wtforms-将fieldlist数据写入mysql

u91tlkcl  于 2021-06-18  发布在  Mysql
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假设我有这样一个表格:

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,比如 Toy1=form.Toys[1].data ,如何聚合表单提交中的所有字段列表数据,以便写入sql表,如:?

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

为了简单起见,我设置了 min_entries=5 对于所有字段。我尝试使用for循环将列名和值附加到字典中,并将其写入数据库,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,每次遇到错误时,它都会写入数据库 Fieldlist ,生成如下表:

Toys | Fruits | Jewelry | Candy
ball   NULL       NULL     NULL
ball   apple      NULL     NULL
ball   apple     Necklace  NULL
ball   apple     Necklace  M&Ms
l5tcr1uw

l5tcr1uw1#

我对这个问题的理解是,您有一个表单中的条目列表,您希望将这些条目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)

给它(或一些调试过的衍生工具!)一次尝试

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