图像未保存在 flask-admin

如何解决图像未保存在 flask-admin

我有 2 个尝试使用 flask-admin 将图像保存到数据库的示例。图像从 PC 的管理面板中上传。图像必须默认保存在烧瓶静态文件夹 ('/static') 中。数据库存储姓名和全名（姓名+扩展名）

第一个示例完美运行。

example1.py

import os
from flask import Flask,url_for
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.event import listens_for
from jinja2 import Markup
from flask_admin import Admin,form
from flask_admin.contrib.sqla import ModelView


def create_app():
    app = Flask(__name__)
    app.config['SECRET_KEY'] = os.environ['SECRET_KEY']
    app.config['DATABASE_FILE'] = 'Website.sqlite'
    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + \
        app.config['DATABASE_FILE']
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
    app.config['FLASK_ADMIN_SWATCH'] = 'cerulean'
    db.init_app(app)
    admin.init_app(app)
    return app


db = SQLAlchemy()
admin = Admin(name='Example: Forms',template_mode='bootstrap4')
app = create_app()
file_path = os.path.join(os.getcwd(),'static')


class Image(db.Model):
    id = db.Column(db.Integer,primary_key=True)
    name = db.Column(db.Unicode(64))
    path = db.Column(db.Unicode(128))


@listens_for(Image,'after_delete')
def del_image(mapper,connection,target):
    if target.path:
        try:
            os.remove(os.path.join(file_path,target.path))
        except OSError:
            pass
        try:
            os.remove(os.path.join(file_path,form.thumbgen_filename(target.path)))
        except OSError:
            pass


class ImageView(ModelView):
    def _list_thumbnail(view,context,model,name):
        if not model.path:
            return ''

        return Markup('<img src="%s">' % url_for('static',filename=form.thumbgen_filename(model.path)))

    column_formatters = {
        'path': _list_thumbnail
    }
    form_extra_fields = {
        'path': form.ImageUploadField('Фотка',base_path=file_path,thumbnail_size=(100,100,True))
    }


admin.add_view(ImageView(Image,db.session))


@app.route('/')
def index():
    return '<a href="/admin/">Click me to get to Admin!</a>'


def create_db():
    db.drop_all()
    db.create_all()


if __name__ == '__main__':
    app.run(debug=True)

但是，由于某些原因，由多个文件组成的第二个示例不起作用。它不保存图像。

app.py

from main import create_app
app = create_app()

if __name__ == '__main__':
    app.run(debug=True,port='4000')

ma​​in.py

from datetime import datetime
from flask_login import UserMixin
import os
from flask import Flask,form
from flask_admin.contrib.sqla import ModelView

file_path = op.join(os.getcwd(),'static')
db = SQLAlchemy()
admin = Admin(name='Website Admin',template_mode='bootstrap4')


def create_app():
    app = Flask(__name__)
    app.config['SECRET_KEY'] = os.environ['SECRET_KEY']
    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///website.sqlite'
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
    app.config['FLASK_ADMIN_SWATCH'] = 'cerulean'
    db.init_app(app)
    admin.init_app(app)
    return app

class Image(db.Model):
    id = db.Column(db.Integer,target):
    if target.path:
        try:
            os.remove(op.join(file_path,target.path))
        except OSError:
            pass

        try:
            os.remove(op.join(file_path,filename=form.thumbgen_filename(model.path))))

    column_formatters = {
        'path': _list_thumbnail
    }
    form_extra_fields = {
        'path': form.ImageUploadField('Image',db.session))

名称已保存到数据库中，但图像未保存。我究竟做错了什么？如何修复第二个示例？ 这些可能会有所帮助： File and Image Fields in Flask-admin