Rails + Ransack：首先按association.name ='string'排序，然後按字母順序排序其他所有內容

Question

我有has_many book_versions（平裝書，精裝版，sixpack）書籍。

在索引頁面初始加載，它加載此查詢：

@search = Book.includes(:book_versions).search(params[:q]) 

當有人試圖進行排序，我現在有這個疑問：

@search = Book.includes(:book_versions).where(:book_versions => { :name => params[:book_version_name ] }).search(params[:q]) 

這樣做的問題是，如果params[:book_version_name] = 'paperback'它只發回book_versions.name ='paperback'的book_versions。這意味着沒有其他結果顯示。相反，我希望它！

1. 首秀與NAME = '平裝本'
2. 顯示所有與NAME = '平裝本'

我將如何做到這一點的book_versions的book_versions？謝謝。

Answer 1

似乎你總是想要所有的書，所以堅持你的第一個查詢，然後在ruby中進行分組？

@result = Book.includes(:book_versions).search(params[:q]) 
@book_version_name = params[:book_version_name] 

# in memory filtering of the result 
@primary = @result.select { |x| x.book_version.name == @book_version_name } 
@secondary = @result.select { |x| x.book_version.name != @book_version_name } 

看到紅寶石選擇（未軌道數據庫法）http://ruby-doc.org/core-2.0.0/Enumerable.html#method-i-select

# the above could probably be written this way as well 
@primary = @result.select { |x| x.book_version.name == @book_version_name } 
@secondary = @result - @primary