diff --git a/src/main/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImpl.java b/src/main/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImpl.java
index fc56b9c..2e7b85b 100644
--- a/src/main/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImpl.java
+++ b/src/main/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImpl.java
@@ -18,6 +18,7 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import javax.annotation.PostConstruct;
 import java.util.Date;
 import java.util.UUID;
 
@@ -44,6 +45,11 @@ public class StudentTrainingAnswerServiceImpl implements StudentTrainingAnswerSe
 
     private boolean studentTrainingAnswerTableChecked = false;
 
+    @PostConstruct
+    public void initializeSchema() {
+        ensureStudentTrainingAnswerTable();
+    }
+
     @Override
     public StudentTrainingAnswer get(String taskKey, String teachingClassId, JwtUser user) {
         ensureStudentTrainingAnswerTable();
diff --git a/src/test/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImplTest.java b/src/test/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImplTest.java
index f6b47ee..a502d8a 100644
--- a/src/test/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImplTest.java
+++ b/src/test/java/com/sztzjy/linkCommerce/service/impl/StudentTrainingAnswerServiceImplTest.java
@@ -152,6 +152,17 @@ class StudentTrainingAnswerServiceImplTest {
         verify(service.jdbcTemplate).execute(startsWith("CREATE TABLE IF NOT EXISTS student_training_step_answer"));
     }
 
+    @Test
+    void startupInitializesDynamicStepAnswerColumnBeforeHomepageQueries() {
+        StudentTrainingAnswerServiceImpl service = buildService();
+        service.jdbcTemplate = mock(JdbcTemplate.class);
+
+        service.initializeSchema();
+
+        verify(service.jdbcTemplate).execute(startsWith(
+                "ALTER TABLE student_training_answer ADD COLUMN dynamic_step_answers"));
+    }
+
     private StudentTrainingAnswerServiceImpl buildService() {
         StudentTrainingAnswerServiceImpl service = new StudentTrainingAnswerServiceImpl();
         service.studentTrainingAnswerMapper = mock(StudentTrainingAnswerMapper.class);