Question

我有以下代码行在本地工作正常，但在推送到Production（Heroku）时中断：

def self.find_unresolved_with_approved_client
  self.joins(:client).where('clients.approved = true AND wish.status <> "Resolved"')
end

我的heroku日志中的错误如下：

2012-04-09T11:49:14+00:00 app[web.1]: ActionView::Template::Error (PGError: ERROR:  column "Resolved" does not exist
2012-04-09T11:49:14+00:00 app[web.1]:     16:       %th{ :class => :span10 } Subject
2012-04-09T11:49:14+00:00 app[web.1]:     17:       %th{ :class => :span4 } Status
2012-04-09T11:49:14+00:00 app[web.1]: LINE 1: ...ERE (clients.approved = true AND wishes.status != "Resolved"...
2012-04-09T11:49:14+00:00 app[web.1]: : SELECT  "wishes".* FROM "wishes" INNER JOIN "clients" ON "clients"."id" = "wishes"."client_id" WHERE (clients.approved = true AND wishes.status != "Resolved") ORDER BY wishes.id LIMIT 25 OFFSET 0):

为什么在本地进行文字比较时尝试对Production进行列比较？

Answer 1

您应该将查询更改为.where（'clients.approved =？AND wish.status！=？'，true，'已解决'）这使得适配器为您构建查询，这将解决不同数据库具有略微不同的查询语法的问题

关于Heroku（Postgres）的Where子句中断但在本地工作正常（MySQL）

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