Package com.github.yulichang.extension.kt.interfaces

Interface QueryLabel<Children>

All Known Implementing Classes:

KtLambdaWrapper

public interface QueryLabel<Children>

对一或对多查询

Since:

1.4.6

Author:

yulichang

Method Summary

Modifier and Type	Method	Description
void	addLabel(Label<?> label, boolean isCollection)
Children	getChildren()
default Children	selectAssociation(Class<?> child, kotlin.reflect.KProperty<?> dtoField)	对一查询 用法参考 selectCollection
default Children	selectAssociation(Class<?> child, kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabel.Builder<?,?>> collection)	对一查询 用法参考 selectCollection
default Children	selectAssociation(String prefix, Class<?> child, kotlin.reflect.KProperty<?> dtoField)
default Children	selectAssociation(String prefix, Class<?> child, kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabel.Builder<?,?>> collection)
default Children	selectAssociation(kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabelFree.Builder<?>> collection)
default Children	selectCollection(Class<?> child, kotlin.reflect.KProperty<?> dtoField)	一对多查询 调用此方法发必需要调用对应的 left join / right join ...
default Children	selectCollection(Class<?> child, kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabel.Builder<?,?>> collection)	一对多查询 调用此方法发必需要调用对应的 left join / right join ...
default Children	selectCollection(String prefix, Class<?> child, kotlin.reflect.KProperty<?> dtoField)
default Children	selectCollection(String prefix, Class<?> child, kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabel.Builder<?,?>> collection)
default Children	selectCollection(kotlin.reflect.KProperty<?> dtoField, MFunction<MybatisLabelFree.Builder<?>> collection)

Method Details

addLabel

void addLabel(Label<?> label,
 boolean isCollection)

getChildren

Children getChildren()

selectCollection

default Children selectCollection(Class<?> child,
 kotlin.reflect.KProperty<?> dtoField)

一对多查询 调用此方法发必需要调用对应的 left join / right join ... 连表方法，否则会报错

举例 UserDO AddressDO 为一对多关系 UserDTO 为结果类

     MPJLambdaWrapper<UserDO> wrapper = new MPJLambdaWrapper<UserDO>();
     wrapper.selectAll(UserDO.class)
            .selectCollection(AddressDO.class, UserDTO::getAddressListDTO)
            .leftJoin(AddressDO.class, ...... )
            .eq(...)
            ...
 
 会自动将 AddressDO类中相同属性的字段 以mybatis的方式映射到UserDTO.addressListDTO属性中

Parameters:

child - 连表数据库实体类

dtoField - 包装类对应的属性

Since:

1.3.0

selectCollection

default Children selectCollection(String prefix,
 Class<?> child,
 kotlin.reflect.KProperty<?> dtoField)

selectCollection

default Children selectCollection(Class<?> child,
 kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabel.Builder<?,?>> collection)

一对多查询 调用此方法发必需要调用对应的 left join / right join ... 连表方法，否则会报错

举例 UserDO AddressDO 为一对多关系 UserDTO 为结果类

   MPJLambdaWrapper<UserDO> wrapper = new MPJLambdaWrapper();
   wrapper.selectAll(UserDO.class)
      .selectCollection(AddressDO.class, UserDTO::getAddressListDTO, map -> map
           .id(AddressDO::getId, AddressDTO::getId)                 //如果属性名一致 可以传一个
           .result(AddressDO::getUserId)                            //如果属性名一致 可以传一个
           .result(AddressDO::getAddress, AddressDTO::getAddress))) //如果属性名一致 可以传一个
      .leftJoin(AddressDO.class, ...... )
      .eq(...)
      ...
 

 会自动将 AddressDO类中指定的字段 以mybatis的方式映射到UserDTO.addressListDTO属性中

Parameters:

child - 连表数据库实体类

dtoField - 包装类对应的属性

collection - collection标签内容

Since:

1.3.0

selectCollection

default Children selectCollection(kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabelFree.Builder<?>> collection)

selectCollection

default Children selectCollection(String prefix,
 Class<?> child,
 kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabel.Builder<?,?>> collection)

selectAssociation

default Children selectAssociation(Class<?> child,
 kotlin.reflect.KProperty<?> dtoField)

对一查询 用法参考 selectCollection

Since:

1.3.0

selectAssociation

default Children selectAssociation(String prefix,
 Class<?> child,
 kotlin.reflect.KProperty<?> dtoField)

selectAssociation

default Children selectAssociation(Class<?> child,
 kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabel.Builder<?,?>> collection)

对一查询 用法参考 selectCollection

Since:

1.3.0

selectAssociation

default Children selectAssociation(kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabelFree.Builder<?>> collection)

selectAssociation

default Children selectAssociation(String prefix,
 Class<?> child,
 kotlin.reflect.KProperty<?> dtoField,
 MFunction<MybatisLabel.Builder<?,?>> collection)