Question

过去几天我一直在研究MetaWhere的功能。大多数预测都非常简单，但我仍然坚持如何使用in_all和in_any。

以下是我的一些尝试：

Group.where(:id.in_any => [1,2,3])
  => SELECT `groups`.* FROM `groups` WHERE ((`groups`.`id` IN (1) OR `groups`.`id` IN (2) OR `groups`.`id` IN (3)))

Group.where(:id.in_any => [[1,2,3],[4,5,6],[7,8,9]])
  => undefined method 'visit_Fixnum' for #<MetaWhere::Visitors::Predicate:0x3740ba0>

Group.where(:id.in_any => [["1","2","3"],["4","5","6"],["7","8","9"]])
  => SELECT `groups`.* FROM `groups` WHERE (('1' AND '4' AND '7'))

Group.where(:id.in_any => ["(1,2,3)","(4,5,6)","(7,8,9)"])
  => SELECT `groups`.* FROM `groups` WHERE ((`groups`.`id` IN (0) OR `groups`.`id` IN (0) OR `groups`.`id` IN (0)))

Group.where(:id.in_any => ["1,2,3","4,5,6","7,8,9"])
  => SELECT `groups`.* FROM `groups` WHERE ((`groups`.`id` IN (1) OR `groups`.`id` IN (4) OR `groups`.`id` IN (7)))

我假设他们应该AND或OR一些IN条款，但我无法弄清楚如何正确设置它们，我也没有能够找到任何体面的文件。如果有人有这些预测有用的情况的例子，那也是值得赞赏的。

Answer 1

有时候，直接找到源是有帮助的。看起来有错误：https://twitter.com/#!/erniemiller/status/191151541342830592

MetaWhere in_all和in_any的正确语法和用例

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