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我用 python、flask、mongodb 和 bootstrap 编写了一个博客网络应用程序。在我的工作中,如果我选择一篇文章,程序必须进入数据库,找到所选文章的相应ID,并将文章的内容渲染到指定的html文件中。这是路线的代码示例:

# Home with articles displayed
@app.route('/home', methods=['GET','POST'])
def article():

    # Create Mongodb connection
    user = mongo.db.articles
    # Execute query to fetch data
    results = user.find() 

    # Iterate the data retrieved
    if results is not None:
        articles = results
        return render_template("index.html", articles=articles)
    else:
        msg = Markup("<h3>No Articles Posted.</h3>")
        return render_template("index.html", msg=msg)


# Single Article
@app.route('/home/<id>/', methods=['GET','POST'])
def post(id):
    # Create Mongodb Connection
    user = mongo.db.articles
    # execute query
    article = user.find_one({'_id': id})

    return render_template("post.html", article=article) 

这也是 HTML 文件的代码示例:

{% extends 'base.html' %}

{% block title %} <title>Articles | Blog</title> {% endblock %}

{% block content %}

  <!-- Page Header -->
    <div class= "jumbotron">
        <h5>{{article.title}}</h5>
        <small>Written by Mr. Boss on {{article.date}} </small>
        <hr>
        <p class="lead">{{article.body}}</p>
      </div>


  <!-- Post Content -->

{% endblock %}

当我选择文章时页面呈现正常,但问题是它没有将信息从 mongodb 呈现到 html 文件。这是json中的mongodb数据:

{
  "_id": ObjectId("5c79d99195eded2364b03813"),
  "title":"Article One",
  "body":"This is the first article",
  "date":"2019-03-02T00:00:00.000Z"
}

拜托,我是python的初学者,所以如果我犯了任何错误,请放轻松,并帮助我解决这个问题。谢谢。

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1 回答 1

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我通过以下方式解决了这个问题: 1. 导入from bson.objectid import ObjectId 2. 将路线更改为:

# Single Article
@app.route('/home/<string:id>/', methods=['GET','POST'])
def post(id):
    # Create Mongo Connection
    user = mongo.db.articles

    # execute query
    article = user.find_one({"_id": ObjectId(id)})

    return render_template("post.html", article=article)
于 2019-03-02T03:51:42.530 回答