[Zope3-dev] Re: Bytes versus ASCII

[Tres Seaver]

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Christian Theune wrote:
> Hi,
> 
> (this is about zope.schema)
> 
> I assumed that the fields Bytes and ASCII have some distinction. The
> ASCII field explicitly checks for every character to have an ordinal
> value lower than 127.
> 
> Bytes however does a cast in fromUnicode(u) that does str(u). This will
> break if there are non-ascii characters in the unicode string.
> Effectively this makes it an ASCII field as well.
> 
> However, I don't know enough about the environment, so eventually this
> is all good. When does the fromUnicode method get called? Everytime I
> use this field through zope.app.form or zope.formlib?

'Bytes' should mean "arbitrarily-encoded string", where the application
is responsible for encoding / decoding the value.  Its primary use is to
store file uploads, AFAIK.


Tres.
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Tres Seaver          +1 202-558-7113          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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