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This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.

This module allows you to compare a template parameter to a property in Wikidata.

You can call it with: {{WikidataCheck|property=P###|value={{{value|}}}|category=Category prefix|namespaces=0,14}}

|property= is the P### of the property. The "P" must be uppercase.
|value= is the value to use from the template. This would be something like {{{id|}}}
|category= is the prefix to use in front of the category names. The categories created are "[prefix] not in Wikidata", "[prefix] same as Wikidata", and "[prefix] different from Wikidata".
- It is recommended you create these categories with {{hiddencat}} before applying this template.
|namespaces= is a comma separated list of the numerical namespaces to apply the template in. The default is 0, which is just article space.

Example

For en:template:MusicBrainz artist, the following is the code to add:

{{WikidataCheck|property=P343|value={{{mbid|{{{id|{{{1|}}}}}}}}}|category=MusicBrainz artist id|namespaces=0}}

Code

local p = {}

function p.wikidatacheck(frame)
    local pframe = frame:getParent()
    local config = frame.args -- the arguments passed BY the template, in the wikitext of the template itself
    local args = pframe.args -- the arguments passed TO the template, in the wikitext that transcludes the template
    
    local property = config.property
    local value = config.value or ""
    local prefix = config.prefix or ""
    local catbase = config.category
    local namespaces = config.namespaces
    local ok = false -- one-way flag to check if we're in a good namespace
    local ns = mw.title.getCurrentTitle().namespace
    for v in mw.text.gsplit( namespaces, ",", true) do
        if tonumber(v) == ns then
            ok = true
        end
    end
    if not ok then -- not in one of the approved namespaces
        return ""
    end
    local entity = mw.wikibase.getEntityObject()
    if not entity then -- no Wikidata item
        return "[[Category:" .. catbase .. " without linked Wikidata]]"
    end
    if value == "" then
        return nil -- Using Wikidata
    end
    local claims = entity.claims or {}
    local hasProp = claims[property]
    if not hasProp then -- no claim of that property
        return "[[Category:" .. catbase .. " not in Wikidata]]" -- bad. Bot needs to add the property
    end
    compare_value = prefix .. value
    for i, v in ipairs(hasProp) do -- Now we try to iterate over all possible values?
        if v.mainsnak.snaktype == 'value' then
            propValue = (v.mainsnak.datavalue or {}).value
            if propValue == compare_value then
                return "[[Category:" .. catbase .. " same as Wikidata]]" -- yay!
            end
        end
    end
    return "[[Category:" .. catbase .. " different from Wikidata]]" -- needs human review :(
end

return p

Wikimore

Module:WikidataCheck

Code