我正在尝试解决这个问题,但由于某种原因,到目前为止每次尝试都失败了。我有两个简单的模型:问题和答案:
class Question(models.Model):
phoneID = models.CharField(max_length=255, editable=False)
name = models.CharField(max_length=255, editable=False)
phone = models.CharField(max_length=255, editable=False)
message = models.TextField(editable=False)
answered = models.DateTimeField(editable=False)
created = models.DateTimeField(auto_now_add=True, default=datetime.utcnow())
class Answer(models.Model):
question = models.ForeignKey(Question)
message = models.TextField()
created = models.DateTimeField(auto_now_add=True, default=datetime.utcnow())
由于某种原因,我无法弄清楚应该在 admin.py 中放入什么内容,以便将之前添加的答案内联列为只读,同时允许添加内联新答案。每次我设置 readonly_fields=('message') 时,我都无法添加新答案,因为消息文本区域是只读的。
好的,我明白你想要什么。为此,您可以创建一个特殊的小部件,它将显示字段值,同时将成为隐藏的输入。使用此小部件获取以前的答案:
from django.forms.widgets import Widget
from django.forms.utils import flatatt
from django.utils.html import format_html
class ReadOnlyInput(Widget):
def render(self, name, value, attrs=None):
if value is None:
value = ''
final_attrs = self.build_attrs(attrs, type='hidden',
name=name, value=value)
return format_html('<input{} />{}', flatatt(final_attrs), value)
class AnswerForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(AnswerForm, self).__init__(*args, **kwargs)
if self.instance.pk:
self.fields['message'].widget = ReadOnlyInput()
class AnswerInline(admin.TabularInline):
form = AnswerForm
model = Answer
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