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# See Pagy::Backend API documentation: https://ddnexus.github.io/pagy/docs/api/backend
# frozen_string_literal: true
class Pagy
# Define a few generic methods to paginate a collection out of the box,
# or any collection by overriding pagy_get_items and/or pagy_get_vars in your controller
# See also the extras if you need specialized methods to paginate Arrays or other collections
module Backend
private
# Return Pagy object and paginated results
def pagy(collection, **vars)
vars[:count] ||= pagy_get_count(collection, vars)
vars[:limit] ||= pagy_get_limit(vars)
vars[:page] ||= pagy_get_page(vars)
pagy = Pagy.new(**vars)
[pagy, pagy_get_items(collection, pagy)]
end
# Get the count from the collection
def pagy_get_count(collection, vars)
count_args = vars[:count_args] || DEFAULT[:count_args]
(count = collection.count(*count_args)).is_a?(Hash) ? count.size : count
end
# Sub-method called only by #pagy: here for easy customization of fetching by overriding
# You may need to override this method for collections without offset|limit
def pagy_get_items(collection, pagy)
collection.offset(pagy.offset).limit(pagy.limit)
end
# Override for limit extra
def pagy_get_limit(_vars)
DEFAULT[:limit]
end
# Get the page integer from the params
# Overridable by the jsonapi extra
def pagy_get_page(vars, force_integer: true)
page = params[vars[:page_param] || DEFAULT[:page_param]]
force_integer ? (page || 1).to_i : page
end
end
end
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14 entries across 14 versions & 1 rubygems