如果你不知道,这是cs50 pset
{% extends "layout.html" %}
{% block title %}
Log In
{% endblock %}
{% block main %}
<form method="post">
<div class="form-group">
<select class="custom-select" style="width: auto;" name="select">
<option value="" disabled selected>Symbol</option>
{% for stock in symbols %}
<option value={{ stock }}>{{ stock }}</option>
{% endfor %}
</select>
</div>
<div class="form-group">
<input class="form-control" name="shares" placeholder="Shares" type="text">
</div>
<button class="btn btn-primary" type="submit">Sell</button>
</form>
{% endblock %}
这是app.py
@app.route("/sell", methods=["GET", "POST"])
@login_required
def sell():
user = db.execute("SELECT username FROM users WHERE users.id=?", session['user_id'])[0]['username']
if request.method == "GET":
symbols = []
unfiltered_stocks = db.execute("SELECT symbol FROM purchases WHERE user=?", user)
for stock in unfiltered_stocks:
symbols.append(stock['symbol'])
return render_template("sell.html")
<>你可以考虑股票是一个数组,而不是空的输出仅是第一个占位符选项,仅此而已
当您调用
render_template()
时,您可以将Python变量传递给它,从而使它们在Jinja模板中可用将
return render_template("sell.html")
更改为return render_template("sell.html", symbols=symbols)
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