Making the Project field in the Account Child table mandatory based on the parent 'Company' field on the New Journal Entry account

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Making the Project field in the Account Child table mandatory based on the parent ‘Company’ field on the New Journal Entry account

I can do it based on a field in the same table, but how do I reference the ‘Project’ field from the parent ‘journal entry’ table? What would that look like?
I tried a couple of hit and trial names such as ‘JournalEntry.company’, but that didn’t work.

Any help would be great.

Thanks!

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customize form, mandatory depends on for project field

eval:parent.comany=='yourcompany'

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I tried that. But how do I find out the ‘parent’ table name? I tried ‘journalentry.company’ and journal_entry.company, but that didn’t work. Or should I just type in the word ‘parent’?

I tried this: eval:parent.finance_book==‘BEE Ledger’
didn’t work.

Thanks!