Module:Is located in
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![]() | This module is rated as beta, and is ready for widespread use. It is still new and should be used with some caution to ensure the results are as expected. |
Usage
[edit]{{#invoke:Is located in|main|qid=|value=}}
This module will use Wikidata property located in the administrative territorial entity (P131) to determine whether or not an entity is located in a particular area or not.
Example
[edit]For example:
- Kassa Dam (Q6374700)
- is located in Yuzawa (Q1204269), which
- is located in Minamiuonuma district (Q798772), which
- is located in Niigata Prefecture (Q132705).
- is located in Minamiuonuma district (Q798772), which
- is located in Yuzawa (Q1204269), which
To know that Kassa Dam (Q6374700) is located in Niigata Prefecture (Q132705), you can use:
{{#invoke:Is located in|main|qid=Q6374700|value=Q132705}}
= 3
The output number indicates the minimum recursion depth to find the value required. An output of zero indicates that the item is not located there.
Maximum depth
[edit]For performance considerations, the module will not go on searching indefinitely. The default maximum recursion depth is 5. If you want to change this, use the |maxdepth=
parameter.
local p = {};
local function checklayer(depth) -- check P131 of items at current depth
checklist[depth+1] = {} -- setup next layer of table
local j = 0
for j = 1,#checklist[depth] do -- loop over items at current depth
local subclasses = mw.wikibase.getBestStatements(checklist[depth][j],"P131") -- get P131 statements
for i,statement in ipairs(subclasses) do -- loop through items at next depth
if statement.mainsnak.snaktype == 'value' then
local newitem = statement.mainsnak.datavalue.value.id
if newitem == value then
isLocated = true
else
checklist[depth+1][#checklist[depth+1]+1] = newitem -- add item to next depth of checklist table
end
end
end
end
return isLocated
end
function p.main(frame)
local args = frame.args
local pargs = frame:getParent().args
value = args.value or pargs.value
local qid = args.qid or pargs.qid or ""
if qid == "" then
qid = mw.wikibase.getEntityIdForCurrentPage()
end
if not qid then
return 0
end
checklist = {{qid}}
local md = args.maxdepth or pargs.maxdepth
if md then
maxdepth = tonumber(md)
else
maxdepth = 5
end
depth = 0 -- current depth
isLocated = false -- assume false until match found
while not isLocated and depth<maxdepth do
depth = depth+1
checklayer(depth)
end
if not isLocated then
depth = 0 -- indicates not isLocated
end
return depth -- return depth that item was found
end
return p