小编Mar*_*ngs的帖子

我试图根据用户之前所做的选择来限制下拉列表中的选择。这就是我的烧瓶的样子：

初始化.py

@app.route('/create/', methods=['GET','POST'])
def create():
    mySQL2 = SelectCustomer(session['ID']) #displayed invoicereceiver
    global sessioncur
    try:
        form = CreateinvoiceForm(request.form)
        if request.method == 'POST' and form.validate():
            #HEADER
            #This fetches from HTML
            customer = request.form.get('customer')
            goodsrec = request.form.get('goodsrec')
    return render_template("createinvoice.html", form=form,  mySQL2 = mySQL2)

使用 mySQL2 作为可能的变量从 html 表单中填充客户以供选择：

<select required name="customer" class="selectpicker form-control" , 
placeholder="Select">
<option selected="selected"></option>
{% for o in mySQL2 %}      
<option value="{{ o[2] }}">{{ o[2] }}</option>  
{% endfor %}
</select>

c, conn …