... you can also look at http://web2py.com/examples/default/examples,
perhaps example 30 onward. (Someone sent a post noting you have this same examples application in your local web2py - unfortunately, the message would not post with the localhost links it contained). On Jun 14, 1:36 pm, Yarko Tymciurak <resultsinsoftw...@gmail.com> wrote: > Hi Jeff - > > Have a look at the examples in Chapter 3 > -http://www.web2py.com/book/default/section/3, > particularly leading intohttp://www.web2py.com/book/default/section/3/5 > > This should help you get your example working. > > It is also helpful to think of the flow through web2py of the > request / reqponse: > > brower sends a request > server finds the webapplication web2py (in the default case, the > server is builtin to web2py, but the flow is still the same > reqardless) > within web2py: gluon/main finds the appropriate web2py application & > controller to call > main() sets up the environment for the application controller with all > the models files run (in context) before calling the controller > The controller sets up a context to return a response to the > webbrowser (client), and "returns" a dict to main(). > main() finds the appropriate view (same name as the controller) and > processes the view & templates, with the dict passed by the > controller, renders and returns to the webbrowser. > > For forms this is the thing to remember: the SECOND call to the > controller comes from the client (normally with the same URI, i.e. a > second call to the same controller function). > > This means that the controller with forms (i.e. which wants to save > data from a client interaction) > will: > 1/ setup a form > 2/ check if the form has been filled out (or if it's a first call); > 3/ do error checking / validation to ensure values are valid, and > possibly return to the browser without storing; > 4/ finally, store the values (much is done for you in form.accepts()), > and possibly redirect or display success to the browser. > > Keeping this flow in mind should make the structure shown > inhttp://www.web2py.com/book/default/section/7/1 make sense, e.g.: > > def my_controller: > form = FORM(....) > ... > if form.accepts(....): > # valid entries made > else if form.errors: > # return to the client with feedback; > return dict(form=form) # pass the form to the view as the view > variable 'form' > > .... in the view, you don't need / want all the manual form setup; > you want to render the form object, thus: > > {{=form}} > > ----- > > Hopes this helps you get started. Depending on the level of class, > there are other tutorials / dojos which > are online, were presented at conference workshops. See, for example, > the Videos link on the book page. > > I understand Massimo is away, not readily accessible to the net, but > I'm sure he will point you to more. > In the meantime, I hope this helps. > Let us know if you need more. > > Regards, > - Yarko > > On Jun 14, 9:37 am, Jeff Elkner <j...@elkner.net> wrote: > > > > > It is the end of the school year and my students and I are trying to > > create simple projects using web2py. > > > Can you point me to a "simple" example of web2py creating and > > accessing a database? By "simple" I mean from the teaching > > perspective. I wanted to create a little application that stored > > quotes in a database. Here is what I have so far: > > > The Controller (default.py): > > > def index(): > > return dict() > > > def addquote(): > > form = SQLFORM(db.quotes) > > return dict() > > > The Views (index.html): > > > <?xml version="1.0" encoding="UTF-8"?> > > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" > > "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd";> > > <html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en"> > > <head> > > <title>Quotable Quotes</title> > > <link rel="stylesheet" type="text/css" href="../static/style.css" /> > > </head> > > <body> > > <h1>Quotable Quotes</h1> > > > <h2>Choose:</h2> > > <ul> > > <li><a href="addquote">Add a quote to the database.</a></li> > > </ul> > > > </body> > > </html> > > > and addquote.html: > > > <?xml version="1.0" encoding="UTF-8"?> > > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" > > "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd";> > > <html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en"> > > <head> > > <title>Quotable Quotes</title> > > <link rel="stylesheet" type="text/css" href="../static/style.css" /> > > </head> > > <body> > > <h1>Quotable Quotes</h1> > > > <form> > > <fieldset> > > <legend>Quote:</legend> > > <textarea name="quote" rows="5" cols="100"></textarea> > > </fieldset> > > <fieldset> > > <legend>Author:</legend> > > <input type="text" name="author" /> > > </fieldset> > > <button type="submit">Submit</button> > > <input type="hidden" name="_formname" value="addquote" /> > > </form> > > > </body> > > </html> > > > and finally the db.py file: > > > db = DAL('sqlite://storage.sqlite') > > > db.define_table('quotes', Field('quote'), Field('author')) > > > ++++++++++++++++++++++++++++++++++++++++++++++ > > > The database gets created, and when I visit the addquote.html view, I > > can fill in the forms and click the submit button without error, but > > no rows are added to the table. > > > How can I get that to work? The database chapter in the book is not > > very helpful to a database beginner such as myself, since all the > > examples are from a shell, and it doesn't show how to connect the > > pieces together inside an application. > > > Thanks! > > > jeff elkner
