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# frozen_string_literal: true
module API
# Concern for declare pagination params.
#
# @example
# class CustomApiResource < Grape::API::Instance
# include PaginationParams
#
# params do
# use :pagination
# end
# end
module PaginationParams
extend ActiveSupport::Concern
included do
helpers do
params :pagination do
optional :page, type: Integer, default: 1, desc: 'Current page number', documentation: { example: 1 }
optional :per_page, type: Integer, default: 20,
desc: 'Number of items per page', except_values: [0], documentation: { example: 20 }
end
def verify_pagination_params!
return if Feature.disabled?(:only_positive_pagination_values)
page = begin
Integer(params[:page])
rescue ArgumentError, TypeError
nil
end
return render_structured_api_error!({ error: 'page does not have a valid value' }, 400) if page&.< 1
per_page = begin
Integer(params[:per_page])
rescue ArgumentError, TypeError
nil
end
return render_structured_api_error!({ error: 'per_page does not have a valid value' }, 400) if per_page&.< 1
end
end
end
end
end
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