1 function model.has_rendered_content(class, rendered_class, content_field_name)

2

3 local content_field_name = content_field_name or 'content'

4

5 -- render content to html, save it as rendered_class and return it

6 function class.object:render_content(force_rendering)

7 -- local draft for update

8 local lock = class:new_selector()

9 :add_where{ "id = ?", self.id }

10 :single_object_mode()

11 :for_update()

12 :exec()

13 -- check if there is already a rendered content

14 local rendered = rendered_class:new_selector()

15 :add_where{ class.table .. "_id = ?", self.id }

16 :add_where{ "format = 'html'" }

17 :optional_object_mode()

18 :exec()

19 if rendered then

20 if force_rendering then

21 rendered:destroy()

22 else

23 return rendered

24 end

25 end

26 -- create rendered_class record

27 local rendered = rendered_class:new()

28 rendered[class.table .. "_id"] = self.id

29 rendered.format = "html"

30 rendered.content = format.wiki_text(self[content_field_name], self.formatting_engine)

31 rendered:save()

32 -- and return it

33 return rendered

34 end

35

36 -- returns rendered version for specific format

37 function class.object:get_content(format)

38 -- Fetch rendered_class record for specified format

39 local rendered = rendered_class:new_selector()

40 :add_where{ class.table .. "_id = ?", self.id }

41 :add_where{ "format = ?", format }

42 :optional_object_mode()

43 :exec()

44 -- If this format isn't rendered yet, render it

45 if not rendered then

46 rendered = self:render_content()

47 end

48 -- return rendered content

49 return rendered.content

50 end

51

52 end