django - Conditionally required fields across forms? -

-

i've got 2 forms on 1 page. if user selects option on 1 form, want make option on other form no longer required. how can that? don't think can put logic in clean method because they're separate forms.

you can in view, long set required flag false before call is_valid on second form.

class myform1(forms.form):     other_field_required = forms.booleanfield(required=false)  class myform2(forms.form):     sometimes_required = forms.charfield(required=true)  def myview(request):     form1 = myform1(request.post)     form2 = myform2(request.post)      if form1.is_valid():         if not form1.cleaned_data['other_field_required']:             form2.fields['sometimes_required'].required = false      ...         if form2.is_valid(): # form2 valid if other_field_required false

or, add myform2 argument first form's __init__ method, can put logic in clean method.

class myform1(forms.form):     other_field_required = forms.booleanfield(required=false)      def __init__(myform2, *args, **kwargs):         super(myform1, self).__init__(*args, **kwargs)         self.form2 = form2      def clean(self):         if not self.cleaned_data['other_field_required']:             self.form2.fields['other_field_required'].required = false ...  def myview(request):     form2 = myform2(request.post)     form1 = myform1(form2, data=request.post)     ...

Comments

Post a Comment

Popular posts from this blog

c++ - Compiling static TagLib 1.6.3 libraries for Windows -

-
i having super hard time compiling , using taglib 1.6.3 in qt project. i've tried can think of. taglib claims supported through cmake i'm not having luck. furthermore, i'm confused kinds of files need qt libs! i've built *.a files, *.lib, , *.dll. understand far... believe since i'm working in windows *.lib want. no matter do, end "undefined references" taglib functions try use when try compile qt project. have tried mingw32, msys, visual studio 2008, , cross-compiling windows on linux. turning nothing. what makes less sense me if compile same taglib source qt on mac (g++ think?) works fine! somewhere in windows compilation procedures have going wrong. have been smacking face on desk 30 (on , off) hours trying figure out. since qt uses mingw must compile taglib same compiler? if compile *.lib's visual studio not compatible? are *.a libraries usable in windows? (assuming mingw) i'm still trying handle on c++ stuff, after reading coun...
Read more

PostgreSQL 9.x - pg_read_binary_file & inserting files into bytea -

-
i have been looking everywhere (google, stackoverflow, etc.) documentation on how use postgresql pg_read_binary_file() function. the meaningful thing can find this page in official documentation. every time try use function error. for example: select pg_read_binary_file('/some/path/and/file.gif'); error: absolute path not allowed or select pg_read_binary_file('file.gif'); error: not stat file "file.gif": no such file or directory do need have file in specific directory postgres have access it? if directory? if matters, reason looking @ function because trying insert file database without doing crazy things . as stated @a_horse_with_no_name , @guedes solution ensure file being uploaded on server in pgdata directory. the postgres documentation state file location requirement. additionally, made symlink directory pgdata directory not disturb of postgres data structure. seems working , don't have of above...
Read more

jtree - comparing two TreeNode (or DefaultMutableTreeNode) objects in Java Comparator -

-
my goal simple today, trying work out proper way implement compareto (or comparable) interface class extends defaultmutabletreenode. the problem this : have class represents times. i've written compareto method (which works desire) i've tested out arrays.sort() marvelous results. now lets have jtree bunches of different objects, this: new specialnode("zomg string!"); // add group of nodes right here new specialnode(new time("8:55 pm")); new specialnode(new sometypeyouveneverheardof()); so, being professional programmer, start coding without forethought whatsoever. here specialnode class: class specialnode extends defaultmutabletreenode implements comparator<specialnode> { public int compareto(specialnode sn) { // not not work correctly (read: @ all) // but, sub-par, how type information out of userobject // can cast correctly , call correct compareto method!! return this.getuserobject()....
Read more