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()

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 return rendered

21 end

22 -- create rendered_class record

23 local rendered = rendered_class:new()

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

25 rendered.format = "html"

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

27 rendered:save()

28 -- and return it

29 return rendered

30 end

31

32 -- returns rendered version for specific format

33 function class.object:get_content(format)

34 -- Fetch rendered_class record for specified format

35 local rendered = rendered_class:new_selector()

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

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

38 :optional_object_mode()

39 :exec()

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

41 if not rendered then

42 rendered = self:render_content()

43 end

44 -- return rendered content

45 return rendered.content

46 end

47

48 end