RE: DropDown population from DB COlumn

bryant.st39 — Sun, 19 Jan 2020 11:59:23 GMT

Another option is to check to see if the value is active in the reference table or not. If it is not present in the reference table, display a null value and force the user to update the value to one of the active values. Look at using the contains function to check to see if the value is in the list of active values.

RE: DropDown population from DB COlumn

salim.galfane — Sat, 18 Jan 2020 10:09:07 GMT

Hi,

This is typical issue when managing references data. Here are 2 options you could consider to solve this issue /

1. Do not allow user to delete values that are used. You can define an expression rule to check if the value is used , and then suggest the user to remove or update this value from the existing data. This is not the best approach but at least you won t get this error.

2. As you mention, the dropdown will always have only active values, therefore if you try to display an existing object with the deleted value, you will have this error. Best way I found to avaid this is to create a custom dropdown which will always add the passed value in the list of dropdown if it s not present.

Lest say you have you drop down contains these values a, b, c, d

You then delete d, for existing data with values in a, b and c, the dropdown will always have the value, so you custom dropdown will not change the list, only active values will be used.

But for existing data with value d, your custom dropdown will retrieve active values a,b, c from database and then add also d, so that the interface will showup and give the user the ability to change this value if needed or just update another value.

Hope this help