exception when trying to access a value of "null"

[thorstenKoch]

Error Case:

In a cell i have a value, which is null. This will break the download() with the following error:

Subscriber.js:242 Uncaught TypeError: Cannot read property 'indexOf' of null at Ng2CsvService.webpackJsonp.1016.Ng2CsvService.escapeRowValue (Ng2Csv.service.js:51) at Ng2Csv.service.js:42 at Array.map (<anonymous>) at Ng2CsvService.webpackJsonp.1016.Ng2CsvService.convertToCsv (Ng2Csv.service.js:42) at Ng2CsvService.webpackJsonp.1016.Ng2CsvService.download (Ng2Csv.service.js:18) at BatchComponent.webpackJsonp.1146.BatchComponent.startDownload (batch.component.ts:169) at BatchComponent.webpackJsonp.1146.BatchComponent.downloadSelected (batch.component.ts:138) at Object.eval [as handleEvent] (BatchComponent.html:113) at handleEvent (core.es5.js:11998) at callWithDebugContext (core.es5.js:13467)

Expected Behaviour:

I would expect that null values will be like an empty string in a cell, displays nothing.

[rars]

Thanks for raising this issue. I suspect you're using the OrderedProjectionCsvRowMapper as I don't think this issue is present when using AutoCsvRowMapper. The reason being that AutoCsvRowMapper always returns a non-null and non-undefined string. To avoid this I think you could have specified in your mapping something like ['MyColumn', x => x.columnValue || ''] but I think it's sensible to make a change to the library to allow this behaviour to be configured.

I've release 0.4.0 where by default null and undefined values will be written out as empty strings. For example, it will appear as an empty column value columnOneValue,,columnThreeValue in the CSV. You can change the value to something else, e.g. config.outputValueForNull = 'NULL'; would lead to output like columnOneValue,NULL,columnTwoValue.

Thanks again. Let me know if you have any issues with the above.

[thorstenKoch]

So sorry for late response (projects wasn't updated since then): I updated and removed my helper method.
Looks like this is fixed. Thank you very much!