Thanks Max, you don't have to both open an 
issue https://github.com/rails/rails/issues/38777 and start a thread on 
here.

This is in master, scheduled for Rails 6.1, currently.

fredag den 20. marts 2020 kl. 20.00.51 UTC+1 skrev Max Calabrese:
>
> When you use Ruby 2.7.0's new beginless range feature in a hash argument 
> to `.where` the results it does not match the behavior of using 
> `Float::INFINITY..n`.
>
> irb(main):030:0> Post.where(id: Float::INFINITY..3)
>   Post Load (0.4ms)  SELECT "posts".* FROM "posts" WHERE "posts"."id" <= 
> $1 LIMIT $2  [["id", 3], ["LIMIT", 11]]
>
>
> irb(main):031:0> Post.where(id: ..3)
>   Post Load (0.4ms)  SELECT "posts".* FROM "posts" WHERE "posts"."id" 
> BETWEEN $1 AND $2 LIMIT $3  [["id", nil], ["id", 3], ["LIMIT", 11]]
> => #<ActiveRecord::Relation []>
>
>
> Neither does it match the behavior of endless ranges which where 
> introduced in 2.6.0.
>
>
> irb(main):032:0> Post.where(id: 3..)
>   Post Load (0.3ms)  SELECT "posts".* FROM "posts" WHERE "posts"."id" >= 
> $1 LIMIT $2  [["id", 3], ["LIMIT", 11]]
> => #<ActiveRecord::Relation []>
>
>
> On a beginless range begin is nil, on endless end is nil.
>
> I'm trying to look into this and what could actually be done about it. I'm 
> a bit puzzled at why the endless range works as RangeHandler just lops off 
> the begin and end and passes it to:  
>
> predicate_builder.build_bind_attribute
>
> Which checks if the value is infinite.
>
> Where along in the chain of RangeHandler -> QueryAttribute -> 
> ActiveModel::Attribute should this be handled? 
>

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