equality for Arel::Nodes #130

rapimo opened this Issue Aug 2, 2012 · 1 comment


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rapimo commented Aug 2, 2012

when chaining custom selects in rails like


It produces duplicate select_values. Thats because the select_values array can't be made uniq in



table[:name] == table[:name]
=> true

table[:name].as('foo') == table[:name].as('foo')
=> false

Wouldn't it make sense to implement equality for Arel::Nodes ?
Or to be more specific to have a proper implementation of the hash function for Arel::Nodes ?


ernie commented Aug 6, 2012

I'm 👍 on this, as well as equality for Arel::Attributes::Attribute etc. Ran into this on ernie/squeel#153 recently. Given how much ActiveRecord relies on the concept of being able to uniq a collection for *_values, we should do what we can to help it along.

Happy to put in the work on this, unless another committer has opposition.

@ernie ernie closed this in 6e638bb Aug 19, 2012

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