8/15/2023 0 Comments Elasticsearch export all dataThe as_path method receives a JSON path string an creates an object which you can use to manipulate data on that path. Add these lines instead of the # do some magic part: We can use this skeleton builder to implement our ROT13 algorithm. The builder is nothing more than a closure that reads the data, does some action on the data and return the data.We import Catmandu::Fix::Builder to use the new Catmandu 1.20 builder class provides a _build_fixermethod.We import Catmandu::Fix::Has to be able to use has path constructs to read in arguments for our Fix.We import the as_path method be able to easily access data on JSON paths/.This Fix is only the skeleton which doesn’t do anything. In the code above we start implementing a rot13(path) Fix that should read a string on a JSON path and encrypt it using the ROT13 algorithm. Let me give an simple example of a skeleton Fix that does nothing: In Catmandu 1.20 there is now support for a third and easy way to create new Fixes using the Catmandu::Fix::Builder and Catmandu::Fix::Path class. But, to create Fix packages was pretty complex. Using emit functions it was easier to get fast access to deeply nested data. These were functions that generate Perl code on the fly. Create a Perl package in the Catmandu::Fix namespace which implemented emit functions.Then disadvantage was that accessing fields in a deeply nested record was tricky and slow to code. This was very easy: update the $data hash you got as first argument, return the updated $data and you were done. Create a Perl package in the Catmandu::Fix namespace which implements a fix method.In the previous versions of Catmandu there were only two options to create new fixes: This coding by Nicolas will make it much easier and straightforward to implement any kind of fixes in Perl. The main addition is a brand new way how Catmandu Fix-es can be implemented using the new Catmandu::Path implementation. On May 21th 2019, Nicolas Steenlant (our main developer and guru of Catmandu) released version 1.20 of our Catmandu toolkit with some very interesting new features.
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