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selectAs重载

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yulichang 2022-12-21 14:49:48 +08:00
parent 693a18e5b9
commit 7744f7c3a0
1 changed files with 23 additions and 0 deletions
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mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Query.java
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@ -4,6 +4,7 @@ import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import com.baomidou.mybatisplus.core.metadata.TableInfoHelper;
import com.baomidou.mybatisplus.core.toolkit.Assert;
import com.baomidou.mybatisplus.core.toolkit.Constants;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.github.yulichang.toolkit.LambdaUtils;
import com.github.yulichang.toolkit.MPJReflectionKit;
@ -71,6 +72,28 @@ public interface Query<Children> extends Serializable {
return getChildren();
}
/**
* String 查询
*
* @param column 列
*/
default <E> Children select(String column, SFunction<E, ?> alias) {
getSelectColum().add(new SelectString(column + Constants.AS + LambdaUtils.getName(alias)));
return getChildren();
}
/**
* String 查询
*
* @param column 列
*/
default <E> Children select(String index, SFunction<E, ?> column, SFunction<E, ?> alias) {
Map<String, SelectCache> cacheMap = ColumnCache.getMapField(LambdaUtils.getEntityClass(column));
SelectCache cache = cacheMap.get(LambdaUtils.getName(column));
getSelectColum().add(new SelectString(index + Constants.DOT + cache.getColumn() + Constants.AS + LambdaUtils.getName(alias)));
return getChildren();
}
/**
* 说明：
* 比如我们需要查询用户表有10个字段，然而我们只需要3个就够了，用mybatis-plus提供的select<p />