Django Model Form object has no attribute cleaned data

Question

I am trying to make a search form for one of my classes  The model of the form is   from django import forms from django forms import CharField  ModelMultipleChoiceField  ModelChoiceField from books models import Book  Author  Category  class SearchForm forms ModelForm       authors   ModelMultipleChoiceField queryset Author objects all   required False          category   ModelChoiceField  queryset Category objects all   required False      class Meta          model   Book         fields     title     And the view I m using is   from django shortcuts import render to response  redirect  get object or 404 from django template import RequestContext from books models import Book Author from books forms import BookForm  SearchForm from users models import User  def search book request       if request method     POST           form   SearchForm request POST          if form is valid                form   SearchForm request POST              stitle   form cleaned data  title               sauthor   form cleaned data  author               scategory   form cleaned data  category       else          form   SearchForm       return render to response  books create html              form   form         context instance RequestContext request     The form shows up fine  but when I submit it I get an error   SearchForm  object has no attribute  cleaned data   I m not sure what s going on  can someone help me out  Thanks

User · Answer

At times   if we forget the  return self cleaned data    in the clean function of django forms  we will not have any data though the form is valid   will return True

User · Answer

I would write the code like this   def search book request       form   SearchForm request POST or None      if request method     POST  and form is valid            stitle   form cleaned data  title           sauthor   form cleaned data  author           scategory   form cleaned data  category           return HttpResponseRedirect   thanks        return render to response  books create html              form   form         context instance RequestContext request     Pretty much like the documentation

User · Answer

For some reason  you re re-instantiating the form after you check is valid    Forms only get a cleaned data attribute when is valid   has been called  and you haven t called it on this new  second instance   Just get rid of the second form   SearchForm request POST  and all should be well

[python] Django: Model Form "object has no attribute 'cleaned_data'"

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