Problem collecting POST data using a WTForms form

[pgoetz]

I'm trying to use WTForms with limited success, and am wondering if anyone knows how to pass request.forms.POST data to a WTForms form.

Sending a blank form works fine:

@rolodex.get('/add_new')
def new_entry_form():
    form = RolodexEntry()
    return bottle.template('entry_form2',form=form)

However, when I try and stuff the posted data back into a form, I get an internal server error:

@rolodex.post('/add_entry')
def add_entry():
    new_entry = RolodexEntry(request.forms.POST)
    ...

This would be easier to debug if I knew what format the WTForms form is expecting formdata to be in (question posted on the WTForms list), but meanwhile I'm curious to know if anyone has gotten this working.

[Iuri]

Please, enable bottle debug mode and copy/paste the error here.

bottle.debug(True)

thanks!

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[pgoetz]

Hi Luri -

Sadly, I have bottle running in debug mode already, but the error message I get doesn't tell me anything.  Here is the actual route (if I comment on the new_entry = line, I get Success!!!!, as expected)

@rolodex.post('/add_entry')
def add_entry():
    new_entry = RolodexEntry(request.forms.POST)

#    return(" ".join([field.name for field in new_entry]))
    return("Success!!!!")


Here is the the resulting error message:

Error: 500 Internal Server Error

Sorry, the requested URL 'http://127.0.0.1:8080/add_entry' caused an error:

Internal Server Error

[Iuri]

It is difficult to help without information.

This issue https://github.com/defnull/bottle/issues/250 has some WTForms code.

--

[pgoetz]

I understand; I'm trying to look at the source code now.  I tried both of the different syntax examples in the link you provided below, and still get the same error message.  I guess I should have also mentioned that I'm using bottle 0.11.6.

This is the relevant code from WTForms form.py file.  I only have the 0.12 bottle source code, but it looks like bottle supports the getlist method via getall:

getlist = getall

    def process(self, formdata=None, obj=None, **kwargs):
        if formdata is not None and not hasattr(formdata, 'getlist'):
            if hasattr(formdata, 'getall'):
                formdata = WebobInputWrapper(formdata)
            else:
                raise TypeError("formdata should be a multidict-type wrapper that supports the 'getlist' method")

        for name, field, in iteritems(self._fields):
            if obj is not None and hasattr(obj, name):
                field.process(formdata, getattr(obj, name))
            elif name in kwargs:
                field.process(formdata, kwargs[name])
            else:
                field.process(formdata)

[Sathit Jittanupat]

I 've never use WTForms, but notice..

1.     new_entry = RolodexEntry(request.forms.POST)

 why not 

request.POST.decode() or request.forms.decode().

http://bottlepy.org/docs/dev/tutorial.html#request-data

2. request.forms.POST is FormsDict instance not a dict,

If WTForms requires a dict instance this may cause error.  

use dict(request.POST)

2013/4/20 pgoetz <pgo...@gmail.com>

[pgoetz]

Thanks!  That worked.  I had the wrong version of the documentation open again (0.10), which didn't include the comment about how to make WTForms work as per the link you provided.  For other people reading this, this POST processing route works:

@rolodex.post('/add_entry')
def add_entry():

    new_entry = RolodexEntry(bottle.request.forms.decode())
    myfields = ""
    for field in new_entry:
        myfields += "<p>" + field.name + ": " + field.data + "</p>\n"
    return(myfields)