Vladimir Shabanov wrote:
2010/8/24 Adam Chlipala<[email protected]>:
Vladimir Shabanov wrote:
Ur/Web can throw error on invalid DML (for example "ERROR: duplicate
key value violates unique constraint ..."). Currently this error
results in invalid page.
Is there a way to handle such errors?
No, there is no support for that right now. Do you have a suggestion of
what support you would like to see?
There are several ways to add exceptions.
This is certainly a thorough list of ways of supporting general
exception-handling, but I had hoped (and continue to hope) Ur wouldn't
need any such facility. ;)
Why can't you just check for uniqueness constraint violations in your
code before inserting into the database? I can see the case for a
simple facility for specifying an alternate error-reporting page, but
more than that doesn't seem worthwhile. These errors should only come
up in buggy programs.
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