Python Flask -如何使用SubmitField删除对象？

Question

我有点困惑如何在一个页面上有一个“删除”按钮来删除当前焦点的对象。

我正在尝试将此按钮添加到/edit/以删除任何打开的id

使用Python3和Flask

forms.py

class EditForm(Form):
  name = StringField('Server Name', validators = [Length(1, 120), DataRequired()])
  ip_address = StringField('IP Address', validators = [Length(1, 16), IPAddress()])
  username = StringField('UCX User', validators = [Length(1, 64)])
  password = StringField('UCX Password', validators = [Length(1, 64)])
  description = StringField('Purpose/Description', validators = [Length(1-120)])
  protocol = RadioField('Protocol', [DataRequired()],
           choices=[('https', 'HTTPS'), ('http', 'HTTP')], default='https')

  submit = SubmitField('Submit')
  **delete = SubmitField('Delete')**

Routes.py

@servers.route('/edit/<id>', methods=['GET', 'POST'])    
def edit(id):
  server = UcxServer.query.filter_by(id=int(id)).first_or_404()
  form = EditForm(obj=server)
  if form.validate_on_submit():
      form.to_model(server)
      db.session.commit()
      flash('Your changes have been saved.')

  return render_template('addserver2.html', form=form)

Routes.py删除功能：

@servers.route('/delete/<id>')
def delete(id):

server = UcxServer.query.filter_by(id=int(id)).first_or_404()
try:
  db.session.delete(server)
  db.session.commit()
  flash('Successfully deleted the {} server'.format(server))
  return redirect(url_for('servers.index'))

模板(addserver2.html)：

{% extends "base.html" %}
{% import "bootstrap/wtf.html" as wtf %}

{% block page_content %}
<div class="page-header">
<h1>UCX Server</h1>
</div>
{{ wtf.quick_form(form) }}
{% endblock %}

所以基本上，我可以加载编辑/页面，但是我如何连接"Delete“SubmitField来调用/delete/呢？

Answer 1

我想通了。为未来的人们张贴答案。不确定是不是最好的方法，但只用了两行代码：

对于/edit/ route，我简单地添加了这个检查。

if form.delete.data:

    return redirect(url_for('servers.delete', id=id))

这使得整个编辑路线看起来像这样：

def edit(id):
  server = UcxServer.query.filter_by(id=int(id)).first_or_404()
  form = EditForm(obj=server)
  if form.delete.data:

    return redirect(url_for('servers.delete', id=id))

  if form.validate_on_submit():
    form.to_model(server)
    db.session.commit()
    flash('Your changes have been saved.')

  return render_template('addserver2.html', form=form)

Answer 2

也许你可以使用定制的验证器。如下所示：

delete = SubmitField('Delete', validators=delete())

有关如何使函数成为自定义验证器的信息，请查看此link。自定义验证器部分。