我有一个复杂的连接条件,有三个插值是双引号(作为AR引用的一部分,以避免SQL注入攻击,我认为)。
我已经准备好了其他问题,说我可以使用:sanitize_sql
或:sanitize_sql_array
和?
占位符,但唉,这些似乎未定义activerecord-sqlserver-adapter
。
所以,我的问题是,如何通过ActiveRecord与SQL服务器一起工作?
def self.with_active_deal_counts
joins(<<-SQL.squish
LEFT OUTER JOIN (
SELECT [b].[merchant_id], COUNT(*) deal_count
FROM [tbl_deal] b
WHERE deal_active = 1
AND deal_archive = 2
AND ( deal_end = '1900-01-01'
OR deal_end > '#{Time.now + Time.now.utc_offset - 1.day}')
AND deal_start <= '#{Time.now + Time.now.utc_offset}'
GROUP BY [b].[merchant_id]
) a ON a.[merchant_id] = [tbl_merchant].[merchant_id]
SQL
).select("tbl_merchant.*, a.deal_count")
end
这会产生
EXEC sp_executesql N'SELECT tbl_merchant.*, a.deal_count FROM [tbl_merchant] LEFT OUTER JOIN (
SELECT [b].[merchant_id], COUNT(*) deal_count
FROM [tbl_deal] b
WHERE deal_active = 1
AND deal_archive = 2
AND ( deal_end = ''1900-01-01''
OR deal_end > ''2013-09-30 07:07:20 -0700'')
AND deal_start <= ''2013-10-01 07:07:20 -0700''
GROUP BY [b].[merchant_id]
) a ON a.[merchant_id] = [tbl_merchant].[merchant_id]'
...由于双引号值而无效,例如。 ''2013-09-30 07:07:20 -0700''
具体来说,我得到Incorrect syntax near '1900'
(在SQL Management Studio中运行查询时。
答案 0 :(得分:0)
我知道你的问题是关于占位符的,我不确定。我遇到了类似的情况,最后使用ruby“插入字符串”,这可能值得一看。
%Q
(http://en.wikibooks.org/wiki/Ruby_Programming/Syntax/Literals)或对于多行sql,heredoc可能很方便。以下是如何将%Q
用于sql:
sql = %Q[ some crazy SQL with '#{Time.now}' ]
示例用法如下:
sql = %Q[ select '#{Time.now}' ]
# This translates to
N' select ''2013-10-01 16:25:46 -0400'' '
=> #<ActiveRecord::Result:0x000000052acc40 @columns=[""], @rows=[["2013-10-01 16:25:46 -0400"]], @hash_rows=nil>