Commit 0678b8a4 authored by Nihad Abbasov's avatar Nihad Abbasov

add 'Link' header for API response

parent ff7073ac
......@@ -51,8 +51,12 @@ module API
end
end
def paginate(object)
object.page(params[:page]).per(params[:per_page].to_i)
def paginate(relation)
per_page = params[:per_page].to_i
paginated = relation.page(params[:page]).per(per_page)
add_pagination_headers(paginated, per_page)
paginated
end
def authenticate!
......@@ -129,6 +133,18 @@ module API
private
def add_pagination_headers(paginated, per_page)
request_url = request.url.split('?').first
links = []
links << %(<#{request_url}?page=#{paginated.current_page - 1}&per_page=#{per_page}>; rel="prev") unless paginated.first_page?
links << %(<#{request_url}?page=#{paginated.current_page + 1}&per_page=#{per_page}>; rel="next") unless paginated.last_page?
links << %(<#{request_url}?page=1&per_page=#{per_page}>; rel="first")
links << %(<#{request_url}?page=#{paginated.total_pages}&per_page=#{per_page}>; rel="last")
header 'Link', links.join(', ')
end
def abilities
@abilities ||= begin
abilities = Six.new
......
......@@ -25,6 +25,12 @@ describe API::API do
json_response.should be_an Array
json_response.first['title'].should == issue.title
end
it "should add pagination headers" do
get api("/issues?per_page=3", user)
response.headers['Link'].should ==
'<http://www.example.com/api/v3/issues?page=1&per_page=3>; rel="first", <http://www.example.com/api/v3/issues?page=1&per_page=3>; rel="last"'
end
end
end
......
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