PeeWee ORM 报告 table 已经存在

Question

我有以下代码

db = peewee.SqliteDatabase(":memory:")

class CategoryProduct(peewee.Model):
    category_code    = peewee.CharField()
    product_code     = peewee.CharField()
    product_order    = peewee.CharField()
    default_category = peewee.CharField()

    def __str__(self):
        return "({0}, {1})".format(self.category_code, self.product_code)

db.connect()
db.create_tables([CategoryProduct])

当我运行我得到的脚本时

('CREATE TABLE "categoryproduct" ("id" INTEGER NOT NULL PRIMARY KEY, "category_code" VARCHAR(255) NOT NULL, "product_code" VARCHAR(255) NOT NULL, "product_order" VARCHAR(255) NOT NULL, "default_category" VARCHAR(255) NOT NULL)', [])
Traceback (most recent call last):
  File "/Users/daniels/Work/sandbox/venv/lib/python3.5/site-packages/peewee.py", line 3676, in execute_sql
    cursor.execute(sql, params or ())
sqlite3.OperationalError: table "categoryproduct" already exists

知道发生了什么事吗？如果我创建任何其他模块它工作正常但不知何故它不喜欢这个名字。

Answer 1

文档为您提供了注释：

注意：请记住在您的模型 classes 上指定一个数据库，否则 peewee 将回退到名为“peewee.db”的默认 sqlite 数据库。

只需将数据库添加到您的 class

class BaseModel(peewee.Model):
    class Meta:
        database = db 



class CategoryProduct(BaseModel):
    category_code    = peewee.CharField()
    product_code     = peewee.CharField()
    product_order    = peewee.CharField()
    default_category = peewee.CharField()

    def __str__(self):
        return "({0}, {1})".format(self.category_code, self.product_code)

PeeWee ORM 报告 table 已经存在

PeeWee ORM reports that table already exists

python-3.x

peewee