在帖子下显示评论的聪明方法是什么？

Question

我目前可以写我的帖子和对我的数据库的回复，但现在我被困在如何显示我对我的特定帖子的回复以及如何显示帖子下有 cmets 的帖子。任何提示都有助于特别指出有关此类问题的正确文档。

routes.py

@app.route("/post/new", methods=['GET', 'POST'])
@login_required
def new_post():
    form = PostForm()
    if form.validate_on_submit():
        post = Post(title=form.title.data, content=form.content.data, author=current_user,)
        db.session.add(post)
        db.session.commit()
        flash('New Post Created', 'success')
        return redirect(url_for('home'))
    return render_template('create_post.html', title='New Post', form=form, legend='New Post')


@app.route("/post/<int:post_id>")
def post(post_id):
    post = Post.query.get_or_404(post_id)
    return render_template('post.html', title=post.title, post=post,)


@app.route("/post/reply", methods=['GET', 'POST'])
@login_required
def new_reply():
    form = ReplyForm()
    if form.validate_on_submit():
        reply = Reply(title=form.title.data, content=form.content.data, author=current_user,)
        db.session.add(reply)
        db.session.commit()
        flash('reply posted', 'success')
        return redirect(url_for('home'))
    return render_template('Reply.html', title='New Reply', form=form, legend='New Reply')

post.html

{% block content %}
  <article class="media content-section">
    <img class="article-img" src="{{ url_for('static', filename='profile_pics/' + post.author.image_file) }}">
    <div class="media-body">
      <div class="article-metadata">
        <a class="mr-2" href="{{ url_for('user_posts', username=post.author.username) }}">{{ post.author.username }}</a>
        <small class="text-muted">{{ post.date_posted}}</small>
        {% if post.author == current_user %}
          <div>
            <a class="btn btn-secondary btn-sm mt-1 mb-1" href="{{ url_for('update_post', post_id=post.id) }}">[ Update ]</a>
            <a class="btn btn-secondary btn-sm mt-1 mb-1" href="{{ url_for('new_reply', post_id=post.id) }}">[ Reply ]</a>
            <a class="btn btn-secondary btn-sm mt-1 mb-1" href="{{ url_for('delete_post', post_id=post.id) }}">[ Delete ]</a>
          </div>
        {% else %}
        {% if current_user.is_authenticated %}
        <div>
        <a class="btn btn-secondary btn-sm mt-1 mb-1" href="{{ url_for('new_reply', post_id=post.id ) }}">[ Reply ]</a>
        </div>
        {% endif %}
        {% endif %}
      </div>
      <h2 class="article-title">{{ post.title }}</h2>
      <p class="article-content">{{ post.content }}</p>
    </div>
  </article>
{% endblock content %}

Answer 1

如果您修改模型以多对一关系连接 cmets 和帖子，则可以实现此目的。 （很多cmet都和一个帖子有关）

---

from app         import db
from flask_login import UserMixin
from datetime    import datetime

class User(UserMixin, db.Model):
    id       = db.Column(db.Integer,     primary_key=True)
    username = db.Column(db.String(64),  unique = True)
    email    = db.Column(db.String(120), unique = True)
    password = db.Column(db.String(500))

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)
    user_id     = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)

class Reply(db.Model):
    id          = db.Column(db.Integer, primary_key=True)
    post_id     = db.Column(db.Integer, db.ForeignKey('post.id'), nullable=False)
    user_id     = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
    content     = db.Column(db.Text, nullable=False)
    date_posted = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
    

现在您可以通过使用post_id 简单地查询回复表来获取帖子的所有回复

from .models import Reply

replies = Reply.query.filter_by(post_id=`your_post_id_here').all()

---

您可以获取 replies 列表并将其呈现在模板中

Answer 2

• 定义一个名为 cmets 的表
• 将关系 post-cmets 定义为一对多，并带有适当的反向引用
• 在每个帖子下做：

{%for comment in post.comments%}

{%endfor%}