How to use the Webman framework to implement online Q&A and knowledge base functions?

Webman is a Python-based Web development framework. It is simple to use, powerful, and suitable for quickly building various Web applications. This article will introduce how to use the Webman framework to implement a simple online Q&A and knowledge base function. The following are the specific steps:

Step 1: Environment setup
First, we need to install the Webman framework. It can be installed through the pip command. Open the terminal and enter the following command:

pip install webman

After successful installation, we can start writing code.

Step 2: Create projects and applications
Enter the following command in the command line to create a project named "question_answer":

webman createproject question_answer
cd question_answer

Then we create a project named " qa" application:

webman createapp qa

Next, we enter the qa application directory:

cd qa

Step 3: Design the database model
Create a file named models.py in the qa directory File, used to design the database model. We can create models using the ORM functionality built into the Webman framework. The following is a simple model example:

from webman import db

class Question(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100))
    content = db.Column(db.Text)
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())

class Answer(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    question_id = db.Column(db.Integer, db.ForeignKey('question.id'))
    content = db.Column(db.Text)
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())

The above code defines two models, Question and Answer. The Question model is used to store the title, content and creation time of the question, and the Answer model is used to store the content and creation time of the answer. The Question model and the Answer model are related through question_id. Specific database configuration can be set in the project's settings.py file.

Step 4: Write view functions and routing
Create a file named views.py in the qa application directory for writing view functions. We can use the built-in view decorator of the Webman framework to define routes. The following is a simple view function example:

from webman import app, db
from .models import Question, Answer

@app.route('/')
def index():
    questions = Question.query.all()
    return render_template('index.html', questions=questions)

@app.route('/question/<int:question_id>')
def question_detail(question_id):
    question = Question.query.get(question_id)
    answers = question.answers
    return render_template('question_detail.html', question=question, answers=answers)

@app.route('/answer/<int:answer_id>/edit', methods=['GET', 'POST'])
def edit_answer(answer_id):
    answer = Answer.query.get(answer_id)
    if request.method == 'POST':
        answer.content = request.form['content']
        db.session.commit()
        return redirect(url_for('question_detail', question_id=answer.question_id))
    return render_template('edit_answer.html', answer=answer)

The above code defines three view functions, which are used to display the Q&A home page, question details, and edit answers. The index function is used to obtain all questions and return them to the template, the question_detail function is used to find the questions and answers with the specified id and return them to the template, and the edit_answer function is used to edit the answers with the specified id.

Step 5: Write template files
Create a folder named templates in the qa application directory to store template files. The following is a simple template file example:

index.html

{% for question in questions %}
    <h3>{{ question.title }}</h3>
    <p>{{ question.content }}</p>
{% endfor %}

question_detail.html

<h3>{{ question.title }}</h3>
<p>{{ question.content }}</p>
{% for answer in answers %}
    <p>{{ answer.content }}</p>
{% endfor %}

edit_answer.html

<form action="{{ url_for('edit_answer', answer_id=answer.id) }}" method="post">
    <textarea name="content">{{ answer.content }}</textarea>
    <input type="submit" value="保存">
</form>

The above code defines three Template files are used to display the Q&A home page, question details and edit answer pages respectively.

Step 6: Run the application
Enter the following command on the command line to run the application:

webman runserver

Enter http://localhost:5000 in the browser to access the application.

So far, we have successfully implemented a simple online Q&A and knowledge base function using the Webman framework. Through the above steps, readers can quickly get started with the Webman framework and flexibly apply it in actual projects.

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