Wtforms- 将字段列表数据写入 mysql

Question

假设我有这样的表格：

Toys= FieldList(TextField('what toys do you have?'),min_entries=5)
Fruits= FieldList(TextField('what fruits do you have?'),min_entries=5)
Jewelry= FieldList(TextField('what jewelries do you have?'),min_entries=5)
Candy= FieldList(TextField('what candies do you have?'),min_entries=5)

没有明确定义提交的值，例如 Toy1=form.Toys[1].data，我如何聚合表单提交中的所有 FieldList 数据以写入 SQL table，如下所示：？

Toys | Fruits | Jewelry | Candy
ball  apple    Necklace  M&Ms
stick orange   Bracelet  skittles
top   grapes   tie clip  lollipop

为了简单起见，我为所有字段设置了 min_entries=5。我尝试使用 for 循环将列名和值附加到字典中并将其写入我的数据库，如下所示：

field_dict=dict()
    for f in form:
        if str(f.type) in ['FieldList']:
            for x in range(1,5):
                field_dict.update({f.name:f.data[x]})
                    sql_insert="INSERT INTO tablename ({}) values ({})".format(
                        ",".join(field_dict.keys()),
                        ",".join('"' + str(value) + '"' for value in field_dict.values()))
                    c.execute(sql_insert)

但是，它每次遇到 Fieldlist 时都会写入数据库，导致 table 如：

 Toys | Fruits | Jewelry | Candy
ball   NULL       NULL     NULL
ball   apple      NULL     NULL
ball   apple     Necklace  NULL
ball   apple     Necklace  M&Ms

Answer 1

我对这个问题的理解是，您有一个表单中的条目列表，您希望将其组合成一个元组并插入到数据库中。

为了节省我的打字时间，假设您有：

# some list of keys obtained or hard coded as global..
KEYS = ['Toys', 'Fruits', 'Candy']

# and a form in which you have
Toys= FieldList(TextField('what toys do you have?'),min_entries=3)
Fruits= FieldList(TextField('what fruits do you have?'),min_entries=3)
Candy= FieldList(TextField('what candies do you have?'),min_entries=3)

现在你的工作是循环表单并打包一个元组：

form = Form()
for _i in range(3):
    tup = ()
    for key in KEYS:
        tup += (getattr(form, key)[_i].data,)
    sql = "INSERT INTO tablename ({}) values {}".format(
              ",".join(KEYS), str(tup))
    c.execute(sql)

试一试（或一些经过调试的衍生产品！）

Wtforms- 将字段列表数据写入 mysql

Wtforms- writing fieldlist data into mysql

mysql

for-loop

fieldlist

flask-wtforms