CODEWITHSUNDEEP
javascriptjsonnode.js
Ben
Ben

Reputation: 6086

Node.js - using JSON objects as variables

As part of a test scenario, I would like to use some large JSON objects. I would like to store these in a separate directory, and then import each object as I need them.

Currently I am using the following method:

var t1 = require('./sample_data/t1.json')

var t2 = require('./sample_data/t2.json')

however am seeing out of date data, im guessing due to require cache.

I have tried exporting each object, however I then get a wrapper object around the JSON I require that breaks my tests

Can anyone advise? Is there a better way to do this?

Regards, Ben.

UPDATE: My issue is that I see cached results as I tweak the stored JSON

Upvotes: 2

Views: 1753

Answers (2)

Damiaan Dufaux
Damiaan Dufaux

Reputation: 4795

I dont know if its a better way but you can also do it using the File System module like this: 

fs.readFile('./sample_data/t1.json', function (err, data) {
  if (err) throw err;
  t1 = JSON.parse(data);
});

update:

Like Nirk said, there is a synchronous version of fs.readFile. If you want to use that version, your code should look like:

t1 = JSON.parse(fs.readFileSync('./sample_data/t1.json'));

Upvotes: 4

SLaks
SLaks

Reputation: 888185

Your suspicion is correct.

require() caches modules; it will only read each file from disk once.

You can break this cache like this:

delete require.cache[require.resolve('...')];

Alternatively, you can read the file yourself using the fs module, then call JSON.parse().
Make sure to correctly pass a relative or absolute path (you may want to call require.resolve()).

Upvotes: 2

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