我目前正在努力為我的 flaskblog 中的帖子添加圖片這是我的 routes.py 導入和 new_post 函數(shù)和路由import osimport secretsfrom PIL import Imagefrom flask import render_template, url_for, flash, redirect, request, abortfrom flaskblog import app, db, bcryptfrom flaskblog.forms import RegistrationForm, LoginForm, UpdateAccountForm, PostFormfrom flaskblog.models import User, Postfrom flask_login import login_user, current_user, logout_user, login_required@app.route("/post/new", methods=['GET', 'POST'])@login_requireddef new_post():    form = PostForm()    if form.validate_on_submit():        if form.post_picture.data:            image_post = form.post_picture.data        post = Post(title=form.title.data, content=form.content.data, author=current_user, post_image=image_post)        db.session.add(post)        db.session.commit()        flash('Your post has been created!', 'success')        return redirect(url_for('home'))    return render_template('create_post.html', title='New Post', post_image=post_image,                           form=form, legend='New Post')這是我的 forms.py 導入和 PostForm 類from flask_wtf import FlaskFormfrom flask_wtf.file import FileField, FileAllowedfrom flask_login import current_userfrom wtforms import StringField, PasswordField, SubmitField, BooleanField, TextAreaFieldfrom wtforms.validators import DataRequired, Length, Email, EqualTo, ValidationErrorfrom flaskblog.models import Userclass PostForm(FlaskForm):    title = StringField('Title', validators=[DataRequired()])    content = TextAreaField('Content', validators=[DataRequired()])    post_picture = FileField('Add image to your post', validators=[FileAllowed(['jpg', 'png'])])    submit = SubmitField('Post')這是我的 models.py 文件和 Post 類from datetime import datetimefrom flaskblog import db, login_managerfrom flask_login import UserMixin