From 1688666dca89c6b8ef117e24541d8ce67345c899 Mon Sep 17 00:00:00 2001
From: Timi <imyeyu6@qq.com>
Date: Sun, 2 Nov 2025 20:59:27 +0800
Subject: [PATCH] add BaseMapper.updateSelective

---
 .../com/imyeyu/spring/mapper/BaseMapper.java  |  3 ++
 .../com/imyeyu/spring/util/SQLProvider.java   | 39 ++++++++++++++++++-
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/imyeyu/spring/mapper/BaseMapper.java b/src/main/java/com/imyeyu/spring/mapper/BaseMapper.java
index 8876157..af7a5c7 100644
--- a/src/main/java/com/imyeyu/spring/mapper/BaseMapper.java
+++ b/src/main/java/com/imyeyu/spring/mapper/BaseMapper.java
@@ -93,6 +93,9 @@ public interface BaseMapper<T, P> {
 	@UpdateProvider(type = SQLProvider.class, method = "update")
 	void update(T t);
 
+	@UpdateProvider(type = SQLProvider.class, method = "updateSelective")
+	void updateSelective(T t);
+
 	/**
 	 * 软删除
 	 *
diff --git a/src/main/java/com/imyeyu/spring/util/SQLProvider.java b/src/main/java/com/imyeyu/spring/util/SQLProvider.java
index 4491f81..9cade2a 100644
--- a/src/main/java/com/imyeyu/spring/util/SQLProvider.java
+++ b/src/main/java/com/imyeyu/spring/util/SQLProvider.java
@@ -9,6 +9,7 @@ import com.imyeyu.spring.annotation.table.Column;
 import com.imyeyu.spring.annotation.table.Id;
 import com.imyeyu.spring.annotation.table.Table;
 import com.imyeyu.spring.annotation.table.Transient;
+import com.imyeyu.spring.entity.BaseEntity;
 import com.imyeyu.spring.entity.Creatable;
 import com.imyeyu.spring.entity.Deletable;
 import com.imyeyu.spring.entity.Destroyable;
@@ -183,7 +184,43 @@ public class SQLProvider {
 			                                       if (entity instanceof Updatable updatableEntity) {
 				                                       updatableEntity.setUpdatedAt(Time.now());
 			                                       }
-												   return "`%s` = #{%s}".formatted(fc.columnName, fc.fieldName);
+			                                       return "`%s` = #{%s}".formatted(fc.columnName, fc.fieldName);
+		                                       })
+		                                       .collect(Collectors.joining(", "));
+		return "UPDATE `%s` SET %s WHERE `%s` = #{%s}".formatted(meta.table, setClause, meta.idFieldColumn.columnName, meta.idFieldColumn.fieldName);
+	}
+
+	/**
+	 * 根据 ID 更新，选择性更新非空属性，需要实体实现 {@link Updatable}
+	 *
+	 * @param entity 实体
+	 * @return SQL
+	 */
+	public String updateSelective(Object entity) {
+		EntityMeta meta = getEntityMeta(entity.getClass());
+		TimiException.required(meta.idFieldColumn, "not found id field in %s".formatted(meta.entityClass));
+		TimiException.required(meta.canUpdate, "not allow update for %s".formatted(meta.entityClass));
+
+		if (entity instanceof BaseEntity baseEntity) {
+			baseEntity.setCreatedAt(null);
+			baseEntity.setDeletedAt(null);
+		}
+		String setClause = meta.fieldColumnList.stream()
+		                                       .filter(fc -> {
+			                                       if (fc.isId) {
+				                                       return false;
+			                                       }
+			                                       try {
+				                                       return Ref.getFieldValue(entity, fc.field, Object.class) != null;
+			                                       } catch (IllegalAccessException e) {
+				                                       throw new RuntimeException(e);
+			                                       }
+		                                       })
+		                                       .map(fc -> {
+			                                       if (entity instanceof Updatable updatableEntity) {
+				                                       updatableEntity.setUpdatedAt(Time.now());
+			                                       }
+			                                       return "`%s` = #{%s}".formatted(fc.columnName, fc.fieldName);
 		                                       })
 		                                       .collect(Collectors.joining(", "));
 		return "UPDATE `%s` SET %s WHERE `%s` = #{%s}".formatted(meta.table, setClause, meta.idFieldColumn.columnName, meta.idFieldColumn.fieldName);