"anyOf": [{"type": "boolean"}, {"type": "null"}],
                                    "title": "Img",
                                }
                            )
                            | IsDict(
                                # TODO: remove when deprecating Pydantic v1
                                {"title": "Img", "type": "boolean"}
                            ),

                        {
                            "required": False,
                            "schema": {
                                "title": "Teleport",
                                "type": "boolean",
                                "default": False,
                            },
                            "name": "teleport",
                            "in": "query",
                        }

                                "anyOf": [{"type": "boolean"}, {"type": "null"}],
                            }
                        )
                        | IsDict(
                            # TODO: remove when deprecating Pydantic v1
                            {"title": "Disabled", "type": "boolean"}
                        ),
                    },
                },

                                "anyOf": [{"type": "boolean"}, {"type": "null"}],
                            }
                        )
                        | IsDict(
                            # TODO: remove when deprecating Pydantic v1
                            {"title": "Disabled", "type": "boolean"}
                        ),
                    },
                },

这个`__tablename__`属性是用来告诉 SQLAlchemy 要在数据库中为每个模型使用的数据库表的名称。

### 创建模型属性/列

现在创建所有模型（类）属性。

这些属性中的每一个都代表其相应数据库表中的一列。

我们使用`Column`来表示 SQLAlchemy 中的默认值。

我们传递一个 SQLAlchemy “类型”，如`Integer`、`String`和`Boolean`，它定义了数据库中的类型，作为参数。

```Python hl_lines="1  10-13  21-24"
{!../../../docs_src/sql_databases/sql_app/models.py!}
```

### 创建关系

现在创建关系。

为此，我们使用SQLAlchemy  ORM提供的`relationship`。

                        "email": {"title": "Email", "type": "string"},
                        "id": {"title": "Id", "type": "integer"},
                        "is_active": {"title": "Is Active", "type": "boolean"},
                        "items": {
                            "title": "Items",
                            "type": "array",
                            "items": {"$ref": "#/components/schemas/Item"},

                        "email": {"title": "Email", "type": "string"},
                        "id": {"title": "Id", "type": "integer"},
                        "is_active": {"title": "Is Active", "type": "boolean"},
                        "items": {
                            "title": "Items",
                            "type": "array",
                            "items": {"$ref": "#/components/schemas/Item"},

from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
from sqlalchemy.orm import relationship

from .database import Base


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True)
    email = Column(String, unique=True, index=True)
    hashed_password = Column(String)
    is_active = Column(Boolean, default=True)

    items = relationship("Item", back_populates="owner")

                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "boolean"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],
                }
            },

                        "paid": {"title": "Paid", "type": "boolean"},
                    },
                },
                "InvoiceEventReceived": {
                    "title": "InvoiceEventReceived",
                    "required": ["ok"],
                    "type": "object",
                    "properties": {"ok": {"title": "Ok", "type": "boolean"}},
                },
                "ValidationError": {