MyBatis-Plus

# Annotation

It's about the annotations in MybatisPlus (For more details, pls refer to the source code)

Packages：

👉 mybatis-plus-annotation

# @TableName

  • Description：annotation for DB table name
Properties Type Required Default val Description
value String N "" DB table name
resultMap String N "" resultMap id in *mapper.xml
schema String N "" schema(@since 3.1.1)
keepGlobalPrefix boolean N false true: keep using the tablePrefix in Global Configuration(if tablePrefix configurated in Global, will set the Global value here automatically)(@since 3.1.1)

# @TableId

  • Description：annotation for Primary Key
Properties Type Required Default val Description
value String N "" column name of the PK, if java entity propertyName is "id", will be recognized as PK
type Enum N IdType.NONE PK type(e.g. AUTO, UUID, ID_WORKER, INPUT)

# IdType

Val Descp
AUTO autoincrement by DB
INPUT user specify manually
ID_WORKER distributed union ID, Long type
UUID UUID String with length of 32
NONE nothing
ID_WORKER_STR String value of ID_WORKER

# @TableField

  • Description：annotation for column(non-PK)
Properties Type Required Default val Description
value String N "" column name
el String N "" Mapped to #{ ... } for native, equivalently write #{ ... } in *mapper.xml
exist boolean N true false: NOT a column, just temporary property
condition String N "" config the expression in where condition, by default it's EQUAL, reference
update String N "" e.g. value="version", update="%s+1", when do update, 'version=version+1' will be appended to update xx_table set xxx=xxx (this property has higher priority than el )
insertStrategy Enum N DEFAULT specify the strategy of this column when do insert, e.g. NOT_NULL: insert into table_a(<if test="columnProperty != null">column</if>) values (<if test="columnProperty != null">#{columnProperty}</if>) (since v_3.1.2)
updateStrategy Enum N DEFAULT specify the strategy of this column when do update, e.g. IGNORED: update table_a set column=#{columnProperty} (since v_3.1.2)
whereStrategy Enum N DEFAULT specify the strategy of this column when do query, e.g. NOT_EMPTY: where <if test="columnProperty != null and columnProperty!=''">column=#{columnProperty}</if> (since v_3.1.2)
fill Enum N DEFAULT auto fill strategy: INSERT, UPDATE, INSERT_UPDATE
select boolean N true false: this column will not appear in select expression
keepGlobalFormat boolean N false whether keep the Global column name format(e.g. UnderscoreToCamelCase) (@since 3.1.1)

# FieldStrategy

Val Descp
IGNORED ignored
NOT_NULL <if test="columnProperty != null">column=#{columnProperty}</if>
NOT_EMPTY <if test="columnProperty != null and columnProperty!=''">(only support String column, for other types, will processed as NOT_NULL)
DEFAULT keep the Global config

# FieldFill

Val Descp
DEFAULT bypass
INSERT fill the column when do insert(should specify the filled value in MetaObjectHandler)
UPDATE fill the column when do update
INSERT_UPDATE fill the column when do both insert/update

# @Version

  • Description：annotation for Optimistic Lock, drop @Verison on the version property

# @EnumValue

  • Description：annotation for enum property, to specify the real column value, and map to enum property

# @TableLogic

  • Description：annotation to specify the Logic delete column
Properties Type Required Default val Description
value String N "" value for non-deleted records
delval String N "" value for deleted records

# @SqlParser

  • Description：annotation for tenant (annotation for mapper is supported since 3.1.1)
Properties Type Required Default Val Description
filter boolean N false true: bypass ISqlParser.doFilter(), otherwise sql will be parsed in ISqlParser chain and append addition conditions such as tenant_id, etc.

# @KeySequence

  • Description：use DB sequence as PK, such as oracle.sequence
Properties Type Required Default val Description
value String Y "" sequence name
clazz Class N Long.class return value type, if String.class, will return Number.toString: "1"

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