2

一切正常，直到我推送到heroku，我认为这与mysql和postgres显示布尔值的不同方式有关？

我在Max OSX上使用Ruby 1.9.2p318和Rails 3.2.2和Mysql 5.2.35

这是我要运行的查询

@special_offers = Wine.find(:all, :include => [:inventories], :conditions => ["inventories.special = ? AND inventories.warehouse_id IN (?)", "true", @wharehouses_array], :order => "inventories.updated_at DESC", :limit => 3)

似乎问题出在inventories.special = ?, "true" 这在 mysql 上可以正常工作，但当我推送到 heroku 时却不行，这是使用 postgres

我尝试用 1 和“1”和“t”和 t 和 true 替换“true”，但似乎没有任何效果？

更新：
Heroku 日志文件 

2012-04-04T14:06:58+00:00 app[web.1]: [2012-04-04 14:06:58] INFO  WEBrick 1.3.1
2012-04-04T14:06:58+00:00 app[web.1]: [2012-04-04 14:06:58] INFO  WEBrick::HTTPServer#start: pid=1 port=54181
2012-04-04T14:06:58+00:00 app[web.1]: [2012-04-04 14:06:58] INFO  ruby 1.9.2 (2011-07-09) [x86_64-linux]
2012-04-04T14:06:59+00:00 heroku[web.1]: State changed from starting to up
2012-04-04T14:07:01+00:00 app[web.1]: => Booting WEBrick
2012-04-04T14:07:01+00:00 app[web.1]: => Call with -d to detach
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2012-04-04T14:07:01+00:00 app[web.1]: 
2012-04-04T14:07:01+00:00 app[web.1]: => Rails 3.2.2 application starting in production on http://0.0.0.0:54181
2012-04-04T14:07:01+00:00 app[web.1]: 
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架构文件：用于库存表

create_table "inventories", :force => true do |t|
    t.integer   "wine_id"
    t.integer   "warehouse_id"
    t.integer   "stock"
    t.float     "price"
    t.integer   "quantity_id"
    t.timestamp "created_at"
    t.timestamp "updated_at"
    t.boolean   "available",                        :default => false
    t.boolean   "discount",                         :default => false
    t.string    "markupprofile_id",   :limit => 45
    t.string    "discountprofile_id", :limit => 45
    t.float     "discount_price"
    t.boolean   "special",                          :default => false
  end
4

1 回答 1

2

使用实际的 TrueClass，而不是字符串，Rails 会为您将其转换为正确的查询。

正确的：

"inventories.special = ?", true

不正确：

"inventories.special = ?", "true"

它不会引发错误，因为第二个仍然会产生有效的查询，它只是在寻找其中 special 是包含实际真实字符的字符串的记录。

于 2012-04-04T14:23:03.037 回答