我现在有一个很好的 HTML 表单，可以通过按钮调用方法。我想要做的是创建几个调用相同方法的新按钮，但每个按钮传递不同的参数。具体用例是：我的按钮现在使用 get_random_album() 检索随机相册。我想制作“爵士”、“古典”和“摇滚”音乐分别调用 get_random_album(genre=<genre>). 的按钮移动平均维数：from flask import Flask,redirect# Below import commented out for MVE# from discogs import get_random_album# TODO: look at more advanced form builders# Create app instanceapp = Flask(__name__)# Create homepage with button@app.route("/")def home(): return """ <html><body> <h2> Spin yo records </h2> <form action="/query"> <input type='submit' value="I'm Feeling Lucky"> </body></html> """# Backend query to discogs@app.route("/query")def link(): # return redirect(get_random_album()) # Real implementation commented out # Scratch implementation here def get_random_album(genre=None): url = "https://www.google.com" if genre == 'Jazz': return url + "/search?q=jazz" if genre == 'Classical': return url + "/search?q=classical" if genre == 'Rock': return url + "/search?q=rock" return url return redirect(get_random_album())# Run appif __name__ == "__main__": app.run(debug=True,port=600)实际项目
1 回答
胡子哥哥
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首先创建具有相同name但不同的按钮value
@app.route("/")
def home():
return """
<html>
<body>
<h2> Spin yo records </h2>
<form action="/query">
<input type="submit" name="selected_genre" value="Jazz">
<input type="submit" name="selected_genre" value="Classic">
<input type="submit" name="selected_genre" value="Rock">
<input type="submit" name="selected_genre" value="I'm Feeling Lucky">
</form>
</body>
</html>
"""
接下来，您可以使用 和按钮中使用的名称来选择valuerequest
from flask import request
import random
@app.route("/query")
def link():
allowed_values = ('Jazz', 'Classic', 'Rock')
genre = request.args.get("selected_genre")
# "I'm Feeling Lucky"
if genre not in allowed_values:
genre = random.choice(allowed_values)
genre = genre.lower()
url = f"https://www.google.com/search?q={genre}"
return redirect(url)
完整示例
from flask import Flask, redirect, request
import random
app = Flask(__name__)
@app.route("/")
def home():
return """
<html>
<body>
<h2> Spin yo records </h2>
<form action="/query">
<input type="submit" name="selected_genre" value="Jazz">
<input type="submit" name="selected_genre" value="Classic">
<input type="submit" name="selected_genre" value="Rock">
<input type="submit" name="selected_genre" value="I'm Feeling Lucky">
</form>
</body>
</html>
"""
@app.route("/query")
def link():
allowed_values = ('Jazz', 'Classic', 'Rock')
genre = request.args.get("selected_genre")
if genre not in allowed_values:
genre = random.choice(allowed_values)
genre = genre.lower()
url = f"https://www.google.com/search?q={genre}"
return redirect(url)
if __name__ == "__main__":
app.run(debug=True,port=600)
在以前的版本中，它在 url 中发送 value ，即。 /query?selected_genre=Rock - 这样每个人都可以看到它，或者很容易它可以尝试使用自己的价值。这就是为什么我使用 allowed_values 来阻止它。
要从 url 中隐藏选定的流派，您必须使用：
<form ... method="POST">@app.route(..., methods=['GET', 'POST'])（或methods=['POST']）request.form代替request.args
完整示例
from flask import Flask, redirect, request
import random
app = Flask(__name__)
@app.route("/")
def home():
return """
<html>
<body>
<h2> Spin yo records </h2>
<form action="/query" method="POST">
<input type="submit" name="selected_genre" value="Jazz">
<input type="submit" name="selected_genre" value="Classic">
<input type="submit" name="selected_genre" value="Rock">
<input type="submit" name="selected_genre" value="I'm Feeling Lucky">
</form>
</body>
</html>
"""
@app.route("/query", methods=['GET', 'POST'])
def link():
allowed_values = ('Jazz', 'Classic', 'Rock')
genre = request.form.get("selected_genre")
if genre not in allowed_values:
genre = random.choice(allowed_values)
genre = genre.lower()
url = f"https://www.google.com/search?q={genre}"
return redirect(url)
if __name__ == "__main__":
app.run(debug=True, port=600)
如果您想在按钮上使用不同的文本但仍发送相同的value，那么您可能需要隐藏 <input> 和 value 但是每个按钮都需要分开 <form>
@app.route("/")
def home():
return """
<html>
<body>
<h2> Spin yo records </h2>
<form action="/query" method="POST">
<input type="hidden" value="Jazz" name="selected_genre">
<input type="submit" value="The Best Jazz Music">
</form>
<form action="/query" method="POST">
<input type="hidden" value="Classic" name="selected_genre">
<input type="submit" value="The Best Classic Music">
</form>
<form action="/query" method="POST">
<input type="hidden" value="Rock" name="selected_genre">
<input type="submit" value="The Best Rock Music">
</form>
<form action="/query" method="POST">
<input type="hidden" value="random" name="selected_genre">
<input type="submit" value="I'm Feeling Lucky">
</form>
</body>
</html>
"""
或者您必须使用 <button> 而不是 <input>
@app.route("/")
def home():
return """
<html>
<body>
<h2> Spin yo records </h2>
<form action="/query" method="POST">
<button type="submit" name="selected_genre" value="Jazz">The Best Jazz Music</button>
<button type="submit" name="selected_genre" value="Classic">The Best Classic Music</button>
<button type="submit" name="selected_genre" value="Rock">The Best Rock Music</button>
<button type="submit" name="selected_genre" value="random">I'm Feeling Lucky</button>
</form>
</body>
</html>
"""
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