[英]Update on record would update all other records in model, global ordering in rails 3.1
I would like to update all records in a rails (3.1) model when i update an attribute on a single record. 当我更新单个记录上的属性时,我想更新Rails(3.1)模型中的所有记录。
Like self.update_attribute(:global_order => 1) then before or after save a would like to update all other records to update thier global_order (1, 2, 3, 4). 就像self.update_attribute(:global_order => 1)一样,保存之前或之后想要更新所有其他记录以更新global_order(1、2、3、4)。
Right now with on after_save callback I get caught in a recursive loop, is skip callbacks the way to go? 现在,在after_save回调中,我陷入了递归循环中,跳过回调是路要走吗? I would like the app to throw exceptions if anything seems strange in global_order.
如果global_order中出现任何异常,我希望该应用程序引发异常。
Or are there any 3.1 gems that would solve my issue. 还是有任何3.1宝石可以解决我的问题。
after_save :set_global_order
def set_global_order
@products = self.class.all(:order => :global_order)
@products.sort! {|a,b| a.global_order <=> b.global_order}
@products.reverse!
@products.each_with_index do |p, index|
p.update_attributes!({:global_order => index + 1})
end
end
Not sure if there's a gem, but you could definitely refactor this with the following considerations: 不确定是否有宝石,但是您绝对可以通过以下考虑因素进行重构:
... ...
def set_global_order
products = self.class.order('global_order DESC')
products.each_with_index do |p, index|
p.update_column(:global_order, index + 1)
end
end
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