#609 - SQLite DDL - disable use of comments and alter table add foreign key (as these are not supported by SQLite)

src/main/java/com/avaje/ebean/dbmigration/ddlgeneration/platform/BaseTableDdl.java

@@ -309,7 +309,10 @@ public class BaseTableDdl implements TableDdl {
 
   protected void alterTableAddForeignKey(DdlBuffer buffer, String fkName, String tableName, String[] columns, String refTable, String[] refColumns) throws IOException {
 
-    buffer.append(platformDdl.alterTableAddForeignKey(tableName, fkName, columns, refTable, refColumns)).endOfStatement();
+    String fkConstraint = platformDdl.alterTableAddForeignKey(tableName, fkName, columns, refTable, refColumns);
+    if (fkConstraint != null && !fkConstraint.isEmpty()) {
+      buffer.append(fkConstraint).endOfStatement();
+    }
   }
 
   protected void appendColumns(String[] columns, DdlBuffer buffer) throws IOException {

src/main/java/com/avaje/ebean/dbmigration/ddlgeneration/platform/SQLiteDdl.java

@@ -2,6 +2,9 @@ package com.avaje.ebean.dbmigration.ddlgeneration.platform;
 
 import com.avaje.ebean.config.dbplatform.DbIdentity;
 import com.avaje.ebean.config.dbplatform.DbTypeMap;
+import com.avaje.ebean.dbmigration.ddlgeneration.DdlBuffer;
+
+import java.io.IOException;
 
 /**
  * DB2 platform specific DDL.
@@ -12,5 +15,20 @@ public class SQLiteDdl extends PlatformDdl {
     super(platformTypes, dbIdentity);
     this.identitySuffix = "";
   }
-  
+
+  @Override
+  public void addTableComment(DdlBuffer apply, String tableName, String tableComment) throws IOException {
+    // not supported
+  }
+
+  @Override
+  public void addColumnComment(DdlBuffer apply, String table, String column, String comment) throws IOException {
+    // not supported
+  }
+
+  @Override
+  public String alterTableAddForeignKey(String tableName, String fkName, String[] columns, String refTable, String[] refColumns) {
+    // not supported
+    return null;
+  }
 }