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Code Issues Releases Wiki Activity

Fix problem with tiddler titled "undefined"

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Fixes #2507

The problem stems from a JavaScript quirk: the fact that
`({“undefined":"Me"})[undefined]` returns “Me”. The quirk is that the
value `undefined` is coerced into the string “undefined” when used as
an index.

In this particular case, the code for `wiki.getTiddler()` was returning
the tiddler with the title `”undefined”` when called with the title set
to the value `undefined`. It happens that the pluginswitcher called
`wiki.getTiddler(undefined)`.
This commit is contained in:
Jermolene 2016-07-22 11:31:02 +01:00
parent 487d6642e3
commit e282ff1d92
1 changed files with 7 additions and 6 deletions
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13
boot/boot.js
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@ -913,12 +913,13 @@ $tw.Wiki = function(options) {
// Get a tiddler from the store // Get a tiddler from the store
this.getTiddler = function(title) { this.getTiddler = function(title) {
var t = tiddlers[title]; if(title) {
if(t instanceof $tw.Tiddler) { var t = tiddlers[title];
return t; if(t instanceof $tw.Tiddler) {
} else if(title !== undefined && Object.prototype.hasOwnProperty.call(shadowTiddlers,title)) { return t;
return shadowTiddlers[title].tiddler; } else if(title !== undefined && Object.prototype.hasOwnProperty.call(shadowTiddlers,title)) {
} else { return shadowTiddlers[title].tiddler;
}
return undefined; return undefined;
} }
}; };