So .. After some investigation, this is probably a problem related to
web.input's interpretation when the form is filled.
When a checkbox is checked, web.input() contains this:
<Storage {'french': u'mustard', 'curly': u'', 'moe': u'', 'bax': u'',
'boe': u''}>
On the other side, when it's not checked, the curly key simply disappears:
<Storage {'french': u'mustard', 'moe': u'', 'bax': u'', 'boe': u''}>
I presume that the form is filled using the keys found in web.input()
instead of using the list of inputs of the form itself, I didn't put the
finger on the exact place where it stands :-[
I'm trying to write the smallest patch for form.py, but I'm not the
python's superheroe I would dream of, so I have to work a little on that. ;)
Before I find the holy grail, you might fix this behaviour on your side
reading the keys of web.input and checking the checkbox by yourself
(always on the example...) :
def POST(self):
form = myform()
if not form.validates():
* if 'curly' in web.input():
form['curly'].set_value(True)*
return render.formtest(form)
else:
# form.d.boe and form['boe'].value are equivalent ways of
# extracting the validated arguments from the form.
return "Grrreat success! boe: %s, bax: %s" % (form.d.boe,
form['bax'].value)
This seems to give pretty good results here :)
Regards,
Christophe.
Le 08/04/2015 07:52, Christophe a écrit :
Ooops I realize I misunderstood your first question... My apologies.
I ran some test on my side and found that this behavior might be
related to the validates() method.
I re-used the example given in http://webpy.org/form and modified a
little the POST method to understand when the checkbox had lost its
checked attribute:
def POST(self):
form = myform()
print form.render() # prints bare HTML in the console
if not form.validates():
print form.render() # re-prints if form is'nt valid
return render.formtest(form)
else:
# form.d.boe and form['boe'].value are equivalent ways of
# extracting the validated arguments from the form.
print form.render() # re-prints anyway
return "Grrreat success! boe: %s, bax: %s" % (form.d.boe,
form['bax'].value)
Whenever the form validates or not, I got this in the console:
Konsole output
127.0.0.1:44907 - - [08/Apr/2015 07:37:35] "HTTP/1.1 GET /" - 200 OK
*### First call to index*
<table> *### Start of first print*
<tr><th><label for="boe">boe</label></th><td><input type="text"
id="boe" name="boe"/></td></tr>
<tr><th><label for="bax">bax</label></th><td><input type="text"
id="bax" name="bax"/></td></tr>
<tr><th><label for="moe">moe</label></th><td><textarea id="moe"
name="moe"></textarea></td></tr>
<tr><th><label for="curly_">curly</label></th><td>*<input
checked="checked" type="checkbox" id="curly_" value=""
name="curly"/>*</td></tr> *### In red, the checkbox that won't check,
here it is already checked*
<tr><th><label for="french">french</label></th><td><select
id="french" name="french">
<option value="mustard">mustard</option>
<option value="fries">fries</option>
<option value="wine">wine</option>
</select>
</td></tr>
</table>
<table>
<tr><th><label for="boe">boe</label></th><td><input type="text"
id="boe" value="" name="boe"/></td></tr>
<tr><th><label for="bax">bax</label></th><td><input type="text"
id="bax" value="7" name="bax"/></td></tr>
<tr><th><label for="moe">moe</label></th><td><textarea id="moe"
name="moe"></textarea></td></tr>
<tr><th><label for="curly_">curly</label></th><td>*<input
type="checkbox" id="curly_" value="" name="curly"/>*</td></tr> *###
Here, checked attribute vanished...*
<tr><th><label for="french">french</label></th><td><select
id="french" name="french">
<option selected="selected" value="mustard">mustard</option>
<option value="fries">fries</option>
<option value="wine">wine</option>
</select>
</td></tr>
</table>
127.0.0.1:44907 - - [08/Apr/2015 07:37:41] "HTTP/1.1 POST /" - 200 OK
I did'nt look further in the web.py source code to understand this
behaviour, but I think you found a little bug related to the
validates() method.
I'll take a look later in the day.
Regards,
Christophe.
Le 07/04/2015 23:37, [email protected] a écrit :
Hi Zbouboutchi,
I used
|
myform =form.Form(
...
form.Checkbox('Image #1',checked=True),
form.Checkbox('Image #2',checked=True),
form.Checkbox('Image #3',checked=True)
)
|
in the app.py to define several checkbox whose default status are
checked. If I insert
|
<inputtype="checkbox"checked>
|
in the templates/*.html. I just got an additional checkbox (checkbox
only without label) which is checked in the first rendering and
re-rendering but my own checkbox keep unchanged. Not sure if I
understand you correctly. Thank you for your suggestion and help.
Best Regards,
-Yongzhi
On Tuesday, April 7, 2015 at 1:38:20 PM UTC-7, Zbouboutchi wrote:
(re)Hi,
I presume using bare HTML might prevent this behaviour:
<input type="checkbox" checked>
Regards,
Christophe.
Le 07/04/2015 19:56, [email protected] <javascript:> a écrit :
Hello all,
I implement a form app by following the online instruction
(http://webpy.org/form). In my code, I use the definition
form.Checkbox('Image #1', checked=True),
so it is checked when user accesses this form page. I noticed
that if there is any validation failure and the form was
re-rendered, all checkbox would be in unchecked status. I just
wonder if there is an easy way to keep all those checkbox
checked in the re-rendered form. Thanks a lot.
Best Regards,
-Yongzhi
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