django在自定义保存方法中访问字段

Question

我被困住了，我一直在试图了解如何覆盖save方法，而我却被困在如何访问需要保存的字段上。我已经用尽了堆栈交换和文档，但是无法正常工作。

Class ProjectModelForm（forms.ModelForm）： “” 用于创建和编辑项目的表格。认证用户 需要登录。 “” 标题= Forms.CharField（widget = forms.Textarea） 摘要= Forms.CharField（widget = forms.Textarea） others = form.CharField（widget = forms.Textarea，required = False）

class Meta:
    model = Project
    fields = (
        'area',
        'title',
        'summary',
        'others',
        'staff_trials',
        'launch',
    )
    # widgets = {
    #     'launch': DateInput(),
    #     'staff_trials': DateInput(),
    # }

def __init__(self, *args, **kwargs):
    super(ProjectModelForm, self).__init__(*args, **kwargs)
    self.fields['title'].widget.attrs['cols'] = 100
    self.fields['title'].widget.attrs['rows'] = 1
    self.fields['summary'].widget.attrs['cols'] = 100
    self.fields['summary'].widget.attrs['rows'] = 8
    self.fields['others'].widget.attrs['cols'] = 16
    self.fields['others'].widget.attrs['rows'] = 3

def clean(self):
    cleaned_data = super().clean()
    staff_trials = cleaned_data.get("staff_trials")
    launch = cleaned_data.get("launch")
    timeline_st = cleaned_data.get("timeline_st")

    if launch < date.today():
        raise forms.ValidationError(
            "Date must be a future date."
        )
    if staff_trials:
        if staff_trials < date.today():
            raise forms.ValidationError(
                "Date must be a future date."
            )

        if launch < staff_trials:
            raise forms.ValidationError(
                "Launch date cannot be before Staff Trials."
            )
    return cleaned_data

def save(self, commit=True):
    instance = super(ProjectModelForm, self).save(commit=False)
    timeline_st = self.clean_data['timeline_st']
    timeline_st = True
    if commit:
        timeline_st.save()
    return instance

如何发现访问字段所需的方法，看来它们都是不同的。