修复ArithmeticQueryColumn算术运算无法拼接条件的问题 #添加测试代码

mybatis-flex-core/src/test/java/com/mybatisflex/coretest/query/ArithmeticQueryColumnTest.java

@@ -31,7 +31,10 @@ public class ArithmeticQueryColumnTest {
         return dialect.forSelectByQuery(queryWrapper);
     }
 
+    @Test
+    public void testAddWithCondition(){
 
+    }
     @Test
     public void testAdd() {
         QueryWrapper query = new QueryWrapper()

mybatis-flex-test/mybatis-flex-native-test/src/main/java/com/mybatisflex/test/Demo.java

@@ -0,0 +1,71 @@
+package com.mybatisflex.test;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.KeyType;
+import com.mybatisflex.annotation.Table;
+import com.mybatisflex.core.activerecord.Model;
+import com.mybatisflex.core.keygen.KeyGenerators;
+
+import java.math.BigDecimal;
+
+@Table("demo")
+public class Demo extends Model<Demo> {
+    @Id(keyType = KeyType.Generator, value = KeyGenerators.snowFlakeId)
+    private String id;
+
+    public static Demo create() {
+        return new Demo();
+    }
+
+    private BigDecimal firstField;
+    private String userId;
+    private BigDecimal secondField;
+    private String foreignId;
+
+    public String getId() {
+        return id;
+    }
+
+    public Demo setId(String id) {
+        this.id = id;
+        return this;
+    }
+
+    public BigDecimal getFirstField() {
+        return firstField;
+    }
+
+    public Demo setFirstField(BigDecimal firstField) {
+        this.firstField = firstField;
+        return this;
+    }
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public Demo setUserId(String userId) {
+        this.userId = userId;
+        return this;
+
+    }
+
+    public BigDecimal getSecondField() {
+        return secondField;
+    }
+
+    public Demo setSecondField(BigDecimal secondField) {
+        this.secondField = secondField;
+        return this;
+    }
+
+    public String getForeignId() {
+        return foreignId;
+    }
+
+    public Demo setForeignId(String foreignId) {
+        this.foreignId = foreignId;
+        return this;
+    }
+}
+

mybatis-flex-test/mybatis-flex-native-test/src/test/java/com/mybatisflex/test/ArithmeticQueryColumnTest.java

@@ -0,0 +1,18 @@
+package com.mybatisflex.test;
+
+import com.mybatisflex.core.query.QueryMethods;
+import org.junit.Test;
+
+import java.math.BigDecimal;
+
+public class ArithmeticQueryColumnTest {
+    @Test
+    public void testAddWithCondition() {
+        BigDecimal bigDecimal = Demo.create()
+            .select(QueryMethods.sum(Demo::getFirstField)
+                .add(QueryMethods.sum(QueryMethods.if_(QueryMethods.column(Demo::getForeignId).eq("1"), QueryMethods.column(Demo::getSecondField), QueryMethods.number(0)))))
+            .where(Demo::getUserId).eq("1").objAsOpt(BigDecimal.class).orElse(BigDecimal.ZERO);
+        System.out.println(bigDecimal);
+    }
+
+}

mybatis-flex-test/mybatis-flex-native-test/test.sql

@@ -0,0 +1,25 @@
+CREATE TABLE `demo`
+(
+    `id`          varchar(255) COLLATE utf8mb4_general_ci NOT NULL,
+    `first_field` decimal(10, 2)                          DEFAULT NULL,
+    `foreign_id`  varchar(255) collate utf8mb4_general_ci default null,
+    second_field  decimal(10, 2)                          DEFAULT NULL,
+    user_id       varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+    PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('1', 10.12, '1', 12.2, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('2', 10.12, '2', 12.2, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('3', 10.12, '3', 12.2, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('4', 10.12, '4', 12.2, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('5', 10.12, '5', 12.2, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('6', 10.12, '6', NUll, '1');
+INSERT INTO `demo` (`id`, `first_field`, `foreign_id`, second_field, user_id)
+values ('7', NULL, '7', 12.2, '1');