[英]How to add a comment feature Python Flask MySQL?
在我們開始之前,我是一個完整的初學者。 這是我目前能做的最好的。 我不知道從哪里開始向我的應用程序添加評論功能。 這就是我現在所擁有的 - 它並不多,但它有效。 這是我的 Python 代碼:
@app.route('/forum')
def forum():
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
cursor.execute("SELECT * FROM posts_announcements ORDER BY id DESC LIMIT 1")
last_post = cursor.fetchone()
if 'loggedin' in session:
return render_template('forum.html', last_post=last_post, username=session['username'])
return render_template('forum.html', last_post=last_post)
@app.route('/forum/announcements/posts/<id>', methods=['GET', 'POST'])
def post(id):
if 'loggedin' in session:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements WHERE id = %s", [id])
post = cursor.fetchone()
return render_template('post.html', post=post, username=session['username'])
else:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements WHERE id = %s", [id])
post = cursor.fetchone()
return render_template('post.html', post=post)
@app.route('/forum/announcements/desc/')
def announcements_desc():
page = request.args.get(get_page_parameter(), type=int, default=1)
limit = 20
offset = page*limit - limit
if 'loggedin' in session:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
cursor.execute("SELECT * FROM posts_announcements")
result = cursor.fetchall()
total = len(result)
cur = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
cur.execute("SELECT * FROM posts_announcements ORDER BY UNIX_TIMESTAMP(date_of_creation) DESC LIMIT %s OFFSET %s;", (limit, offset))
posts_announcements = cur.fetchall()
cur.close()
pagination = Pagination(page=page, per_page=limit, total=total, record_name='posts_announcements')
return render_template('announcements_desc.html', pagination=pagination, posts_announcements=posts_announcements, username=session['username'])
else:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements ORDER BY UNIX_TIMESTAMP(date_of_creation) DESC")
posts_announcements = cursor.fetchall()
return render_template('announcements_asc.html', posts_announcements=posts_announcements)
@app.route('/forum/announcements/asc')
def announcements_asc():
if 'loggedin' in session:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements ORDER BY UNIX_TIMESTAMP(date_of_creation) ASC")
posts_announcements = cursor.fetchall()
return render_template('announcements_asc.html',posts_announcements=posts_announcements, korisničkoime=session['korisničkoime'])
else:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements ORDER BY UNIX_TIMESTAMP(date_of_creation) ASC")
posts_announcements = cursor.fetchall()
return render_template('announcements_asc.html', posts_announcements=posts_announcements)
所以現在,我已經創建了帖子,我可以從論壇頁面訪問最后一個帖子。 我還添加了一個選項,可以在點擊時按降序和升序對我的帖子進行排序。 但這主要是 MySQL 代碼。 這是我的 HTML,這是我的論壇。html
<div class="forums-right-forum">
<div><a class="reveal_title" href="/forum/announcements/posts/{{ last_post.id }}">{{ last_post.title }}</a></div>
<span><a href="#">{{ last_post.author }}</a></span>
<p>{{ last_post.date_of_creation }}</p>
</div>
這是我的帖子。html
<div class="divmid-box-post">
<div class="date"><p>{{ post.date_of_creation }}</p></div>
<div class="user">
<a class="post_author" href="#">{{ post.author }}</a>
</div>
<div class="post" id="post">
<div class="message">{{ post.message | safe }}</div>
</div>
</div>
這是重定向到不同帖子的論壇頁面:
<div>
<ul>
<a class="post-title" href="/forum/announcements/posts/{{ post.id }}">{{ post.title }}</a>
<br>
Author:<a class="author" href="#"> {{ post.author }}</a><p>{{ post.date_of_creation }}</p>
</ul>
</div>
這一切都按預期工作,但現在我想在我的帖子中添加評論功能,但我不知道如何使用類。 我只有一個 main.py 文件,我所擁有的一切都在里面。 我只是希望有人指出我正確的方向,因為我經歷的每篇文章都與 SQLAlchemy 或其他不同的數據庫有關。 我相信解決方案可能非常簡單,但我就是不明白,正如我之前所說,我是一個完整的初學者。 提前致謝!
編輯:我試過這個,但它沒有按預期工作:
@app.route('/forum/announcements/posts/<id>', methods=['GET', 'POST'])
def post(id):
if 'loggedin' in session:
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result = cursor.execute("SELECT * FROM posts_announcements WHERE id = %s", [id])
post = cursor.fetchone()
cur = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
result1 = cur.execute("SELECT * FROM comments_announcements")
comment = cur.fetchall()
if request.method == 'POST' and 'comment' in request.form:
comment1 = bbcode.render_html(request.form['comment'])
author = session['username']
cursor = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
cursor.execute("INSERT INTO comments_announcements(message, author) VALUES (%s, %s)", (comment1, author))
mysql.connection.commit()
return render_template('post.html', post=post, comment=comment, username=session['username'])
return render_template('post.html', post=post, comment=comment, username=session['username'])
return render_template('post.html', post=post, comment=comment)
我將數據輸入數據庫,但我似乎無法通過 {{ comment.title }} {{ comment.author }} 或 {{ comment.message }} 在我的 html 中顯示它
我這樣做了,但它不起作用:
{% for comment in comments_announcements %}
<div class="divmid-box-comment">
<div class="date_of_creation"><p>{{ comment.date_of_creation }}</p></div>
<div class="author">
<a class="post_author" href="#">{{ comment.author }}</a>
</div>
<div class="post" id="post">
<div class="comment_message">{{ comment.message | safe }}</div>
</div>
</div>
{% endfor %}
在comment
中你有很多評論(也許你應該在最后使用帶有 s 的名稱)
在template
內部,您應該使用loop
來顯示所有評論。
{{ for c in comment }}
{{ c.title }}
{{ c.author }}
{{ c.message }}
{{ endfor }}
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