RE: How to read and write data to and from a JSON document?

Peter Lewis — Mon, 01 Jun 2020 18:51:32 GMT

Awesome! Let me know if you have any issues, but hopefully it will be straightforward to convert back and forth to JSON when saving to the database 🙂

RE: How to read and write data to and from a JSON document?

Jose H. — Mon, 01 Jun 2020 18:45:43 GMT

Peter, Storing the cdt filter as a json string in the table is best approach here. Converting between the 2 isn't difficult.

RE: How to read and write data to and from a JSON document?

Peter Lewis — Mon, 01 Jun 2020 18:41:58 GMT

You will definitely need a database table to store the saved filter - that's the only way you can save the information for when you come back to it later. You might have seen the recipe here for saving filters to a database table. However, you're also right that it's more complex when saving multiple values. One thing I have done before is to convert the list of values into some kind of list that can be stored in a single field; for example, you could convert the list of values into a semicolon-separated text value when saving to the database. Then, when you retrieve the data back from the database, split the data back into a list using the semicolon separator.

Your idea for using JSON can also work - you could store the JSON string directly as a field in your database table, and then convert the data back to a list in Appian. There is an app in the app market for the Saved Filters Application that does something similar to this.

In general, I'd suggest one of the two options above that use a database table rather than writing to a document directly, because the document will be much more difficult to parse and the database will perform better.