# 介绍

## 简介

模式（Schema）描述了图中一个实体类型，比如 `User` 或 `Group`，并且可以包含以下配置：

* 字段（或属性），例如：`User` 的姓名或年龄。
* 边（或关系），例如：`User` 的群组或 `User` 的朋友。
* 数据库特定的选项，例如：索引和唯一索引。

\
 这里有一个模式的例子：

```go
package schema

import (
    "github.com/facebookincubator/ent"
    "github.com/facebookincubator/ent/schema/field"
    "github.com/facebookincubator/ent/schema/edge"
    "github.com/facebookincubator/ent/schema/index"
)

type User struct {
    ent.Schema
}

func (User) Fields() []ent.Field {
    return []ent.Field{
        field.Int("age"),
        field.String("name"),
        field.String("nickname").
            Unique(),
    }
}

func (User) Edges() []ent.Edge {
    return []ent.Edge{
        edge.To("groups", Group.Type),
        edge.To("friends", User.Type),
    }
}

func (User) Index() []ent.Index {
    return []ent.Index{
        index.Fields("age", "name").
            Unique(),
    }
}
```

实体的模式通常存储在你项目根目录下的 `ent/schema` 目录下，可以使用 `entc` ，通过下面的命令生成：

```
entc init User Group
```

## ent 只是又一个 ORM

如果您习惯通过边定义关系，这很好。建模是相同的。您可以像使用其他传统 ORM 一样使用 `ent` 进行建模。 这里有很多示例，可以帮助您从 [边](https://3ks.gitbook.io/ent-zh_cn/schema/schema-edges) 部分开始。


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