Useful class for easymode to hide parent_link field

[nnseva]

It is useful to hide parent_link field totally while editing a sub-model using InvisibleModelAdmin. The following snippet does it.

from easymode.tree.admin.relation import InvisibleModelAdmin
from django.forms.widgets import HiddenInput

class HideParentModelAdmin(InvisibleModelAdmin):
    def get_fieldsets(self, request, obj=None):
        fss = super(HideParentModelAdmin,self).get_fieldsets(request,obj)
        found = False
        newfss = [(f[0],f[1].copy()) for f in fss]
        for fs in newfss:
            cols = []
            for fcol in fs[1]['fields']:
                if isinstance(fcol,basestring):
                    if fcol == self.parent_link:
                        found = True
                        continue
                    cols.append(fcol)
                    continue
                rows = []
                for frow in fcol:
                    if frow == self.parent_link:
                        found = True
                        continue
                    rows.append(frow)
                if rows:
                    cols.append(tuple(rows))
            fs[1]['fields'] = tuple(cols)
        if found:
            newfss.append( ('',{'fields':((self.parent_link,),),'classes':['collapse',]}) )
        return newfss
    def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
        if db_field.name == self.parent_link:
            kwargs['widget'] = HiddenInput
        return super(HideParentModelAdmin,self).formfield_for_foreignkey(db_field, request, **kwargs)
    save_as = True

Just because the "Save and add another" button does not have sense in this case, it has been changed to "Save As" button.

[specialunderwear]

Cool, thanks I'll look inti it