The whole chapter 7 (http://web2py.com/books/default/chapter/29/07/)
Is basically that!! If you follow example step by step you should better understand how it works... You can have a read of chapter 3 ( http://web2py.com/books/default/chapter/29/03/) And the chapter 1 ( http://web2py.com/books/default/chapter/29/01/introduction#In-the-box), there is some graph with big picture details... I would have difficulties to make a comprehensive resume here of all what contained in this chapters... But read them is pretty straightforward and comprehensive... Richard On Fri, Jan 30, 2015 at 4:04 PM, Eric <[email protected]> wrote: > Richard, > > Thank you for your kind response. I did find the SQLFORM example and got > it to present the form and accept a file. I'm still struggling with an > overall idea of how things work in Web2py (and perhaps the web itself). Is > there a resource that clearly describes what happens when a page is > accessed the order or processing what happens. I don't quite understand > what Python code is triggered immediately, how messages or whatever are > generated as someone interacts with the page, etc. This is a general > question and I'm sure there are good recourses for me to read. What I'm > trying to avoid is just assuming some "magic" happens. > > Eric > > On Thursday, January 29, 2015 at 12:20:53 PM UTC-6, Richard wrote: >> >> Without the code from your controller and view it is more difficult to be >> sure of what you are talking about exactly... >> >> I guess you have wrote a model, where you define a field of type upload, >> then you want to understand how the upload of the file works and thing get >> done... >> >> A simple question may be hard to draw, there is many code layer >> involves, but book explanation about upload may be a good start for you to >> understand : >> http://web2py.com/books/default/chapter/29/07/forms- >> and-validators#SQLFORM-and-uploads >> >> Web2py is a framework, so many things that you may use to write from >> scratch in php are readily available in web2py without you to butter >> recoding them, except if you need custom things not offers and even then, >> there many ways to tweaks web2py default feature most of the time, passing >> just more parameters... >> >> Richard >> >> On Wed, Jan 28, 2015 at 10:46 AM, Eric <[email protected]> wrote: >> >>> Sorry if this is too basic a question. I very new to web programming and >>> Web2py. I have written some desktop applications. Where I'm having trouble >>> right now is understanding exactly how the Python code in Web2py interacts >>> with the HTML. In my desktop GUI apps, a control like a button generates a >>> trigger or callback which I can capture and execute code in response. I'm >>> sure something like this is happening in web apps too, but I'm not quite >>> getting how it works. For example, If I place the following tag in the >>> HTML: >>> <input type="file" name="fileID"> >>> the page will display a button with which I can select a file with the >>> browser's open file dialog. It will even show the file name on the page >>> after selection. What I can't see is how I execute a Python function in >>> response to this selection or how to get the filename to the function. I'm >>> thinking I need some basic instruction in how web programming works so any >>> references would be appreciated. I've been working my way through an >>> on-line HTML tutorial, but it seems that javascript is also important. >>> >>> Thanks in advanced, >>> >>> Eric >>> >>> -- >>> 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. >>> >> >> -- > 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. > -- 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.
