Lua

There are 2 ways to use Lua.

1) perform the query directly from Lua, as follows:

local p = {}

function p.main(frame)
  -- local args = frame:getParent().args

  -- the VisualData query is called from here
  local ret = mw.visualdata.query( 'Book', '[[title::+]]', {'title'}, {} )

  return mw.text.jsonEncode(ret)
end

return p

Template: Template:Test Lua

Module: Module:TestLua

[{"pageid":419,"title":"Demo VisualData","data":{"authors":[{"first_name":"Herbert ","last_name":"Wells","name":"Herbert Wells","email":""},{"first_name":"George","last_name":"Wells","name":"George Wells"}],"title":"The first men in the moon","cover":"File:First_Men_in_the_Moon_(1901)_frontispiece.jpg"}},{"pageid":1806,"title":"Test Book","data":{"authors":[{"first_name":"Test","last_name":"Author","name":"Test Author","email":""}],"title":"Test Book","cover":"File:"}}]

2) perform the query on a wiki article and then process the result using Lua

{{#visualdataquery: [[title::+]]
|schema=Book
|?cover
|?title
|?authors/name
|?authors/email
|format=lua
|module=Handle query
}}

"module" must be a template

local p = {}

function p.main(frame)
  -- local args = frame:getParent().args
  local origArgs = (type(frame.getParent) == "function") and frame:getParent().args or frame
  local success, json = pcall(mw.text.jsonDecode, origArgs[0])

  -- do more processing here
  local ret = json

  return mw.text.jsonEncode(ret)
end


return p

Template: Template:Handle query

Module: Module:Handle query

See also

• Demo VisualData 1.0
• New task
• Page upload
• CRUD
• Result formats
• Dependent values
• Geolocation
• Queries
• Query cities (join queries)
• Dynamic catalogue
• Datatable cards
• Calendar
• Carousel
• Nested schemas
• Table mode
• Lua
• Official docs

support & questions: support at topway.it

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