Module:Check for unknown parameters

கட்டற்ற கலைக்களஞ்சியமான விக்கிப்பீடியாவில் இருந்து.

This module may be appended to a template to check for uses of unknown parameters.


Basic usage[தொகு]

{{#invoke:check for unknown parameters|check
|unknown=[[Category:Some tracking category]]

or to sort the entries in the tracking category by parameter with a preview error message

{{#invoke:check for unknown parameters|check
|unknown=[[Category:Some tracking category|_VALUE_]]
|preview=unknown parameter "_VALUE_"

or for an explicit red error message

{{#invoke:check for unknown parameters|check
|unknown=<span class="error">Sorry, I don't recognize _VALUE_</span>

Here, arg1, arg2, ..., argN, are the known parameters. Any parameter which is used, but not on this list, will cause the module to return whatever is passed with the unknown parameter. The _VALUE_ keyword, if used, will be changed to the name of the parameter. This is useful for either sorting the entries in a tracking category, or for provide more explicit information.

By default, the module makes no distinction between a defined-but-blank parameter and a non-blank parameter. To only track non-blank parameters use |ignoreblank=1.

By default, the module ignores blank positional parameters. To include blank positional parameters in the tracking use |showblankpositional=1.

Include reason[தொகு]

Unless there's a very good reason not to, the parameter |reason should always be supported. This is used as a de facto standard, across all templates, as a way to include an explanatory note (e.g., why the template was placed, in any case in which that isn't obvious) without affecting the displayed output in any way (usually). If you do not include |reason among permissible values, then this module with throw a bogus error when people include a |reason=. A few templates (e.g. {{Rm}}) directly implement a |reason= parameter that actually does something, but it most cases it is a pseudo-parameter that does not actually appear in the template code, and is used in lieu of messy HTML comments.

Lua patterns[தொகு]

This module supports Lua patterns (similar to regular expressions), which are useful when there are many known parameters which use a systematic pattern. For example, template:infobox3cols uses

| regexp1 = header[%d][%d]*
| regexp2 = label[%d][%d]*
| regexp3 = data[%d][%d]*[abc]?
| regexp4 = class[%d][%d]*[abc]?
| regexp5 = rowclass[%d][%d]*
| regexp6 = rowstyle[%d][%d]*
| regexp7 = rowcellstyle[%d][%d]*

to match all parameters of the form headerNUM, labelNUM, dataNUM, dataNUMa, dataNUMb, dataNUMc, ..., rowcellstyleNUM, where NUM is a string of digits.


| above = {{{name|}}}

| label1 = Height
| data1 = {{{height|}}}

| label2 = Weight
| data2 = {{{weight|}}}

| label3 = Website
| data3 = {{{website|}}}
  end infobox, start tracking
-->{{#invoke:Check for unknown parameters|check
| unknown = [[Category:Some tracking category|_VALUE_]]
| preview = unknown parameter "_VALUE_"
| name
| height | weight
| website

Templates invoking this module[தொகு]

The following is a list of some of the templates which invoke this module, with the associated category for each.

For a more up-to-date list, search for the "check for unknown parameters" within the template namespace.

See also[தொகு]

  • module:TemplatePar (originally from dewiki)
  • Template:Parameters and Module:Parameters – generates a list of parameter names for a given template
  • he:Module:ParamValidator - parameter validation system on hewiki, relies on TemplateData. some of the things checked are:
    • use of undeclared parameters, parameters marked in templatedata "deprecated"
    • mistyped (mainly, params declared in templatedata as "number" receiving non-numerical value)
    • missing parameters marked in TemplateData as "required"
    • understands aliases, and warns when more than one alias of a parameter is used
    • quite a lot more

-- This module may be used to compare the arguments passed to the parent
-- with a list of arguments, returning a specified result if an argument is
-- not on the list
local p = {}

local function trim(s)
	return s:match('^%s*(.-)%s*$')

local function isnotempty(s)
	return s and s:match('%S')

local function clean(text)
	-- Return text cleaned for display and truncated if too long.
	-- Strip markers are replaced with dummy text representing the original wikitext.
	local pos, truncated
	local function truncate(text)
		if truncated then
			return ''
		if mw.ustring.len(text) > 25 then
			truncated = true
			text = mw.ustring.sub(text, 1, 25) .. '...'
		return mw.text.nowiki(text)
	local parts = {}
	for before, tag, remainder in text:gmatch('([^\127]*)\127[^\127]*%-(%l+)%-[^\127]*\127()') do
		pos = remainder
		table.insert(parts, truncate(before) .. '&lt;' .. tag .. '&gt;...&lt;/' .. tag .. '&gt;')
	table.insert(parts, truncate(text:sub(pos or 1)))
	return table.concat(parts)

function p._check(args, pargs)
	if type(args) ~= "table" or type(pargs) ~= "table" then
		-- TODO: error handling

	-- create the list of known args, regular expressions, and the return string
	local knownargs = {}
	local regexps = {}
	for k, v in pairs(args) do
		if type(k) == 'number' then
			v = trim(v)
			knownargs[v] = 1
		elseif k:find('^regexp[1-9][0-9]*$') then
			table.insert(regexps, '^' .. v .. '$')

	-- loop over the parent args, and make sure they are on the list
	local ignoreblank = isnotempty(args['ignoreblank'])
	local showblankpos = isnotempty(args['showblankpositional'])
	local values = {}
	for k, v in pairs(pargs) do
		if type(k) == 'string' and knownargs[k] == nil then
			local knownflag = false
			for _, regexp in ipairs(regexps) do
				if mw.ustring.match(k, regexp) then
					knownflag = true
			if not knownflag and ( not ignoreblank or isnotempty(v) )  then
				table.insert(values, clean(k))
		elseif type(k) == 'number' and knownargs[tostring(k)] == nil then
			local knownflag = false
			for _, regexp in ipairs(regexps) do
				if mw.ustring.match(tostring(k), regexp) then
					knownflag = true
			if not knownflag and ( showblankpos or isnotempty(v) ) then
				table.insert(values, k .. ' = ' .. clean(v))

	-- add results to the output tables
	local res = {}
	if #values > 0 then
		local unknown_text = args['unknown'] or 'Found _VALUE_, '

		if mw.getCurrentFrame():preprocess( "{{REVISIONID}}" ) == "" then
			local preview_text = args['preview']
			if isnotempty(preview_text) then
				preview_text = require('Module:If preview')._warning({preview_text})
			elseif preview == nil then
				preview_text = unknown_text
			unknown_text = preview_text
		for _, v in pairs(values) do
			-- Fix odd bug for | = which gets stripped to the empty string and
			-- breaks category links
			if v == '' then v = ' ' end

			-- avoid error with v = 'example%2' ("invalid capture index")
			local r = unknown_text:gsub('_VALUE_', {_VALUE_ = v})
			table.insert(res, r)

	return table.concat(res)

function p.check(frame)
	local args = frame.args
	local pargs = frame:getParent().args
	return p._check(args, pargs)

return p
"" இருந்து மீள்விக்கப்பட்டது