Now it makes much more sense for me, i'm coming from PHP programming!!! Thanks.
Il giorno venerdì 3 luglio 2015 23:38:00 UTC+2, Anthony ha scritto: > > A lambda function is just an anonymous function (i.e., one you define in > place without naming it). The common_filter does not have to be a lambda > function -- it can be any callable object that takes a single argument and > returns a Query object. So, you could do: > > def my_common_filter(query): > return db.blog_post.is_public == True > db.blog_post._common_filter = my_common_filter > > When the common filter function is called, the current query will be > passed to it. In the above example, that query argument is ignored, but in > theory, you could inspect that query argument and have the return value > depend on it somehow. The final query will end up being a conjunction of > the original query and the return value of the common filter function. > > Also, note that the argument of the common filter function (whether a > lambda function or otherwise) does not have to be "query" -- that is just a > convention to remind you that the original query will be passed into the > function. You can name that argument whatever you want. > > Anthony > > On Friday, July 3, 2015 at 12:00:22 PM UTC-4, Paolo Amboni wrote: >> >> Can someone translate the expression >> >> db.blog_post._common_filter = *lambda query:* db.blog_post.is_public == >> True >> >> *without the use of lambda function?* >> >> I'm trying to understand how to set up common filter in controller but >> lambda function always confuse me. >> >> *So, for now, the only way to set the filter is to copy the code without >> understanding it!!* >> > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
