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Document case of mixed up ctx in middleware chains

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josieusa 2017-02-23 10:02:23 +01:00
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@ -8,10 +8,18 @@ Current context for LoopBack applications, based on cls-hooked.
### Known issues
- [when](https://www.npmjs.com/package/when), a popular Promise
- [when](https://www.npmjs.com/package/when), a popular Promise
implementation, breaks context propagation. Please consider using the
built-in `Promise` implementation provided by Node.js or
[Bluebird](https://www.npmjs.com/package/bluebird) instead.
- Express middleware chains which contain a "bad" middleware (i.e. one which
breaks context propagation inside its function body, in a way mentioned in
this doc) called before other "good" ones, need to be refactored. The
following lines need to be present at the beginning of the middleware body. At
least the "bad" one; but, as a preventive measure, they can be present in
every other middleware of every chain as well:
var ctx = LoopBackContext.getCurrentContext({bind: true});
next = ctx.bind(next);
Discussion: https://github.com/strongloop/loopback-context/issues/17