Pagination in search (count and sorting)

[msalvadores]

Offset limit and some kind of ordering when retrieving Goo objects.

Project.all(:limit=> 10, :offset => 100, :sort => { :with => [:name, :asc] )
Project.find(:attribute => "value" :limit=> 10, :offset => 100, :sort => { :with => [:name, :asc] )
Project.count({})

This should be done accordingly to the issue about changing the API for search

[palexander]

ActiveModel has a decent api for this:

User.find_each(:start => 2000, :batch_size => 5000) do |user|
  # do something with `user`
end

[palexander]

There's a good one for iterating over arrays of responses too:

# Give add_invoices an array of 1000 invoices at a time
Invoice.find_in_batches(:include => :invoice_lines) do |invoices|
  # invoices is an array with 1000 invoice objects
  export.add_invoices(invoices)
end

[msalvadores]

:+1: I like it.

@palexander how Active Model does to know the number of pages in find_in_batches ?

[palexander]

It doesn't know the number of pages, you just keep iterating until all records are found. I guess this isn't really pagination, more a convenient way to work with groups of results when getting back Invoice.all would be too much data.

Here's more info: http://apidock.com/rails/ActiveRecord/Batches/ClassMethods/find_in_batches

[msalvadores]

As discussed we do not worry about this now. We only need pagination for mappings and classes (in the ontology linked data API). It can wait.