jinja2 相关问题

开始一个新项目，想要列出 sqlite 数据库的所有联系人。我使用flask、js、html和jinja2。我的 HTML 基于layout.html 开始一个新项目，想要列出 sqlite 数据库的所有联系人。我使用flask、js、html和jinja2。我的 HTML 基于layout.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}"> <title>Buchhaltung - {% block title %}{% endblock %}</title> </head> <body> <header> <nav class="menu"> <ul> <li><a href="{{ url_for('index') }}">Home</a></li> <li><a href="{{ url_for('list_addresses', starting_letter='ALL') }}">Kontakte</a></li> <li><a href="{{ url_for('list_invoices') }}">Rechnungen</a></li>   </ul> </nav> </header> <div class="content" id="content"> {% block content %}{% endblock %} </div> <footer> </footer> <script src="{{ url_for('static', filename='script.js') }}"></script> </body> </html>` 我的地址列表继承自这个layout.html `` ` {% extends 'layout.html' %}  {% block content %} <div> <h1>Kontakt Liste</h1> {% include 'address_filter.html' %} </div> <div> {% include 'address_result.html' %} </div> {% endblock %}` `` address_filter.html 包含一行从 a-z 的字母和一个用于过滤地址列表的复选框。 `` <div class="row"> <div class="starting-letters-row"> <button class="all-button" onclick="filterAddressesByStartingLetter('ALL')">ALLE</button> {% for letter in starting_letters %} <button onclick="filterAddressesByStartingLetter('{{ letter }}')">{{ letter }}</button> {% endfor %} </div> <div class="filter-active"> <label for="filter-active">Show Active only:</label> <input type="checkbox" id="filter-active" {% if filter_active != 'false' %}checked{% endif %} onchange="filterAddressesByStartingLetter('ALL')"> </div> </div> `` **address_result.html 保存结果表。 Flask 实现如下所示 ** from flask import Flask, render_template, g, request, send_from_directory import sqlite3 from datetime import datetime, timedelta app = Flask(__name__) # Function to get the database connection def get_db(): if 'db' not in g: g.db = sqlite3.connect('data/rechnung.db') g.cursor = g.db.cursor() return g.db, g.cursor # Close the database connection at the end of each request @app.teardown_appcontext def close_db(error): if 'db' in g: g.db.close() # Route to render the home page @app.route('/') def index(): return render_template('index.html') def addresses_retrieve_startLetter(): db, cursor = get_db() # Retrieve unique starting letters for names (active and inactive to define the maximum letter row) cursor.execute('SELECT DISTINCT substr(adr_name, 1, 1) FROM adressen ORDER BY substr(adr_name, 1, 1)' ) starting_letters = [letter[0] for letter in cursor.fetchall()] return starting_letters # Route to display addresses for a specific starting letter @app.route('/addresses/<starting_letter>', methods=['GET', 'POST']) def list_addresses(starting_letter): db, cursor = get_db() #Get the filter_active parameter from the URL filter_active = request.args.get('filter_active', type=bool) if filter_active == 'true' or filter_active is None: filter_active_arg = 1 else: filter_active_arg = 0 starting_letters = addresses_retrieve_startLetter() # Define Headers headers = ['Name', 'Vorname', 'Firma', 'Ort', 'eMail', 'Id'] # Retrieve addresses from the database for the selected starting letter # If starting_letter is 'ALL', retrieve all addresses if starting_letter.upper() == 'ALL': cursor.execute('SELECT adr_name, adr_vorname, adr_firma, adr_ort, adr_email, adr_id FROM adressen WHERE adr_aktiv = ? ORDER BY adr_name', (filter_active_arg,)) else: cursor.execute('SELECT adr_name, adr_vorname, adr_firma, adr_ort, adr_email, adr_id FROM adressen WHERE substr(adr_name, 1, 1) = ? and adr_aktiv =?', (starting_letter,filter_active_arg,)) addresses = cursor.fetchall() # app.logger.info(addresses) return render_template('list_addresses.html', starting_letters= starting_letters, headers=headers, addresses=addresses, filter_active=filter_active)` 当启动服务器并打开我的页面时，导航会显示一次。单击字母或复选框即可过滤列表导航会重复。 GIT COpilot 告诉我解决方案..我替换了整个页面，而不是仅替换了新更改的数据对象 fetch(`/addresses/${startingLetter}?filter_active=${filterActive}`) .then(response => response.text()) .then(html => { // Create a temporary div to hold the HTML response var tempDiv = document.createElement('div'); tempDiv.innerHTML = html; // Extract the 'addressList' part from the response var newAddressList = tempDiv.querySelector('#addressList'); // Replace the existing 'addressList' with the new one var oldAddressList = document.querySelector('#content #addressList'); oldAddressList.parentNode.replaceChild(newAddressList, oldAddressList); }) .catch(error => console.error('Error:', error)); };

html flask jinja2

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python flask download jinja2 wtforms

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