如何使用Pymongo在MongoDB中选择单个字段? [英] How to select a single field in MongoDB using Pymongo?

问题描述

我正在尝试在MongoDB中查找一条记录，并从结果中过滤_id.

I'm trying to find a record within MongoDB, and filter _id from the result.

这是我的代码:

#app.py
@app.route('/login', methods = ['GET', 'POST'])
def login():
    if request.method == "POST":
        password = request.form.get('password')
        email = request.form.get('email')
        db = get_db()
        data = db.author.find_one({'email' : email, 'password' : password})
        print(data)
        return 'data'
    else:
        return render_template('login.html')

输出:

{'password': '123123', 'name': '<my_name>', 'email': '<my_email>', '_id': ObjectId('<an_object_id_string>')}

如何从输出中过滤_id字段?

How do I filter the _id field from the output?

推荐答案

您需要使用投影指定要返回的字段.

You need to specify the field you want to return using projection.

data = db.author.find_one({'email' : email, 'password' : password}, {'_id': 1})

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