Question

我正在学习Flask，并且想做一个简单的发票应用程序，但是我不知道如何返回包含以下内容的表中的所有数据行：四个字段{code, description, price, quantity}将作为我的数据库表的详细信息插入或更新。

这只是一个代码示例。

# app.py
from flask import Flask, request, redirect, url_for, render_template
from flask_wtf import FlaskForm
from wtforms import StringField, IntegerField, DecimalField


app = Flask(__main__)

def save_invoice_det():
    # Here i'll iterate all rows got from the table
    pass


class DetailForm(FlaskForm):
    item_code = IntegerField('Item Code')
    item_desc = StringField('Description')
    quantity = DecimalField('Qty')
    price = DecimalField('Price', places=2)
    total = DecimalField('Total', places=2)


@app.route('/invoice', methods=['GET', 'POST'])
def invoice(number):
    form = DetailForm()

    # This is just example models table
    query_det = Details_Inv.query.get(number)

    if request.method == 'POST':

        # Here i need to know how to get all row from the table
        if form.validate_on_submit():
            save_invoice_det()
        return redirect(url_for('list_invoices'))

    return render_template('invoice.html', details=query_det)


if name == '__main__':
    app.run(debug=True)


# invoice.html
<!DOCTYPE html>
<html lang='en'>
    <head>
        <meta charset='UTF-8'>
        <title>Create / Edit Invoice</title>
     </head>

    <body>
        <form method='POST'>
            <table>  <!-- This table with is what i want to return back in a request -->
                <thead>
                    <tr>
                        <th>Item Code</th>
                        <th>Item Descripction</th>
                        <th>Quantity</th>
                        <th>Price</th>
                        <th>Total</th>
                    </tr>
                </thead>

                <tbody>
                    {% for detail in details %}
                        <tr>
                            <td>{{ detail.item_code }}</td>
                            <td>{{ detail.item_desc }}</td>
                            <td>{{ detail.quantity }}</td>
                            <td>{{ detail.price }}</td>
                            <td>{{ detail.total }}</td>
                        </tr>
                    {% endfor %}
                 </tbody>
            </table>
        </form>
    </body>

</html>

Answer 1

首先，如果我没记错的话，我想你想通过表单对象details=form。无论如何，我都没有all（）方法，但是您可以在下面找到类似的内容，

if form.validate_on_submit():
        save_invoice_det(form) # pass your form object

在辅助功能中，您可以看到以下内容，

attrs = vars(form)
for attr in attrs:
    if 'csrf_token' in attr:
        continue
    try:
        print(f'for {attr} field data is {getattr(form, attr).data}')
    except:
        pass

基本上getattr(form, attr).data是您的解决方案。

编辑：我正在使用python 3.7根据您的需要进行调整

编辑：在查看我的答案时，您也可以看到类似下面的内容，

from flask_wtf import FlaskForm
from wtforms import StringField, IntegerField, DecimalField
from flask import Flask
from collections import OrderedDict

app = Flask(__name__)
app.secret_key = b'_5#y2L"F4Q8z\n\xec]/'

class CustomFlaskForm(FlaskForm):
    ignore_field = ['csrf_token']

    def all(self):
        val = OrderedDict()
        attrs = vars(self)
        for attr in attrs:
            if attr in self.ignore_field:
                continue
            try:
                val[attr] = getattr(self, attr).data
            except Exception as err:
                pass
        return val


class DetailForm(CustomFlaskForm):
    def __init__(self):
        super(DetailForm, self).__init__()
        self.ignore_field.append('total')

    item_code = IntegerField('Item Code')
    item_desc = StringField('Description')
    quantity = DecimalField('Qty')
    price = DecimalField('Price', places=2)
    total = DecimalField('Total', places=2)

with app.test_request_context() as app:
    form = DetailForm()
    print(form.all())

，输出为： OrderedDict([('item_code', None), ('item_desc', None), ('quantity', None), ('price', None)])

Python Flask如何从请求表中的html表中获取所有记录

1 个答案: