top.onceio.core.db.annotation

注释类型 Col

@Target(value={METHOD,FIELD})
 @Retention(value=RUNTIME)
public @interface Col

可选元素概要

可选元素

限定符和类型	可选元素和说明
String	comment
String	defaultValue
String	name
boolean	nullable
String	pattern
int	precision (Optional) The precision for a decimal (exact numeric) column.
Class<?>	ref 如果该类标注@Model则说明表示。
int	scale (Optional) The scale for a decimal (exact numeric) column.
int	size (Optional) The string-valued column length.
String	type
boolean	unique
boolean	useFK depends on ref /
String	using

元素详细资料

size

public abstract int size

(Optional) The string-valued column length. (Applies only if a string-valued column is used.) The decimal column scale for a decimal (exact numeric) column

返回:

字符串长度

默认值:

255

name

public abstract String name

返回:

字段名称

默认值:

""

type

public abstract String type

返回:

字段类型名称

默认值:

""

defaultValue

public abstract String defaultValue

返回:

字段默认值

默认值:

""

comment

public abstract String comment

返回:

字段描述

默认值:

""

unique

public abstract boolean unique

返回:

是否包含唯一约束

默认值:

false

using

public abstract String using

返回:

索引使用类型，默认tree

默认值:

""

nullable

public abstract boolean nullable

返回:

是否可为null约束

默认值:

false

pattern

public abstract String pattern

返回:

字段符合模式

默认值:

""

precision

public abstract int precision

(Optional) The precision for a decimal (exact numeric) column. (Applies only if a decimal column is used.) Value must be set by developer if used when generating the DDL for the column.

返回:

精度数值

默认值:

0

scale

public abstract int scale

(Optional) The scale for a decimal (exact numeric) column. (Applies only if a decimal column is used.)

返回:

规模

默认值:

0

ref

public abstract Class<?> ref

如果该类标注@Model则说明表示。

返回:

引用的类

默认值:

void.class

useFK

public abstract boolean useFK

depends on ref /

返回:

是否使用外键

默认值:

false