On 16 August 2014 11:03, Ronald Fischer <[email protected]> wrote:
> (Rails 4, Ruby 2)
>
> I have two functions which query the database. Both yield a set of model
> objects. These two sets should be catenated and presented to the user
> using the will_paginate Gem. I think I understand now how to do it, but
> a few issues with this are still puzzling me.
>
> Here are the query functions:
>
>   def the_other_dicts_of_same_user(d)
>     User.find_by_id(d.user_id).dicts.where("id != #{d.id}")
>   end
>
>   def public_dicts_of_other_users(d)
>     Dict.where("user_id != #{d.user_id} and world_readable")
>   end
>
> Both yield a series of Dict objects. The result of the first query is of
> type Dict::ActiveRecord_AssociationRelation and the result of the second
> query is of type Dict::ActiveRecord_Relation
>
> I guess I get different data types here, because I start with User in
> the first case and with Dict in the second case.
>
> As a side note: I *could* have written the first query alternatively as
>
>    Dict.where("user_id = #{d.user_id} and id != #{d.user_id}")

Would it be possible to combine the two queries into one - Dict.where(
...  or ... )?  Then you would not need to concatenate them.

Colin

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