這樣做只是一個查詢搜索，將其保存到一個數組，然後只搜索陣列，而不是做多的SQL查詢

Question

我有這個

class PagesController < ApplicationController 
def index 
    @textos = Texto.all 
    @texto_historia   = Texto.where(:title => "História").first.contents 
    @texto_capas_para_sofa = Texto.where(:title => "Capas para Sofá").first.contents 
    @texto_cortinas   = Texto.where(:title => "Cortinas").first.contents 
    @texto_almofadas  = Texto.where(:title => "Almofadas").first.contents 
end 

的SQL輸出爲：

 
    ←[1m←[36mTexto Load (2.0ms)←[0m ←[1mSELECT "textos".* FROM "textos"←[0m 
    ←[1m←[35mTexto Load (1.0ms)←[0m SELECT "textos".* FROM "textos" WHERE ("textos"."title" = 'Hist├│ria') LIMIT 1 
    ←[1m←[36mTexto Load (0.0ms)←[0m ←[1mSELECT "textos".* FROM "textos" WHERE ("textos"."title" = 'Capas para Sof├í') LIMIT 1←[0m 
    ←[1m←[35mTexto Load (1.0ms)←[0m SELECT "textos".* FROM "textos" WHERE ("textos"."title" = 'Cortinas') LIMIT 1 
    ←[1m←[36mTexto Load (1.0ms)←[0m ←[1mSELECT "textos".* FROM "textos" WHERE ("textos"."title" = 'Almofadas') LIMIT 1←[0m 
    ←[1m←[35mTexto Load (0.0ms)←[0m SELECT "textos".* FROM "textos" WHERE ("textos"."title" = 'Informa├º├╡es de Contato') LIMIT 1 

我希望僅對所有「textos」模型執行一個查詢，然後在數組內或類似的東西中搜索以獲取特定變量。

Answer 1

您將需要獲得所有ActiveRecord對象的數組並將其轉換成一個散列存儲你所需要的數據。

@textos = Texto.all.inject({}) {|h, obj| h[obj.title] = obj.contents; h } 

然後，你將能夠與@textos["title"]訪問您的內容。

Answer 2

我想你想的find or find_all選項：

@texto_historia = @texto.find { |a| a.title = "História"}