Question

我正在玩烧瓶和烧瓶 - appbuilder模块，我有一个问题，我无法解决。我在views.py中有这段代码：

from flask.ext.appbuilder import AppBuilder, BaseView, expose, has_access, SimpleFormView
from flask_appbuilder._compat import as_unicode
from app import appbuilder
from wtforms import Form, StringField, BooleanField, TextField, SelectMultipleField
from wtforms.validators import DataRequired
from flask_appbuilder.fieldwidgets import BS3TextFieldWidget, DatePickerWidget
from flask.ext.appbuilder.forms import DynamicForm

from flask.ext.babelpkg import lazy_gettext as _
from wtforms.fields.html5 import DateField
from flask import flash, send_file, redirect, url_for
from scripts.create_excel import excelstuff


class MyView(BaseView):
    default_view = 'method1'

    @expose('/method1/')
    @has_access
    def method1(self):
        # do something with param1
        # and return to previous page or index
        return 'Hello'

    @expose('/method2/<string:param1>')
    @has_access
    def method2(self, param1):
        # do something with param1
        # and render template with param
        param1 = 'Goodbye %s' % (param1)
        return param1

    @expose('/method3/<string:param1>')
    @has_access
    def method3(self, param1):
        # do something with param1
        # and render template with param
        param1 = 'Goodbye %s' % (param1)
        self.update_redirect()
        return self.render_template('method3.html',
                                    param1=param1)

    @expose('/download/<string:filename>')
    @has_access

    def download(filename):
        return send_file(appbuilder.app.config['UPLOAD_FOLDER'] + filename,
                         as_attachment=True)


# Forms
class MyForm(DynamicForm):
    field1 = StringField(('Field1'),
                         description=('Your field number one!'),
                         validators=[DataRequired()], widget=BS3TextFieldWidget())
    field2 = StringField(('Field2'),
                         description=('Your field number two!'), widget=BS3TextFieldWidget())
    start = DateField('Start Date', format='%Y-%m-%d', validators=[DataRequired()], widget=DatePickerWidget())
    end = DateField('Start Date', format='%Y-%m-%d', validators=[DataRequired()], widget=DatePickerWidget())
    project1 = SelectMultipleField('Projects', choices=[('1', 'Choice1'), ('2', 'Choice2'), ('3', 'Choice3')],
                                   coerce=unicode, validators=[DataRequired()])
    username = StringField('Username', validators=[DataRequired()], widget=BS3TextFieldWidget())


class MyFormView(SimpleFormView):
    default_view = 'this_form_get'
    form = MyForm
    form_title = 'This is my first form view'

    message = 'My form submitted'

    def form_post(self, form):
        # process form
        flash(as_unicode(form.field1.data), 'info')
        excelstuff(as_unicode(form.field1.data))
        return redirect(url_for('myview.download', filename='demo.xlsx'))




appbuilder.add_view(MyFormView, "My form View", icon="fa-group", label=_('My form View'),
                    category="My Forms", category_icon="fa-cogs")
appbuilder.add_view(MyView, "Method1", category='My View')
appbuilder.add_link("Method2", href='/myview/method2/john', category='My View')
appbuilder.add_link("Method3", href='/myview/method3/john', category='My View')

我发送了我的表单并执行了另一个python函数，它创建了一个包含表单发送内容的xls文件，但我不知道如何重定向到这个xls文件并下载它，这是具体的编码：

def form_post(self, form):
        # process form
        flash(as_unicode(form.field1.data), 'info')
        excelstuff(as_unicode(form.field1.data))
        return redirect(url_for('myview.download', filename='demo.xlsx'))

有人可以帮助我吗？

Answer 1

你有两个问题。

1 - url_for是区分大小写的，所以这样做：

return redirect(url_for('MyView.download', filename='demo.xlsx'))

2 - SimpleFormView.form_post仅用于表单处理，答案由框架做出，所以在这种情况下你应该覆盖'this_form_post'

@expose("/form", methods=['POST'])
@has_access
def this_form_post(self):
    self._init_vars()
    form = self.form.refresh()

    if form.validate_on_submit():
        flash(as_unicode(form.field1.data), 'info')
        excelstuff(as_unicode(form.field1.data))
        return redirect(url_for('MyView.download', filename='demo.xlsx'))
    else:
        widgets = self._get_edit_widget(form=form)
        return self.render_template(
            self.form_template,
            title=self.form_title,
            widgets=widgets,
            appbuilder=self.appbuilder
        )

我没有测试过，告诉我它是否有用。

尝试重定向表单时Flask-appbuilder问题

1 个答案: