[web2py] Limiting database entries

[mostwanted]

Is there a way to limit the number of entries to a database?
Like limiting the number of entries to only 100 and nothing more.

Regards;

Mostwanted 

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[web2py] Limiting Database Entries in Table

[Douglas McCormick Jr.]

Hi Everyone,

Before I begin: I love this framework-- I can't believe I haven't been 
using this forever.

Could someone help me limit the entries/rows within a web2py database 
table?  Presumably, I'd like to have a form page (to initially insert the 
data) in order to allow for the first entry into the table.  Then 
subsequent form submissions (aka in the future when I re-submit or change 
values again) I would only update the 1st row; it would never allow to add 
new rows into the database. 

What I'm intending to create is a "settings" table that can only have 1 
row/entry.  Each column in the "settings" table will be used/called 
elsewhere with other ".py" scripts

Thanks for your help,
-Doug Jr.

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