如何在flask Admin中上传多个镜像

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class Image(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100))
    file_path = db.Column(db.String(255))

from flask_admin.contrib.sqla import ModelView
from wtforms import FileField
from werkzeug.utils import secure_filename

class ImageUploadView(ModelView):
    form_extra_fields = {
        'file': FileField('Image')
    }

    def on_model_change(self, form, model, is_created):
        if form.file.data:
            file = form.file.data
            filename = secure_filename(file.filename)
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            model.file_path = os.path.join(app.config['UPLOAD_FOLDER'], filename)

admin = Admin(app, name='Flask Admin', template_mode='bootstrap3')
admin.add_view(ImageUploadView(Image, db.session))

app.config['UPLOAD_FOLDER'] = '/path/to/upload/folder'