Triggers do the error checking

Hi,

i am new to the concepts of SQL and Postgresql.
i am just thinking about some database design decisions.

at this time my tabel has many trigger functions to check the inserted or 
updated values. 

Some checks could be done via a check constraint, but i wont get individual 
error-messages. With triggers i can raise exceptions in a different language 
which my php frontend can show to the user.

So the whole error checking is done inside the database with triggers.

Is this ok? or is it a bad design decision. I dont want my frontend(gui, php 
site) to do the error checking because i dont want to write things a thousand 
times.

janning



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