設置搜索模式以環繞用戶模型

Question

我終於能夠爲我的高級搜索提供某種結構。這個想法是有一個從用戶模型中提取數據的搜索。所以我建立了一個搜索模型，這將是一種圍繞用戶模型的包裝。例如：當我說Search.search_for（選項）時，在search_for方法中，它將使用選項在用戶模型上搜索並返回結果，您可以在頁面上顯示結果。我想到了這種方法，因爲我被告知必須複製這些值，但我想我只需要使Search調用底層（已經存在的）用戶模型。

所以我有一個用戶可以從哪裏搜索的視圖。我必須收集他們想要搜索的所有選項（性別，年齡，郵政編碼，他們是否有孩子，宗教和種族）。收集選項並將表單提交給SearchController。

我有這個概念，但是因爲我是Rails新手，所以我一直在努力執行。下面的代碼實質上就是我所擁有的（減去用戶模型，因爲它充滿了來自應用程序的其他部分）。我不知道如何完成剩下的編碼來解決這個問題。

Searches_controller：

def new 
    @search = Search.new 
    end 

    def create 
    @search = Search.new(params[:search]) 
    if @search.save 
     redirect_to @search 
    else 
     render 'new' 
    end 
    end 

    def show 
    @search = Search.find(params[:id]) 
    @users = Users.search(params) 
    end 
end 

搜索模式：

attr_accessible :age, :children, :ethnicity, :gender, :religion, :zip_code 

    def users 
    @users ||= find_users 
    end 

    def self.search(params) 

    end 

private 

def find_users 
    users = User.order(:id) 
    users = users.where(gender: gender) if gender 
    users = users.where(:ethnicity => ethnicity) if ethnicity 
end 

new.html（高級搜索頁）：

<%= form_for @search do |f| %> 
<div class="field"> 
    <%= f.label :gender %><br /> 
    <%= f.select :gender, ['man', 'woman'], :include_blank => true %> 
</div> 

    <div class="field"> 
    <%= f.label :zip_code %><br /> 
    <%= f.text_field :zip_code %> 
    </div> 
    <div class="field"> 
    <%= f.label :children %><br /> 
    <%= f.select :children, ['Yes, they live with me', 'I want kids now', "I want one someday", "Not for me"], :include_blank => true %> 
    </div> 
    <div class="field"> 
    <%= f.label :religion %><br /> 
    <%= f.select :religion, ["Agnostic", "Atheist", "Christian", "Catholic", "Buddhist", "Hindu", "Jewish", "Muslim", "Spiritual without affiliation", "Other", "None", "Prefer not to say"], :include_blank => true %> 
    </div> 
    <div class="field"> 
    <%= f.label :ethnicity %><br /> 
    <%= f.select :ethnicity, ["Asian", "Biracial", "Indian", "Hispanic/Latin", "Middle Eastern", "Native American", "Pacific Islander", "White", "Other"], :include_blank => true %> 
    </div> 
    <div class="actions"><%= f.submit "Search" %></div> 
<% end %> 

show.html（視圖來顯示結果）：

<%= render @search.users %> 

開發日誌：

Started POST "/searches" for 127.0.0.1 at 2013-05-06 14:00:54 -0400 
Processing by SearchesController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"Pher65dG6gRU9NGgv2q1ot0cfjq+MELgXE6dOtvcrY0=", "search"=>{"gender"=>"", "zip_code"=>"", "children"=>"", "religion"=>"", "ethnicity"=>"Asian"}, "commit"=>"Search"} 
    [1m[36m (0.2ms)[0m [1mBEGIN[0m 
    [1m[35mSQL (107.5ms)[0m INSERT INTO `searches` (`age`, `children`, `created_at`, `ethnicity`, `gender`, `religion`, `updated_at`, `zip_code`) VALUES (NULL, NULL, '2013-05-06 18:00:54', 0, NULL, NULL, '2013-05-06 18:00:54', '') 
    [1m[36m (60.1ms)[0m [1mCOMMIT[0m 
Redirected to http://localhost:3000/searches/25 
Completed 302 Found in 276ms (ActiveRecord: 167.7ms) 


Started GET "/searches/25" for 127.0.0.1 at 2013-05-06 14:00:54 -0400 
Processing by SearchesController#show as HTML 
    Parameters: {"id"=>"25"} 
    [1m[35mSearch Load (0.5ms)[0m SELECT `searches`.* FROM `searches` WHERE `searches`.`id` = 25 LIMIT 1 
    [1m[36mUser Load (73.2ms)[0m [1mSELECT `users`.* FROM `users` WHERE `users`.`zip_code` = '' AND `users`.`ethnicity` = '0' ORDER BY id[0m 
    Rendered collection (0.0ms) 
    Rendered searches/show.html.erb within layouts/application (81.4ms) 
    [1m[35mUser Load (0.6ms)[0m SELECT `users`.* FROM `users` WHERE `users`.`auth_token` = 'LTzif2q6921TM4pQzfmEGg' LIMIT 1 
Completed 200 OK in 309ms (Views: 224.6ms | ActiveRecord: 74.3ms) 

Answer 1

好吧，首先請確保User模型和Search模型具有完全相同的屬性，所以gender, zip_code, children, religion和ethnicity。

唯一需要有不同列名的時候是，如果你想做一些更復雜的事情，比如搜索一個範圍，例如用戶表有age，那麼搜索表可能有min_age和max_age。

搜索控制器：

def new 
    @search = Search.new 
end 

def create 
    @search = Search.new(params[:search]) 
    if @search.save 
    redirect_to @search 
    else 
    render 'new' 
    end 
end 

def show 
    @search = Search.find(params[:id]) 
    @users = @search.users 
end 

搜索模式：

def users 
    users = User.order(:id) 
    users = users.where(gender: gender) if gender 
    users = users.where(zip_code: zip_code) if zip_code 
    users = users.where(children: children) if children 
    users = users.where(religion: religion) if religion 
    users = users.where(ethnicity: ethnicity) if ethnicity 
    users 
end 

在app/views/searches/show.html.erb：

<h1>Search results</h1> 
<%= render @users %> 

，並確保您有部分app/views/users/_user.html.erb的東西，如：

<p><%= user.name %> - <%= user.email %></p> # or whatever 

現在轉到搜索表單並創建一個新的搜索對象，從URL中獲取ID（假設它是34）。 然後進入rails console做：

@search = Search.find(34) 
# should return something like: gender: "male", zip_code: nil, children: "Yes".. 

# then try the users method: 
@search.users 

不知道爲什麼你的觀點是行不通的。請確保您在show作用下，您的搜索控制器具有@users = @search.users，然後去views/searches/show.html.erb做：

<% @users.each do |user| %> 
    <p><%= user.name %></p> 
<% end %> 

，看看是否有效。