CODEWITHSUNDEEP
pythondjangodjango-modelsdjango-admin
boatcoder
boatcoder

Reputation: 18117

How do I override this method on a Django Model Field

I'm trying to modify an existing Django Mezzanine setup to allow me to blog in Markdown. Mezzanine has a "Core" model that has content as an HtmlField which is defined like so:

 from django.db.models import TextField


 class HtmlField(TextField):
     """
     TextField that stores HTML.
     """

     def formfield(self, **kwargs):
         """
         Apply the class to the widget that will render the field as a
         TincyMCE Editor.
         """
         formfield = super(HtmlField, self).formfield(**kwargs)
         formfield.widget.attrs["class"] = "mceEditor"
         return formfield

The problem comes from the widget.attrs["class"] of mceEditor. My thoughts were to monkey patch the Content field on the Blog object

class BlogPost(Displayable, Ownable, Content):
    def __init__(self, *args, **kwargs):
        super(BlogPost, self).__init__(*args, **kwargs)
        self._meta.get_field('content').formfield = XXX

My problems are my python skills aren't up to the task of replacing a bound method with a lambda that calls super.

formfield is called by the admin when it wants to create a field for display on the admin pages, so I need to patch that to make the BlogPost widget objects NOT have the class of mceEditor (I'm trying to leave mceEditor on all the other things)

How do you craft the replacement function? I'm pretty sure I attach it with 

setattr(self._meta.get_field('content'), 'formfield', method_i_dont_know_how_to_write)

Upvotes: 0

Views: 1204

Answers (2)

Steve
Steve

Reputation: 1736

I realize this question was answered several months ago, but just in case anyone else comes across it, Mezzanine now provides the ability to completely modify the WYSIWYG editor field. Take a look a the docs for it here:

http://mezzanine.jupo.org/docs/admin-customization.html#wysiwyg-editor

Upvotes: 1

Bernhard Vallant
Bernhard Vallant

Reputation: 50806

You could change the used formfield in the admin's method formfield_for_dbfield:

class BlogAdmin(admin.ModelAdmin):

    def formfield_for_dbfield(self, db_field, **kwargs):
        field = super(BlogAdmin, self).formfield_for_dbfield(db_field, **kwargs)
        if db_field.name == 'content':
            field.widget = ....
            field.widget.attrs['class'] = ...
        return field

If you really want to do the monkey-patching, it should be something like that:

class BlogPost(Displayable, Ownable, Content):
    def __init__(self, *args, **kwargs):
        super(BlogPost, self).__init__(*args, **kwargs)
        def formfield_new(self, *args, **kwargs):
            # do here what you would like to do
            return formfield
        instancemethod = type(self._meta.get_field('content').formfield)
        self._meta.get_field('content').formfield = instancemethod(formfield_new,
                                                                   self, BlogPost)

Upvotes: 1

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