fix: initialize teaching class score weight schema

src/main/java/com/sztzjy/linkCommerce/config/TeachingClassScoreWeightSchemaInitializer.java

@@ -0,0 +1,33 @@
+package com.sztzjy.linkCommerce.config;
+
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+
+/**
+ * Keeps deployments compatible with databases created before class score
+ * weights were introduced.
+ */
+@Component
+public class TeachingClassScoreWeightSchemaInitializer {
+    private final JdbcTemplate jdbcTemplate;
+
+    public TeachingClassScoreWeightSchemaInitializer(JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @PostConstruct
+    public void initialize() {
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS teaching_class_score_weight (" +
+                "teaching_class_id varchar(64) NOT NULL," +
+                "foundation_weight decimal(6,4) NOT NULL DEFAULT 0.1000," +
+                "market_insight_weight decimal(6,4) NOT NULL DEFAULT 0.3000," +
+                "planning_design_weight decimal(6,4) NOT NULL DEFAULT 0.1000," +
+                "development_validation_weight decimal(6,4) NOT NULL DEFAULT 0.1000," +
+                "launch_operation_weight decimal(6,4) NOT NULL DEFAULT 0.2000," +
+                "comprehensive_training_weight decimal(6,4) NOT NULL DEFAULT 0.2000," +
+                "PRIMARY KEY (teaching_class_id)" +
+                ") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci");
+    }
+}

src/test/java/com/sztzjy/linkCommerce/config/TeachingClassScoreWeightSchemaInitializerTest.java

@@ -0,0 +1,34 @@
+package com.sztzjy.linkCommerce.config;
+
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+class TeachingClassScoreWeightSchemaInitializerTest {
+
+    @Test
+    void createsMissingScoreWeightTableWithEveryWeightColumn() {
+        JdbcTemplate jdbcTemplate = mock(JdbcTemplate.class);
+        TeachingClassScoreWeightSchemaInitializer initializer =
+                new TeachingClassScoreWeightSchemaInitializer(jdbcTemplate);
+
+        initializer.initialize();
+
+        ArgumentCaptor<String> statement = ArgumentCaptor.forClass(String.class);
+        verify(jdbcTemplate).execute(statement.capture());
+        String ddl = statement.getValue();
+        assertTrue(ddl.startsWith("CREATE TABLE IF NOT EXISTS teaching_class_score_weight"));
+        assertTrue(ddl.contains("teaching_class_id varchar(64) NOT NULL"));
+        assertTrue(ddl.contains("foundation_weight decimal(6,4) NOT NULL DEFAULT 0.1000"));
+        assertTrue(ddl.contains("market_insight_weight decimal(6,4) NOT NULL DEFAULT 0.3000"));
+        assertTrue(ddl.contains("planning_design_weight decimal(6,4) NOT NULL DEFAULT 0.1000"));
+        assertTrue(ddl.contains("development_validation_weight decimal(6,4) NOT NULL DEFAULT 0.1000"));
+        assertTrue(ddl.contains("launch_operation_weight decimal(6,4) NOT NULL DEFAULT 0.2000"));
+        assertTrue(ddl.contains("comprehensive_training_weight decimal(6,4) NOT NULL DEFAULT 0.2000"));
+        assertTrue(ddl.contains("PRIMARY KEY (teaching_class_id)"));
+    }
+}