Django Book Notes---form forms

     First look at the following simple method: From django.http import httpresponsedef hello (Request ):     return httpresponse ("Hello world")      We can get a lot of information     request from this request. meta  is a Python dictionary that contains header information for all HTTP requests, such as the user's IP address and user agent (usually the name and version number of the browser).   Note that the complete list of header information depends on the header information sent by the user and the header information for the server-side settings.   Several common key values in this dictionary are:     http_referer, pre-pit link page, if any.   (Please note that it is referrer's clerical error.) )     http_user_agent, the user-agent string of the user's browser, if any.   For example: "mozilla/5.0  (x11; u; linux i686; fr-fr; rv:1.8.1.17)  Gecko/ 20080829 firefox/2.0.0.17 " .    REMOTE_ADDR  client IP, such as:" 12.345.67.89 " . (If the request is a proxy server, it may be a comma-separated number of IP addresses, such as: "12.345.67.89,23.456.78.90"  .)      use the Get method to access a key value      ua = request that may not exist. Meta.get (' http_user_agent ',  ' unknown ')    &nbspThe data using the Get method is passed through the query string (for example,/search/?q=django), so we can use Requet. Get to get these data: request.get[' Q '] Create your own form class: >>> from contact.forms import contactform >>> f = contactform () >>> print f<tr><th><label  For= "Id_subject" >subject:</label></th><td><input type= "text"  name= "subject"  id= "Id_subject"  /></td></tr><tr><th><label for= "Id_email" > Email:</label></th><td><input type= "text"  name= "email"  id= "Id_email"   /></td></tr><tr><th><label for= "Id_message" >Message:</label></ Th><td><input type= "text"  name= "message"  id= "Id_message"  /></td></ tr> default output is table format, we can also output UL, p format print f.as_ul () print f.as_p () to create a form>>> f =  contactform ({' Subject ':  ' Hello ',  ' email ':  ' [email protected] ',  ' message ':  ' nice site! '}) >>> f.is_boundtrue>>> f.is_valid ()      Verify that the data is valid true to view the error message for the form: >>> f = contactform ({' Subject ':  ' Hello ',  ' message ':  '}) >>>  f[' message '].errors[u ' this field is required. ' >>> f[' subject '].errors[]>>> f[' email '].errors[] Cleanup data: >>> f.cleaned_ Data{message ':  unice site!, email: [email protected], subject: uhello}

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Django Book Notes---form forms