Am Mittwoch, 26. September 2007 12:09 schrieb [EMAIL PROTECTED]:
> I'm a completely new user, I've a lot of experience in Delphi, C++
> programming, and some on Python, but now I 've the challenge to conver
> entirely an application from Delphi to web. The application has in the
> magnitude of 1000 tables.
>
> I'm evaluating Django and TurboGears.
>
> I've a few initial questions for do some tests and decide upon witch
> platform I'll choose.
>
> 1. How can I do a lookup field that must be choosen from another table
> that has >100000 records
> I would like to have a "component" with a button that opens a new
> form that let me browse in some group of records, filtered for some
> user guess, and let me choose the record desired that fills in the
> initial "component"
Hi,
I wrote myself a ButtonWidget. It's opens a new browser window. This
window displays a search form. After searching you can choose one
row. The id of the row get's saved (javascript opener.getElementById("..."))
back to the original form and the pop up closes itself.
> 2. I read about a generic browse, I woud like also a generic browse
> that some columns are editable. It's a common paradigm in my
> apllication to let the user edit several records at once in a tabular
> format, that is very natural for the domain in hands.
Do you mean Databrowse? It's read only. You can't edit with it. You can
use the admin interface for a read write access.
The admin interface is nice for you as developer. But I don't show
it my customers.
Here is my ButtonWidget:
class ButtonWidget(forms.widgets.Input):
input_type="hidden"
def __init__(self, popup_url, model, attrs=None, querydict=None,
input_type=None, pk_search=True):
if input_type:
self.input_type=input_type
forms.widgets.Input.__init__(self, attrs)
self.popup_url=popup_url
self.model=model
if querydict==None:
querydict={}
self.querydict=querydict
self.pk_search=pk_search
def value2querydict(self, value, querydict):
if not value:
return
if self.pk_search:
querydict[self.model._meta.pk.name]=value
def render(self, name, value, attrs=None):
# From forms.widgets.Input
if value is None: value = ''
final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
if value != '':
final_attrs['value'] = force_unicode(value) # Only add the 'value'
attribute if a value is non-empty.
assert not self.querydict.has_key("saveto"), self.querydict
querydict=self.querydict.copy()
querydict["saveto"]=name
try:
value=int(value)
except ValueError:
pass
if not value:
display="---"
elif isinstance(value, basestring):
# Kein Integer. Fehlerwert wieder anzeigen (inkl. Fehlermeldung)
display=value
else:
try:
obj=self.model.objects.get(**{self.model._meta.pk.name: value})
except self.model.DoesNotExist:
obj=value
display=escape(force_unicode(obj))
self.value2querydict(value, querydict)
onclick="SelectPopup('%s?%s')" % (
escape(self.popup_url), escape(urllib.urlencode(querydict,
doseq=True)))
return u'<span style="white-space: nowrap"><input%s /> <input
type="button" id="display_%s" value="%s" onclick="%s"/></span>' % (
forms.widgets.flatatt(final_attrs), final_attrs["name"],
display, onclick)
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