Mybatis-plus 自定义SQL注入器查询@TableLogic 逻辑删除后的数据
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目录
3.1 方案1,继承 AbstractMethod拼接SQL语句
3.2. 方案2,继承 AbstractMethod拼接SQL语句
6.1 业务mapper继承自定义的CustomBaseMapper
6.2 调用方法selectIgnoreLogicDelete
6.3 调用方法selectIgnoreLogicDeleteByMap
1 需求
Mybatis-plus使用@TableLogic注解进行逻辑删除数据后,在某些场景下,又需要查询该数据时,又不想写SQL。
2 解决方案
自定义Mybatis-plus的SQL注入器一劳永逸的解决该问题
3 方案:
3.1 方案1,继承 AbstractMethod拼接SQL语句
public class SelectIgnoreLogicDeleteByMap extends AbstractMethod
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo)
String sqlBase= "<script>SELECT %s FROM %s %s\\n</script>";
String sqlScript = this.sqlWhereByMap(tableInfo);
String sql = String.format(sqlBase, this.sqlSelectColumns(tableInfo, false), tableInfo.getTableName(), sqlScript);
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sql, Map.class);
return this.addSelectMappedStatementForTable(mapperClass, "selectIgnoreLogicDeleteByMap", sqlSource, tableInfo);
/**
* 拼接where条件根据map参数
*
* @param table 表
* @return sql
*/
protected String sqlWhereByMap(TableInfo table)
String sqlScript;
sqlScript = SqlScriptUtils.convertChoose("v == null", " $k IS NULL ", " $k = #v ");
sqlScript = SqlScriptUtils.convertForeach(sqlScript, "cm", "k", "v", "AND");
sqlScript = SqlScriptUtils.convertWhere(sqlScript);
sqlScript = SqlScriptUtils.convertIf(sqlScript, String.format("%s != null and !%s", "cm", "cm.isEmpty"), true);
return sqlScript;
3.2. 方案2,继承 AbstractMethod拼接SQL语句
public class SelectIgnoreLogicDelete extends AbstractMethod
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo)
String sqlBase = "<script>%s SELECT %s FROM %s %s %s %s\\n</script>";
String sql = String.format(sqlBase, this.sqlFirst(), this.sqlSelectColumns(tableInfo, true), tableInfo.getTableName(), this.sqlWhereEntityWrapper(true, tableInfo), this.sqlOrderBy(tableInfo), this.sqlComment());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sql, modelClass);
return this.addSelectMappedStatementForTable(mapperClass, "selectIgnoreLogicDelete", sqlSource, tableInfo);
/**
* 拼接where条件
*
* @param newLine 新行
* @param table 表
* @return sql
*/
protected String sqlWhereEntityWrapper(boolean newLine, TableInfo table)
String sqlScript = table.getAllSqlWhere(false, true, "ew.entity.");
sqlScript = SqlScriptUtils.convertIf(sqlScript, String.format("%s != null", "ew.entity"), true);
sqlScript = sqlScript + "\\n";
sqlScript = sqlScript + SqlScriptUtils.convertIf(String.format(SqlScriptUtils.convertIf(" AND", String.format("%s and %s", "ew.nonEmptyOfEntity", "ew.nonEmptyOfNormal"), false) + " $%s", "ew.sqlSegment"), String.format("%s != null and %s != '' and %s", "ew.sqlSegment", "ew.sqlSegment", "ew.nonEmptyOfWhere"), true);
sqlScript = SqlScriptUtils.convertWhere(sqlScript) + "\\n";
sqlScript = sqlScript + SqlScriptUtils.convertIf(String.format(" $%s", "ew.sqlSegment"), String.format("%s != null and %s != '' and %s", "ew.sqlSegment", "ew.sqlSegment", "ew.emptyOfWhere"), true);
sqlScript = SqlScriptUtils.convertIf(sqlScript, String.format("%s != null", "ew"), true);
return newLine ? "\\n" + sqlScript : sqlScript;
4. 自定义SQL注入器,注册上述自定义的方法
public class CustomSqlInjector extends DefaultSqlInjector
@Override
public List<AbstractMethod> getMethodList(Class<?> mapperClass, TableInfo tableInfo)
List<AbstractMethod> methodList = super.getMethodList(mapperClass, tableInfo);
methodList.add(new SelectIgnoreLogicDeleteByMap());
methodList.add(new SelectIgnoreLogicDelete());
return methodList;
5. 自定义基础mapper,声明注册的方法
public interface CustomBaseMapper<T> extends BaseMapper<T>
/**
* 根据map条件查询数据,并忽略逻辑删除
*
* @param columnMap 查询条件
* @return 结果信息
*/
List<T> selectIgnoreLogicDeleteByMap(@Param("cm") Map<String, Object> columnMap);
/**
* 根据条件查询数据,并忽略逻辑删除
*
* @param queryWrapper 查询条件
* @return 结果信息
*/
List<T> selectIgnoreLogicDelete(@Param("ew") Wrapper<T> queryWrapper);
6. 使用声明的方法
6.1 业务mapper继承自定义的CustomBaseMapper
@Mapper
public interface UserMapper extends CustomBaseMapper<User>
6.2 调用方法selectIgnoreLogicDelete
@Override
public List<User> getIgnoreDeleteById(Long userId)
LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.eq(User::getId,userId);
return this.baseMapper.selectIgnoreLogicDelete(queryWrapper);
6.3 调用方法selectIgnoreLogicDeleteByMap
@Override
public List<User> getIgnoreDeleteById(Long userId)
Map<String, Object> columnMap = new HashMap<>(2);
columnMap.put("id", userId);
return this.baseMapper.selectIgnoreLogicDeleteByMap(columnMap);
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