无法显示来自控制器的数组值多查询

Question

我试图通过控制器显示每年每个月的数组值，但没有显示任何内容。

这里是资料和演示：

CREATE TABLE player_scores (id INT,name text,date_score date,goals INT );
CREATE TABLE months (id INT,name text );

INSERT INTO player_scores VALUE
 ( 1, 'PIZARRO'   , '2015-01-02', 4),
 ( 2, 'ROBBEN'    , '2015-02-24', 2),
 ( 3, 'RIBERY'    , '2015-03-02', 4),
 ( 4, 'GOTZE'     , '2015-04-24', 2),
 ( 5, 'NEIWER'    , '2015-05-02', 4),
 ( 6, 'DANTE'     , '2015-06-24', 2),
 ( 7, 'LEWANDOSKI', '2015-07-02', 4),
 ( 8, 'RAFINHA'   , '2015-07-02', 4),
 ( 9, 'GUARDIOLA' , '2015-11-02', 3);

INSERT INTO months VALUE
 ( 1, 'jan'),
 ( 2, 'feb'),
 ( 3, 'mar'),
  ...      
 ( 12,'dec');

这是控制器：

def germany_world_cup
   @months= Month.all

   ## THIS LINE WILL REPEAT THE QUERY 12 TIMES FOR EACH MONTH JANUARY TO DECEMBER 
   @months.each do |m|
      @query = PlayerScore.find_by_sql("SELECT count(*) AS count_all FROM player_scores WHERE YEAR(date_score)=2015 AND MONTH(date_score)='#[m.id}' ")
   end
end

这是有问题的视图（未显示值）：

<% @query.each do |q| %> 
  <%= q.count_all %>  ### IS SHOWING only 0 as result
<% end %>

这是我的日志实际工作但未显示在视图中：

select count(*) as count_all from player_scores where month(date_score)=1 and year(date_score)=2015
select count(*) as count_all from player_scores where month(date_score)=2 and year(date_score)=2015
...
select count(*) as count_all from player_scores where month(date_score)=12 and year(date_score)=2015

根据 rails sintaxis 显示来自控制器的值是

<% @var.each do |v| %>
   <%= v.column_name %>
<% end %>

我试过这段代码来检查值，但一无所获：

<%= @query.inspect %>  ### I got " [#] " as result

我试过这段代码：

<% @query[0].each do |q| %> 
  <%= q.count_all %>   ### I GOT THIS ERROR "undefined method `each' "
<% end %>

我想在控制器中显示数组的值

有人可以告诉我显示值吗？

提前致谢。

Answer 1

避免 @query 变量覆盖的方法是使用 #map:

@query = @months.map do |m|
   PlayerScore.find_by_sql("SELECT count(*) AS count_all FROM player_scores WHERE YEAR(date_score)=2015 AND MONTH(date_score)='#[m.id}' ")
end

无法显示来自控制器的数组值多查询

Can't show array values multi query from the controller

ruby

ruby-on-rails

ruby-on-rails-3