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，我该如何汇总表单提交中的所有FieldList数据，以便像这样写到SQL表中？

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

为简单起见，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，然后像这样将其写入数据库：

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时都会将其写入数据库，从而产生如下表：

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

Answer 1

我对问题的理解是，您有一个表单中的条目列表，想要合并到一个元组中并插入数据库。

要为我节省一些打字时间，请说您拥有：

# 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)

现在您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)

尝试一下（或调试的派生工具！）

Wtforms-将FieldList数据写入mysql

1 个答案: