By Adrian Holovaty, Jacob Kaplan-Moss (auth.)
Django, the Python-based comparable to Ruby’s Rails net improvement framework, is among the preferred themes in internet improvement this present day. Its author (and co-author of this ebook) Adrian Holovaty has develop into a big name of types end result of the compelling array of net functions he’s outfitted utilizing Django, together with such a lot significantly http://chicagocrime.org. Holovaty and Django lead developer Jacob Kaplan-Moss have created this ebook because the definitive advisor to the technology.
Django: net improvement performed correct is split into 3 elements, with the 1st introducing Django basics comparable to set up and configuration, and developing the elements that eventually interact to strength a Django-driven web site. half II delves into the extra subtle positive aspects of Django, comparable to outputting non-HTML content material like RSS feeds and PDFs, caching, and person administration. half III is an in depth connection with Django’s many configuration innovations and instructions. This ebook serves as either the final word instructional and the go-to reference in this well known framework.
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The view function, hours_ahead, takes two parameters: request and offset. • request is an HttpRequest object, just as in current_datetime. We’ll say it again: each view always takes an HttpRequest object as its first parameter. • offset is the string captured by the parentheses in the URLpattern. For example, if the requested URL were /time/plus/3/, then offset would be the string '3'. If the requested URL were /time/plus/21/, then offset would be the string '21'. Note that captured strings will always be strings, not integers, even if the string is composed of only digits, such as '21'.
1:8000/time/plus/100/ to verify that the pattern in your URLconf 27 28 CHAPTER 3 ■ THE BASICS OF DYNAMIC WEB PAGES only accepts one- or two-digit numbers; Django should display a “Page not found” error in this case, just as we saw in the “404 Errors” section earlier. 1:8000/time/ plus/ (with no hour designation) should also throw a 404. py file now contains two views.