1

I've been exploring the capabilities of MetaWhere over the last couple of days. Most of the predications are pretty straightforward, but I'm stuck on how to use in_all and in_any.

Here are some of my attempts: 

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)))

I'm assuming they're supposed to AND or OR a bunch of IN clauses, but I can't figure out how to set them up properly, nor have I been able to find any decent documentation. And if anyone has any examples of situations where these predications would be useful, that would be appreciated as well.

4

1 回答 1

0

Sometimes, it helps to go straight to the source. Looks like there's bug: https://twitter.com/#!/erniemiller/status/191151541342830592

于 2012-04-14T14:51:08.057 回答