Patch last record on CDS

[mark6]

Hi, my question is very simple, but I could not find anything helpful. I would like to patch the last record that has a blank field in my CDS entity. The scenario is this: I have several records with the same value in a field (let's say fieldA) and I want to write to an another field (fieldB) only on the most recent one. Consider that the field I mentioned are all the equals, what changes is the creation date. How can I achieve that? The Last function is not delegable, so it doesn't always do what I want (almost never). 

[yashag2255]

Hi @mark6 

You can try using the formula:

Patch(DataSource, First(Sort(Filter(DataSource, Field1 = "<<ValueToMatch>>"),'Modified On',Descending)),{Field2:"<<valueToUpdate>>"})

Here, please replace DataSource with your actual Data Source name and you can get the last updated record, using OOTB attibute "Modified On".

Hope this Helps!

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[mark6]

Hi  yashag2255,

thanks for your answer. I tried your formula but the behaviour is always the same. The strange thing is that on my computer it does work, but when I execute on my device (Samsung tablet) it doesn't work. In particular it patches another record, the first one, not the latest. I cannot figurate why. I inserted a Refresh(entity) before the operation but the problem still remains. Any other suggestion?