Hello,

Does anyone know how to rewrite this two contoller line? After model and 
view, I am trying to get familiar with controller and I am finding when a 
code is summarized, its hard to understand at times. Wondering if someone 
can break it down for me a little?
first def:

(1) categories = db(db.category).select(orderby=db.category.name)

why two dbs? can we rewrite this without the select? Is select is a web2py 
key word? I come from a MATLAB world where we define the structure first 
and then use. I don't recall I defined select to be a struct.

(2) similarly on my second def:

category = db.category(request.args(0))

Now, I only see one db instead of two. Why? I understand the request args 
means where I click. Which argument is it.

also this line,

news = db(db.news.category == category.id).select(orderby=db.news.vote)

Its hard to understand when lot of arguments are combined into one. Anyone 
can help break it down for me a little? Any idea about how to rewrite that, 
may be even using "if"statement without structure if possible?





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