "%#{keywords}%"
  listings = Listing.order(:headline).includes(:neighborhood)

  if keywords.present?
    listings = listings.where("listings.headline LIKE :key OR neighborhoods.name LIKE :key", { key: "#{keywords}")
  end

  if neighborhoods.exists?
    listings = listings.where(neighborhood_id: neighborhood_ids)
  end

  listings
end

就这样:)

更新:使用f.input_field

UPDATE: using f.input_field

# view
<%= f.input_field :neighborhood_names, url: autocomplete_neighborhood_name_searches_path, as: :autocomplete, data: { delimiter: ',' }, multiple: true, class: "span8" %>

# model
# we need to put [0] because it returns an array with a single element containing
# the string of comma separated neighborhoods
def neighborhood_names=(names)
  names[0].split(',').each do |name|
    next if name.blank?
    if neighborhood = Neighborhood.find_by_name(name)
      search_neighborhoods.build neighborhood_id: neighborhood.id
    end
  end
end

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