如果我的類別 == 學(xué)術(shù)（SelectField 選擇），我必須得到職位。但它不起作用（不顯示帖子）。如何為此獲取發(fā)布數(shù)據(jù)或表單數(shù)據(jù)？我試過(guò)了@categories.route("/category/academic")def academic():    page = request.args.get('page', 1, type=int)    posts = Post.query.order_by(        Post.date_posted.desc()).filter(        Post.category == "Academic").paginate(page=page, per_page=5)    return render_template('academic.html', posts=posts)和@categories.route("/category/academic")def academic():    form = PostForm()    page = request.args.get('page', 1, type=int)    post = Post(title=form.title.data,                content=form.content.data,                category=form.category.data)    posts = Post.query.order_by(        Post.date_posted.desc()).order_by(        post.category == "Academic").paginate(page=page, per_page=5)    return render_template('academic.html', posts=posts)和@categories.route("/category/academic")def academic():    page = request.args.get('page', 1, type=int)    posts = Post.query.order_by(        Post.date_posted.desc()).filter(        **PostForm**.category == "Academic").paginate(page=page, per_page=5)    return render_template('academic.html', posts=posts)后分類class Post(db.Model):    id = db.Column(db.Integer, primary_key=True)    title = db.Column(db.String(100), nullable=False)    date_posted = db.Column(db.DateTime, nullable=False,                            default=datetime.utcnow)    content = db.Column(db.Text, nullable=False)    category = db.Column(db.String(50))    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)PostForm.categoryclass PostForm(FlaskForm):    title = StringField('Title', validators=[DataRequired()])    content = TextAreaField('Content', validators=[DataRequired()])    category = SelectField('Category', validators=[DataRequired()], choices=[(        'Academic', 'Academic'), ('Art', 'Art')])    submit = SubmitField('Post')不起作用，因?yàn)樘游达@示。