(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 this be better?
Anyway, I catenate the results,
@dicts=the_other_dicts_of_same_user(d)+public_dicts_of_other_users(d)
which yields again a Dict::ActiveRecord_Relation . Now I apply
pagination:
@[email protected](....)
This yields the error message, that paginate is not defined for objects
of type Array.
I was able to get around this error, by doing a
require 'will_paginate/array'
as a first line in my controller, but I wonder: Why do I get this error?
@dicts is NOT an array (I logged @dicts.class.to_s to be sure of this),
and I would have expected to work it in a ActiveRecord_Relation.
Could someone please kindly explain this observed behaviour to me?
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