I have noted one problem with my suggestion. As coded, a standard,
non-custom form throws an error with customview not defined. I
thought that
if self.customview and self.customview=True:
in FORM.xml() would catch the absence of customview but doesn't seem
to(?) so I have changed it to
if not self.customview: self.customview=False
if self.customview==True:
Bill
On Oct 14, 3:15 pm, mdipierro <[EMAIL PROTECTED]> wrote:
> give me some time to digest this. could email it to me again. the
> indentation is messed up.
>
> On Oct 14, 5:58 am, billf <[EMAIL PROTECTED]> wrote:
>
> > My objective is to be able to hand-code my own view containing a form
> > that I can layout exactly as I want but retain the benefits of
> > accepts() re validation and db updating.
>
> > I found 2 obstacles with web2py out-of-the box:
> > 1) In my view (I have less than 1 week of python), I did not have easy
> > access to the latest version of a field: defaults could be in
> > form.record.my_field (but not for a new record) but if the user has
> > input data then it is in form.vars.my_field. I wanted a consistent
> > source and the only place is form.components but extracting the values
> > in the view seems difficult due to the nested nature of components.
>
> > 2) For dropdown lists, the value is not enough. I want the whole
> > <select><options> etc including which option is selected.
>
> > If I can achieve the above there are a couple of other requirements:
> > 3) For completeness, support for the session/formkey mechanism and any
> > other hidden fields that may be specified.
>
> > 4) If I display the whole control (as in 2) above), I don't want any
> > pre-formatted errors. I can get the necessary info from form.errors.
>
> > With my solution, the usage is as follows:
> > - in a controller, after the SQLFORM(db.recipe) or FORM(whatever) is
> > created add form.customview=True
>
> > - in a view, after the <form> tag for your custom form add {{=form}} -
> > this will create a Storage called 'latest' in FORM with a 'value' and
> > a 'component' for each fieldname and return the following:
> > <!-- custom view -->
> > <input value="130911852535" type="hidden" name="_formkey" />
> > <input value="recipe" type="hidden" name="_formname" />
> > ... plus any other hidden INPUTS specified in the form
>
> > - if you just want the latest value for a fieldname 'name' then code
> > something like
> > <input type="text" name="name" value="{{=form.latest.name['value']}}"/
>
> > - if you just want the whole control then code something like
> > {{=form.latest.name['component']}} to get
> > <input type="text" class="string" name="name" value="Cornish Pasty"
> > id="recipe_name" />"
>
> > - or, where the field has IS_IN_SET, code
> > {{=form.latest.type['component']}} to get
> > <select class="string" name="type" id="recipe_type"><option
> > value="A">accompaniment</option><option value="C">component</
> > option><option value="R" selected="selected">recipe</option></select>
>
> > So, assuming anyone's still interested, what changes did I make to the
> > web2py code? Well, it's all in html.py and makes use of a new Storage
> > attribute called 'latest' added to FORM if customview is present and
> > True:
>
> > a) replace the existing FORM.xml() method with the following:
> > def xml(self):
> > if self.customview and self.customview==True:
> > self._latestdata()
> > # return hidden INPUTs in response to {{=form}}
> > hidden=''
> > field=self.latest['hidden']
> > for component in field['component']:
> > hidden+=component.xml()+'\n'
> > return '<!-- custom view -->\n'+hidden
> > else:
> > # exactly the same as old xml() except hidden logic in
> > common method _hiddendata([])
> > newform=FORM(*self.components,**self.attributes)
> > self._hiddendata(newform.components)
> > return DIV.xml(newform)
> > # common method for creating/storing formkey and creating hidden
> > INPUTs - taken from original xml()
> > def _hiddendata(self, components):
> > if self.session!=None:
> > _formkey='_formkey[%s]' % self.formname
> > key=self.session[_formkey]=str(random.random())[2:]
>
> > components.append(INPUT(_type='hidden',_name='_formkey',_value=key))
> > if self.formname!=None:
> > components.append(INPUT(_type='hidden',_name='_formname',\
> > _value=self.formname))
> > if self.attributes.has_key('hidden'):
> > hidden=self['hidden']
> > for key,value in hidden.items():
>
> > components.append(INPUT(_type='hidden',_name=key,_value=value))
> > # create the Storage to hold value and component for each
> > fieldname + one for 'hidden' INPUTs
> > def _latestdata(self):
> > self.latest=Storage()
> > components=[]
> > self._hiddendata(components)
>
> > self.latest['hidden']={'value':'hidden','component':components}
> > for component in self.components:
> > component._latestdata(self.latest)
>
> > a) add the following to DIV to find the required component and store
> > in latest Storage
> > def _latestdata(self, latest):
> > # the following code checks whether the component can have
> > user input and
> > # if true stores the value and component using the latestitem
> > helper
> > # if false iterates through child components
> > if self.attributes.has_key('_value') and\
> > self.attributes.has_key('_name'):
>
> > latest[self.attributes['_name']]=self.latestitem(self.attributes['_value'],self)
> > elif isinstance(self,SELECT) and\
> > self.attributes.has_key('_name'):
>
> > latest[self.attributes['_name']]=self.latestitem(None,self)
> > elif isinstance(self,TEXTAREA) and\
> > self.attributes.has_key('value') and\
> > self.attributes.has_key('_name'):
> > value=self.attributes['value']
> > if value==None: value=''
>
> > latest[self.attributes['_name']]=self.latestitem(value,self)
> > elif self.components:
> > for c in self.components:
> > if hasattr(c,'_latestdata'): c._latestdata(latest)
> > # store value and component ensuring any errors are ignored
> > def latestitem(self, value, component):
> > component.errors=None
> > return {'value':value,'component':component}
>
> > That's it - it all seems to work a treat. All feedback gratefully
> > received (this is where Massimo tells me it could all have been done
> > with 2 lines of python and a regex) :-)
>
> > Bill
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"web2py Web Framework" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/web2py?hl=en
-~----------~----~----~----~------~----~------~--~---
